Purveyor of Bollocks to the Crowned Heads of Europe
Monday, 13 August 2012
Not a black and white situation
In the ongoing process of replicating the Scagliola which itself replicates Porphyry, I need quite a few hundred little white chips...
... as well as quite a few (but considerably less) black ones. I am making it up as I go along, but in going along I have spread thin layers of a particularly special plaster on a sheet of glass, one of them tinted a deep black.
They have been dried out in the sun and now I have to crush and grade them further, until they are exactly the same sizes and shapes of the original. I will then have to assess the quantities that are needed to replicate the exact dispersal rate of the Georgian original, before mixing them in the red-based matrix which forms the background bulk of the Porphyry Scagliola.
Before I can do this, I have to carry out multiple colour-tests with plaster samples, until the exact hue of the blue-based red has been achieved, and I will have to keep an exact record of the quantities of pigments added (using scales) so that I can produce it a second/third/fourth/fifth - then final - time without accident.
When the missing parts have been replaced and polished, then I can begin restoring the lead-white paintings of cherubs which go over them. That bit is going to be a doddle by comparison.