Yes, of course Ilia, this is excellent advice.I am also depending on what the pigment suppliers are recommending, for example Irgazine is recommended as a fresco color by Sinopia. Kremer & Sinopia both advise the (synthetic?) ultramarine can can change hue - they recommend a mix "stablised for fresco" and I have been happily using it. The Cadmium colors, according to Kremer, "should only be used indoors". Malachite and azurite, kremer again, should be made up fresh each day otherwise a color change in the water.
I may need to "crank out" frescoes for the masses in the park, art fairs etc. - if the time is right, and you have just paid your $2000 in exhibit fees, you have to get moving - when Monday comes it will be all over. I am now painting a small detailed dove from a Tiepolo piece, it is 8" x12", takes less than half an hour to paint and will sell for fifty bucks. I can forsee the need to make a whole bunch of fast selling small items in one day - thats where the speedup cure comes in, they can be ready to sell within twenty fours hours.