A Complete View and a Complete Treatment: Conservation of the Roman Period Mummy Mask

After using humidification and four extra hands, the mask is now unfolded! This complete view of the object provides us a wonderful opportunity to look at the materials used in construction and allowed treatment to finally move forward.

Before jumping into treatment, I had the opportunity to perform Multispectral Imaging (MSI) on the mask, allowing us to analyze some of the pigments non-destructively and with great results.

E2462. From left to right: Visible light, Ultraviolet illumination, Visible induced IR luminescence

E2462.
From left to right: Visible light, Ultraviolet illumination, Visible induced IR luminescence

Under ultraviolet illumination, a bright pink fluorescence was visible (middle), indicating the use of a madder lake pigment in the cheeks and to accentuate the face and hands. I also used visible induced IR luminescence to pinpoint the use of Egyptian Blue pigment in the crown, jewelry, and green leaves (right, Egyptian Blue highlighted in pink). This is a material commonly found in Roman period Egyptian artifacts.

In addition to finding out some of the materials used, I also completed full documentation of the object. Although some of the surface is still intact, the paint layer is in poor condition with areas of flaking and powdering. There is also a large loss to the textile along with some smaller tears and holes.

E2462 During treatment detail of flaking paint

E2462 During treatment detail of flaking paint

As my first order of business, the paint needed to be stabilized. This paint, like many other Egyptian painted surfaces, is sensitive to water and adhesives can cause staining and darkening. This meant a lot of testing was required to find the perfect adhesive for the job.

Using both testing panels and small, discrete areas of the surface, I tested adhesives until I found funori, a seaweed-based polysaccharide. This material preserved the matte and light tones of both the paint and ground layers.

Amaris Sturm, summer intern, consolidating surface of E2462

Amaris Sturm, summer intern, consolidating surface of E2462

As treatments usually go, you sometimes get unexpected bumps along the way. As I was consolidating I discovered that the flesh tones in the face and hands were significantly more sensitive to the water-based adhesive. I quickly had to rethink my approach, ultimately using a methyl cellulose in 50:50 ethanol: water for the hands, face, and larger flakes in the yellow framing the face.

Once consolidation was complete, I moved on to the next hurdle: the molded mud plaster mask. A large gap is present between the fragmented mud plaster crown and the textile below. To support the plaster and its mends, I made a removable fill of carved Volara foam and Japanese tissue, all toned with Golden acrylic paints to make the supports more discrete.

Removable fills to support the heavy mud plaster crown in E2462

Removable fills to support the heavy mud plaster crown in E2462

Fragmented, actively shifting, and detached mud plaster was mended with a 40% AYAT in acetone applied by brush and syringe. Unstable and weightbearing cracks and gaps were filled with a 25% AYAT in acetone that was bulked with microballoons and toned with dry pigments. Fill material was applied with syringed, shaped with a brush and wooden skewer, and  smoothed with a little bit of acetone. A thin toning layer of acrylic paint was applied to fills to make them a warmer tone, but still distinguishable from original material.

Filling compromised gaps on E2462

Filling compromised gaps on E2462

And with that, the treatment is complete! The mask is now stable and will be returned to storage safe and sound.

E2462 Before treatment (left) and After treatment (left)

E2462 Before treatment (left) and after treatment (right)

  • Amaris Sturm is a second-year graduate student in the Winterthur/ University of Delaware Program in Art Conservation. She recently completed her summer internship in the Penn Museum’s conservation labs.

New Mask in the Lab

Amaris Sturm is a second-year graduate student in the Winterthur/ University of Delaware Program in Art Conservation. She is currently completing a summer internship in the Penn Museum’s conservation labs.

I’m excited to introduce a new addition to the objects in the Artifact Lab! This Roman period Egyptian mummy mask and shroud, likely from 220 – 250 AD and excavated from Deir el-Bahri in the late 19th century, will be one of my primary treatment projects during my summer at the Penn Museum.

E2462- Overall before treatment

E2462- Overall before treatment

Meant to be placed over the upper body of a mummy, this mask is constructed of multiple pieces of coarsely woven linen sewn into a long shroud.  At the top of the shroud is a hollow, molded mud plaster mask in the form of a man’s face with a jeweled crown. The entire front surface has a white ground with colorful painted decoration. Additionally, gilding is present on fragments of the crown.

Sadly, the mask was folded at some point in its history, obscuring most of the linen shroud. Although there are no records of the complete decorated surface and little is known about the history of the mask in our collection, other similar examples from Deir el-Bahri give great insight into what may be hidden beneath the folds.

Comparable mask in the Louvre collection

Comparable mask from the Louvre collection

Comparable examples, including this mask from the Louvre, show the continuation of the man’s white tunic with a goblet in one hand and a plant stem in the other. A lower register is likely present containing Sokar, a falcon-headed god, on a boat and flanked by two jackals. One jackal is visible on an exposed corner of the Penn Museum’s mask.

E2462- Crown before treatment

E2462- Molded mud plaster crown before treatment

Apart from being folded, the mask has other condition issues that will be treated over the course of my summer internship. The textile support of the crown has sagged, causing the mud plaster to break and crumble. Additionally, the exposed painted surface is flaking and the linen fabric has started to tear and unravel.

I hope to start treatment in this coming week and unfold the shroud, allowing us to better understand the construction, decoration, and condition of this mummy mask. Check back to see what it revealed and for more on the mask’s treatment!

Sources:

Panel Portrait of a Man. Louvre Museum. Accessed June 25, 2016. http://www.louvre.fr/en/oeuvre-notices/panel-portrait-man

Riggs, C. 2000. Roman Period Mummy Masks from Deir el-Bahri. From The Journal of Egyptian Archaeology, 86. Egypt Exploration Society. 121-144.

Examination and treatment of a cartonnage pectoral

We have had this object in the collection since 1890:

E352, overall before treatment

E352, overall before treatment

This painted cartonnage pectoral (E352) was made as a covering for the chest of a mummy, and dates to the Ptolemaic Period (ca. 200 BCE). We don’t have the mummy or any other items from the person’s burial, so we don’t know anything about who this belongs to other than that they were buried with this beautiful piece (and likely an equally nice mask, and leg and foot coverings).

This artifact was previously on display in our Secrets and Science gallery and is now in the lab for conservation treatment. It was displayed vertically for over three decades, but since it has come into the lab, we have removed it from the old mount to allow for a full examination, documentation, and treatment.

Multispectral imaging allowed us to identify the Egyptian blue paint used for all of the blue decoration:

An overall image of the pectoral in visible light (left) and a visible-induced IR luminescence image, where the Egyptian blue pigment appears white

An overall image of the pectoral in visible light (left) and a visible-induced IR luminescence image, where the Egyptian blue pigment appears white (right), and everything else is black

We have written about the unique luminescence of Egyptian blue before on this blog, and in the image on the right, above, we can clearly see where it was used to decorate this pectoral.

Conservation treatment so far has included consolidation of the flaking paint with methyl cellulose, carried out under the binocular microscope.

A detail of the pectoral, 7.5X magnification

A detail of the pectoral as viewed through the microscope, 7.5X magnification

I have also been filling small losses with a mixture of Klucel G and glass microballoons, and backing weak areas with Japanese tissue paper.

Here is a link to a mini-slideshow that shows a small section of the cartonnage under 7.5X magnification (the same section seen in the image above). The slidehow shows how I filled a tiny hole with the Klucel mixture, which then allowed me to readhere a tiny fragment of red paint. The change is subtle – see if you can spot where I reattached the paint flake!

 

Summer 2016 Conservation in South Abydos

I just returned from spending almost 3 weeks in Egypt on the Penn excavations in South Abydos. This was my second time on the project (I went for the first time last December/January). I specifically returned to continue work on the wall paintings in the burial chamber of pharaoh Senebkay and to provide additional conservation support for the project during my time there, which included object treatment, documentation, and block-lifting an extremely fragile wooden coffin fragment.

A view of the site in South Abydos, with Senebkay's burial chamber covered with a temporary shelter in the foreground

A view of the site in South Abydos, with Senebkay’s burial chamber covered with a temporary shelter in the foreground

I joined Dr. Josef Wegner (Joe) and his team at the end of their time in the field, so by the time I arrived, the season was well underway and everyone was doing their best to keep from melting in the exceedingly high temperatures and intense sun of the Upper Egyptian desert climate (think, getting up before sunrise to start working and during the hottest part of the day, sitting in front of a fan in a dark room).

There are times of the day when all you want to do is find a cool place to rest.

There are times of the day when all you want to do is find a cool place to rest.

Most of my days in Abydos were spent primarily in the field, working on the painted surfaces and limestone blocks in the burial chamber of pharaoh Senebkay. The work involved continuation of cleaning the limestone blocks, paint consolidation, stabilization of flaking limestone, and inpainting select missing areas of the painted decoration.

In the process of cleaning the painted surface in Senebkay's burial chamber

In the process of cleaning the painted surface in Senebkay’s burial chamber

I was fortunate this season to be joined by conservator Danny Doyle, who had worked on Senebkay’s burial chamber exactly a year ago, and who was also returning to Abydos for a second time. We had additional conservation support from the Egyptian conservation inspectors.

Danny working in the tomb (left) and myself, Yehia, one of the Egyptian conservation inspectors, and Danny in the tomb

Danny working in the tomb (left) and myself, Yehia (one of the Egyptian conservation inspectors), and Danny in the tomb

This season we also made the decision to open up the tomb chamber adjacent to the burial chamber to block lift a very fragile wooden coffin fragment. This fragment was left in place in previous seasons due to its fragile condition. Danny and I stabilized it, block lifted it, and we brought it back to the dig house to further clean, stabilize, and document.

A view of me working on the coffin fragment taken from the burial chamber (left), Danny working on the fragment in situ (center) and back in the lab (right)

A view from the burial chamber of me working on the coffin fragment (left), Danny working on the fragment in situ (center) and back in the lab (right)

In addition to the work in the field there was other work to do in the lab, including cleaning, consolidating, and mending fragments from a limestone stela, also from Senebkay’s tomb.

An overall view of the stela (left) and mending a detached fragment (right)

An overall view of the stela (left) and a mended fragment being supported while drying (right)

Following the conservation treatment, I assisted Joe in RTI imaging of the stela, capturing overall shots, and then details of specific areas of interest. For those unfamiliar with RTI (reflectance transformation imaging), it is a computational photographic method where you capture a bunch of images of an object from a fixed position while you move the light source around the object, illuminating it from different angles. An interactive RTI viewer tool allows you to use these images to enhance the surface features of an object which often reveals details not observed under regular lighting conditions. Dr. Jennifer Wegner worked on the translation of the text on this stela this season, and capturing these RTI images will allow this work to continue back at the Penn Museum. (More on RTI and how we use it here.)

Here is our amazing RTI setup - as you can see, Joe was happy that everything appears to be working properly (at this moment anyway).

Here is our amazing RTI setup – as you can see, Joe was happy that everything appears to be working properly (at this moment anyway). This image also gives you a sense of scale – this limestone stela is HUGE.

I am so grateful that I had the opportunity to return to Abydos, to continue to learn about this complex site, and to contribute to the long-term preservation of the finds. Besides the work, and our efforts to stay as cool as possible, we also played a lot of bocce in the evenings, and even celebrated a couple birthdays!

A competitive game of bocce in progress (left) and a party-pooped kitten (right)

A competitive game of bocce in progress (left) and a party-pooped kitten (right) (kitten photo by Jen Wegner)

Finally, I have to say that while being in Egypt was really exciting, there was plenty of exciting work happening right here in the museum the entire time I was gone. Since I left, nearly both of the large-scale Buddhist murals in the Chinese Rotunda have been taken down (thanks to the hard work, sweat, and hopefully no tears from an amazing team of conservators and riggers), the Egyptian storage move project is clipping along at an incredible rate, and there has otherwise been a whirlwind of activity in the department.

There isn't much left of those murals in the Rotunda. The left one is completely gone and the right one will be gone by next week.

There isn’t much left of the Buddhist murals in the Rotunda. The left one is completely gone and the one on the right will be gone by next week.

Kudos to all of my colleagues for keeping this all up while also holding down the fort in the Artifact Lab in my absence!

 

 

Treating Djed-Hapi’s wrappings

Djed-Hapi’s mummy is in good condition overall. The outer linen wrappings are mostly stable and retain some flexibility, although folding or heavily manipulating them would cause them to tear. Several of the ends of the linen bands are loose, and some are slightly frayed. The linens around his feet, however, are more significantly damaged. You can see in this detail photo the bottom of his big toe is exposed where the linens have been damaged at the bottom of his feet.

View of the bottom of Djed-Hapi's feet. The red arrow points to his exposed toe!

View of the bottom of Djed-Hapi’s feet. The red arrow points to his exposed toe!

There are also lots of metal pins visible, which were used to secure areas of loose or falling linen. These pins belong to at least two campaigns of treatment. One set is of steel pins with flat heads, some of which were painted beige to hide them, but not until after they were already inserted in the linens and are now in some places stuck to the fabric. The other set is of black insect pins with brass heads. There is also evidence of adhesive used in a few places to secure loose linen pieces.

Detail of the linens on the right side of Djed-Hapi's body. The red circle highlights a metal insect pin, and the green oval shows where adhesive was used to reattached broken linen.

Detail of the linens on the right side of Djed-Hapi’s body. The red circle highlights the brass head of an insect pin, and the green oval shows where adhesive was used to reattach broken linen.

Archival photos of an old display case here at the museum reveal that Djed-Hapi was removed from his coffin and displayed separately at least once. Currently, there are areas of hislinen wrappings which are folded back or otherwise misaligned, and it is likely this occurred when he was replaced in his coffin after being removed.  I was concerned about the condition of these areas of Djed-Hapi’s linen wrappings, and I decided that removing him once again from his coffin would give me much better access to assess and treat these areas properly.

It took 5 people – one at the head, two at the shoulders/torso and two at the lower legs/ankles – working together to lift Djed-Hapi out of his coffin and on to a foam-covered board support. We took special care to support his loose ankles, and to keep the head from shifting.

Left and right views of Djed-Hapi, after removing him from his coffin base.

Left and right views of Djed-Hapi, after removing him from his coffin base.

To begin the conservation treatment, the exterior linens and cartonnage pieces were cleaned using a HEPA-filtered vacuum with variable suction and soft brush. Next, the pins in the linen wrappings were removed systematically. In total, 16 steel pins and 42 insect pins were removed!

Folds and creases in the linen wrappings were humidified and flattened using GORE-TEX fabric, which acts as a moisture barrier, allowing water vapor to permeate to the linen wrappings but preventing any liquid water from wetting and staining the linen. The linen was allowed to humidify for ~10-15 minutes. Then the areas were either lightly weighted, or clamped between sheets of Volara to flatten.

During (left) and after (right) humidifying and flattening creases in Djed-Hapi's linen wrappings.

During (left) and after (right) humidifying and flattening creases in Djed-Hapi’s linen wrappings.

These areas could then be realigned, and were stabilized using nylon bobbinet fabric. The bobbinet was painted out using acrylic paints to match the color of the linen, and cut into bands which were long enough to reach from one side of the cartonnage pieces, around the back and to the other side. These bands were secured using tabs of Japanese tissue also toned with acrylics. These tissue tabs were adhered to the bobbinet using 3% Klucel  in ethanol, then secured to the mummy using 5% methylcellulose in deionized water. The tabs were tucked under either the cartonnage chest and leg pieces, or the top layer of linen. A few small sections of lifted linen, particularly along the sides of the mummy, were realigned and adhered using Japanese tissue and 5% methylcellulose in deionized water.

On the left, a detail of tissue tabs on bobbinett. On the right, before (top) and after (bottom) humidification and realignment, followed by a bobbinett support.

On the left, a detail of tissue tabs on bobbinet. On the right, before (top) and after (bottom) humidification and realignment, followed by a bobbinet support.

Because of how damaged and distorted the cartonnage foot covering was, it was removed from the mummy and treated separately (I’ll talk about this in the next blog post). This also allowed me to better see the linen wrappings around Djed-Hapi’s feet, and treat them more successfully. The linens around the feet were also encapsulated using toned bobbinet. Separate strips were used to support the linen around the ankles, under the heels, around the tops of the feet and around the toes. These bands were stitched together using hairsilk toned with acrylic paint.

Before (left) and after (right) using toned bobbinet to stabilize and secure the linen wrappings around Djed-Hapi's feet.

Before (left) and after (right) using toned bobbinet to stabilize and secure the linen wrappings around Djed-Hapi’s feet.

Here is an annotated image showing the bobbinet bands, and the locations of all the removed pins:

After treatment annotated image of Djed-Hapi.

After treatment annotated image of Djed-Hapi.

You may notice this image also gives away a big decision I had to make regarding the treatment of Djed-Hapi’s mask….stay tuned for the next post to learn all about it!

 

  • Alexis North, Project Conservator

APPEAR Project – APPEAR Interim Meeting at the British Museum

Hi! This is Eve Mayberger with an update about the Ancient Panel Painting: Examination, Analysis, and Research (APPEAR) project. During the past few months, I have been investigating the three Fayum mummy portraits in the Penn Museum with digital photography, multispectral imaging (MSI), portable x-ray fluorescence (pXRF), x-ray radiography, and reflectance transformation imaging (RTI). A few weeks ago, I had the opportunity to travel to London and represent the Penn Museum at the APPEAR interim meeting.

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APPEAR Project, British Museum

The meeting was jointly organized by the Getty and the British Museum. Representatives from invited institutions were asked to present an update on the current research of Fayum mummy portraits in their collections. Although not every participating institution was able to send a representative, there were individuals from the United Kingdom, Europe, and the United States. The group included conservators, conservation scientists, art historians, and artists who were all personally engaged with different aspects of the APPEAR project.

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APPEAR Project, Presentation at the APPEAR interim meeting

For the APPEAR research at the Penn Museum, I talked about our non-destructive analysis, imaging, and outreach initiatives for the three portraits in the collection. I focused on some unusual observations I recorded with MSI on the Portrait of a Young Man (E16213). My presentation was well received and inspired a lively debate about MSI terminology and standardization protocols.

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APPEAR Project, Penn Museum Presentation

Between talks and over meals, I was able to chat with other APPEAR participants about their various institutions and current research initiatives. At the end of the meeting, the British Museum was kind enough to give us an extensive tour of their new conservation labs and scientific research department. It was an amazing experience and I was honored to present our research at the Penn Museum to the larger APPEAR community.

Eve Mayberger, Curriculum Intern

Say hello to Djed-Hapi

I apologize in advance for those of you who might be waiting for more updates on the Middle Kingdom boat model I started working on a while ago. That object was put aside temporarily to make room for all the pieces that recently came into the Artifact Lab when we deinstalled our Mummy Room and Secrets and Science galleries. While the cases in those galleries were reinforced to better withstand vibrations from the hospital construction next door, and new mounts designed and made for many of the objects, we were working hard to assess the condition of all the pieces, and treat them as necessary before the galleries reopened. This was a pretty short turn around, and several of us in the Conservation Department here chipped in to help make sure every object was looked at properly before they went back on display.

While most of the objects are in good condition, and only needed a little surface cleaning to remove accumulated dust, some needed much more complicated and detailed treatments. I began by looking at our mummy Djed-Hapi, who is the first mummy you see when you enter the Secrets and Science gallery.

Djed-Hapi, with his coffin lid and base (E3413A-C), in the Egyptian Mummies: Secrets and Science gallery.

Djed-Hapi, with his coffin lid and base (E3413A-C), in The Egyptian Mummy: Secrets and Science gallery.

As you can see, In the original case design Djed-Hapi rests in his coffin base, while the lid is suspended above on a metal shelf. Unfortunately, the coffin lid will not be returning to the case, as the shelf it used to rest on cannot withstand the level of vibrations which may occur. Don’t worry though! It will remain in the Artifact Lab and be conserved as part of a future treatment project.

As for Djed-Hapi himself, we know that he dates to the Ptolemaic period (305-30 CE). We know his name, and in fact the names of several of his family members, because of the hieroglyphs written on his coffin lid. Here is an archival image of Djed-Hapi’s coffin lid and base, and you can see all the text written on the lid:

Scan of an archival negative showing E3413B-C.

Scan of an archival negative showing E3413B-C.

He was x-rayed in 1980, and from these images we can tell that he was a man who lived into his 50s before he died. While these old x-ray images were serviceable, we decided to re-x-ray him in our digital x-ray suite here at the museum, because we felt we could get a better level of detail with the digital system.

Djed-Hapi getting his x-rays taken in 2016 (left) and 1980 (right).

Study of these x-rays revealed some very interesting facts about Djed-Hapi’s mummification. His head is completely detached from his body, cleanly separated between two of the vertebrae in his neck.

Detail of the 1980 x-radiograph of Djed-Hapi's head. The red arrow shows where his spinal column stops.

Detail of the 1980 x-radiograph of Djed-Hapi’s head. The red arrow shows where his spinal column stops.

This was not his cause of death, but happened during mummification, and seems intentional. Starting in the Ptolemaic Period, the mummification process shifted from removing the deceased’s brain through the nose, to removing it through the base of the skull. The x-rays also show that Djed-Hapi’s nasal cavity seems to be intact, so this change in the mummification process may be the reason Djed-Hapi’s head was removed, then replaced and carefully wrapped with the rest of the body. The decapitation is not visible from the exterior, and in fact his head and neck area are quite stable.

The x-rays also reveal a bit about the condition of Djed-Hapi’s body underneath the wrappings. His skeleton is well-articulated (except for his head of course), including all his finger and toe bones, and you can even see the soft tissue preserved, which implies the body is in good condition. However, a closer look at his ankles shows that there is a rather large gap between the distal ends of his tibiae (shin bones) and his tarsals (ankle bones). While there is no evidence of damage to the exterior of the linens, we can tell whenever we have to move the mummy that the ankle area has some movement. This is an issue which could lead to further damage in the future, so careful handling is required.

2016 x-ray of Djed-Hapi, showing well-preserved soft tissue. The red rectangle highlights the gap between the bones in his ankles.

Next up, I’ll discuss the conservation treatment of Djed-Hapi’s mummy, and his coffin base.

Alexis North is the Project Conservator for the Egyptian Storage Move Project, Penn Museum.

References:

Fleming, S. (1980). The Egyptian mummy: Secrets and science. University of Pennsylvania.

Reattaching a mangled “ear”

If you read our blogposts back in February and March about x-raying our animal mummies (see Animal Mummies: contents revealed part I and part II) you will see that the cat mummy we x-rayed actually has no cat remains inside the wrappings. Here is the image of the cat mummy and radiograph:

50-17-1: mummy paired with radiograph

50-17-1: mummy paired with radiograph

Just because there is no cat inside, it doesn’t mean that we don’t treat it just like any of our other animal mummies. (And it doesn’t mean that these empty mummies were any less significant in ancient times either – check out this article which we’ve linked to in previous posts about the Manchester Museum and University of Manchester project which found that 1/3 of the 800 mummies they imaged have no remains inside.)

In the case of this cat mummy, it was in the lab for treatment so that it could be reinstalled in our Secrets and Science gallery. One of its major problems was that its right ear was mangled and partially detached.

Two views of the cat mummy's head, with red arrows pointing to the mangled ear

Two views of the cat mummy’s head, with red arrows pointing to the mangled ear

Repairing this area was slightly complicated because so much original material had been lost. I ended up flipping the cat mummy over and working on it from the back, and secured the ear using Japanese tissue paper toned with acrylic paint, adhered with 5% methylcellulose in deionized water.

Our little kitty patient wrapped in tissue paper and being supported on its belly for treatment

Our little kitty patient wrapped in tissue paper and being supported on its belly during treatment

This treatment worked well and will prevent further damage in that area in the future.

Two views of the cat mummy's head after treatment

Two views of the cat mummy’s head after treatment

Besides the ear, there were unraveling and torn areas of linen wrappings that needed to be secured. These areas were stabilized with strips of nylon bobbinet, toned with acrylic paint. The bobbinet was secured with hair silk toned with acrylic paint.

Overall view of the cat mummy before (left) and after (right) conservation treatment

Overall view of the cat mummy before (left) and after (right) conservation treatment

It doesn’t show up so well in some of these images, so here is a detail of the cat’s face, just because it’s so cute!

Detail of 50-17-1

Detail of 50-17-1

This cat mummy is now happily reinstalled in the Secrets and Science gallery, so you can see it anytime you visit the museum.

Tiny discoveries

As conservators, we derive great joy from the tiny discoveries we make every day as we carry out our work. Since Alexis North joined our Conservation Department as the Project Conservator for the Egyptian Storage Move Project, I have had a regular companion in the Artifact Lab, and so she and I get to share these tiny discoveries with each other on a regular basis. Not a day goes by without one of us yelping with surprise, or delight, when we see something unexpected, or beautiful, or just really, really cool.

Today, Alexis started working on our mummy Hapi-Men. I’ve posted a video of his CT-scan awhile ago on the blog, and he has been on exhibit here in the museum for decades. A mummified man dating to the Ptolemaic Period (30th Dynasty), he was excavated by Sir Flinders Petrie in cemetery G at Abydos in 1902.

Alexis carefully removing accumulated debris from Hapimen's beautifully wrapped fingers

Alexis carefully removing accumulated grime from Hapi-Men’s beautifully wrapped fingers

Just a few minutes ago, over the hum of the HEPA vacuum, Alexis exclaimed, I think I found an amulet! She has been cleaning accumulated grime and dust from the surface of Hapi-Men’s wrappings, and underneath all of that grime she indeed revealed an amulet that appears to be a scarab. We know from his CT-scan that he has many amulets included in his wrappings, but we didn’t expect that we’d be able to see one from the outside.

A detail of the amulet (highlighted with the yellow box) just below Hapi-Men's right hand

A detail of the amulet (highlighted with the yellow box) just below Hapi-Men’s right hand. Click on the image to view a larger version.

Super cool! More about his treatment soon.

APPEAR Project – Reflectance Transformation Imaging of the Fayum Mummy Portraits

Hi! This is Eve Mayberger with more information about the Ancient Panel Painting: Examination, Analysis, and Research (APPEAR) project. During the past few months, I have been investigating the three Fayum mummy portraits in the Penn Museum with digital photography, multispectral imaging (MSI), portable x-ray fluorescence (pXRF), and x-ray radiography. Recently, I completed reflectance transformation imaging (RTI) on the portraits with the help of Aislinn Smalling (Leventis Foundation Fellow) and Archer Smith (archaeology post-baccalaureate student). I was grateful to have help because RTI data capture is much easier with multiple people.

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APPEAR Project, Capturing RTI data for E16214 with Aislinn Smalling and Archer Smith

RTI is a type of computational photography that uses digital computation instead of optical processes to create new data. The principles of RTI are that the object and camera are placed in fixed positions. The light source (we used a triggered flash) is moved around the object at different angles. To ensure that the flash is at a set distance from the object, we tied a string to the light. Black spheres are included in each photo and the exact light position is determined from the highlight on the reflective spheres. Normally there are between 36-60 images collected to create one RTI data set.

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APPEAR Project, Four (4) out of the forty-eight (48) photos taken for the RTI data set for E16213

The real power of this technique is the interactive RTI Viewer tool which allows the subject to be re-lighted from any direction. Different rending modes can be helpful to bring out certain surface details such as incised designs or impressions. It is important to remember that this technique is only “pseudo 3D” and while it can be very informative on surface characteristics, it is not scalable or measurable.

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APPEAR Project, Screenshot of RTI Viewer for E16213

The results for E16213 were particularly interesting because we were looking to see if the “curls” visible under MSI were visible with RTI. While RTI showed the working techniques characteristic of encaustic painting, no incised lines corresponding with the curls were detected. Perhaps the curls visible with MSI relate to a pigment that had faded to the point where it is no longer visible under normal light. One possibility is that it could be madder but more research is needed to confirm this hypothesis.

Curl_comparison_web

APPEAR Project, Comparison of the curl region with MSI VIVL and RTI for E16213

In a few weeks, I will be presenting my research on the Penn Museum mummy portraits at the interim APPEAR meeting at the British Museum. Be sure to visit the blog in the upcoming weeks to read more about the APPEAR project and my experience in London!

Eve Mayberger, Curriculum Intern