Painting on Location by Donald A. Jusko

Buon Fresco
Secco Fresco
Casine Pigment Media

Test of Pigment Applied with Casein, Water and Lime Water in Wet Mortar. #21

Scrubbed with a hard scrub brush

media scrub test

02-10-04
Casein holds the pigment best. No Gloss.
Don't add casein to the mortar, it will cause cracking.
I wish I had tested egg yolk and alum here. It would have been strong with a gloss. Acrylic medium also works very well in both fresco and secco, don't add it to the mortar. It has the same gloss as the calcium carbonate in aged fresco.
Water weakens the lime and pigment bond. No Gloss.
Lime water holds but not as good as casein. No Gloss.

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