Hi there! What would be the ratio to mix rough cast of lime mixed with mastic and resin? Following Sebastiano del Piombo. The Agony and The Extasis. By Irving Stone. Page 668, second paragraph.
Hello there,
Unfortunately I won’t be able to help.
The problem with older recipes (even from the sixties), is that you need to figure out what they mean by “mastic” and “resin”. Because names, sources and purities change faster than one would like. “Resin” could be rosin, dammar, pine oil, copal from a country or another and so on.
Best to ask a workshop what they use currently and restart from there until an art historian can confirm what is.
Good luck.
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