#7, RE: Colour changes in fresco
Posted by Ilia on 11-Nov-00 at 10:13 PM
In response to message #0
Once I found this old recipe to test the colour change - "put some colour on the block of raw umber, it will absorb water from it before your yes..." I could never find a block of raw umber, so could not try this test to see how it works...
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