By: Céline Wachsmuth
It’s Tuesday and that means it’s time for another transformation story. This one comes from an object going into the Middle East Galleries (click here for more information on the exciting new galleries, opening this April!).
It’s hard to believe the first month of January is almost over! Many people make resolutions for the New Year, hoping to make an improvement, big or small (myself included, I have a Google doc with a list of resolutions). Most resolutions are easier said than done, including the prevalent resolution to shave a few pounds. This bowl had similar thoughts, but made losing some weight look like a piece of cake!
This bowl had been repaired in the past, but the joins needed to be taken down because the old adhesive was failing. The bowl was pretty clean when it came into the lab so it wasn’t long before I began solvent testing the adhesive in order to make a vapor chamber. The adhesive was soluble in acetone and most of the sherds separated with gentle prodding after eight days in a vapor chamber. The old fills (made of plaster), however, did not budge. This was probably due to the likelihood that they had been cast in place.
These ounces had to go! When a fill resists detachment by solvent, other, usually mechanical, methods have to be implemented. One mechanical treatment is to use a dremel, just like the one you might use at home for some smaller detailed work, to carve away the fill. This is tricky because the dremel can put the object at risk if used improperly. Once I was all set up and had been shown the proper technique, I slowly moved around the entire area of the fill.
Once the large fill was removed and those ounces had been shed, it was time for some TLC. I cleaned the break edges on each sherd with acetone (for the sherds previously joined with adhesive) or deionized water (for the sherds adjacent to the old fills). All the break edges were then coated with a dilute solution of Paraloid B-72 (ethyl methacrylate methyl acrylate copolymer) and the sherds were put back together with a 50% solution of Paraloid B-72 in 1:1 acetone:ethanol. Two small areas of the bowl had some gaps that needed to be filled; one for added structural stability and one to help complete the shape. This was done using a mixture of 3M microballoons, Paraloid B-72 in 1:1 acetone:ethanol, acetone, and some dry pigment to approximately color match the fill to the bowl. The fills needed some additional color to help blend in more and they were painted with light washes of acrylics.
This bowl made losing a couple ounces look easy even though we all know how much work really has to go in to something transformative! Thankfully, it’s only the beginning of the year and there is plenty of time to make your own transformations. Just like there’s plenty of time for another transformation to happen in the labs before our next Transformation Tuesday post – stay tuned!
PS – If you’re looking for some “ancient workout tips” check out these fun suggestions