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The Blue Brick 1-16-04 The base coat has ultramarine blue light added to the mortar. The top coat, when it's ready to paint, will have sections with a wide 'V' giornate cut and removed down to this base rough coat that I applied fairly smooth.
1-20-04, Four days later this is what the blue brick looked like. 
Now I'm doing a color test in a jar_of_lime for all my blues, cobalt blue deep, thalo blue, ultramarine blue light and ultramarine blue deep. Each has the same amount of fresh lime, pigment and water. Cobalt blue Light just arrived, I'll test it next. Because of this ultramarine blue failure I am testing all colors in a jar of wet lime milk. 
Bad news.. both ultramarine blues turned white, the cobalt blue deep turned a deep gray. Only the thalo blue remained unchanged for fresco work. 
2-8-4 The next 3 color tested in a jar of lime are Cobalt Blue Light, Cobalt Turquoise and Cerulean Blue. Fifteen days later they were still doing great, they are line safe. The next test, 02-20-04 is with Thalo Red, Alizarin Crimson, Quinacridone Magenta, Cadmium Orange and Thalo Green. 03-12-04 no changes. That makes the test complete, all 37 colors are lime proof. Jar lime color tests 
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