You would only add gypsum or white cement to lime plaster to make it set faster and harder, White cement may have application for outdoor murals when exposure to moist climate or rain might effect your work before the lime plaster has time to set up.
<<which pigments are you getting?>>
Finally getting the malachite - manufactured grade to start
Mars Black - I have been using this already, I like that it has no blue in it.
Irgazine Orange - a new substitute for Cadmium
Rinmans Green - a pretty green, to offset my Heliogen and Malachite
Cobalt Cerulean Blue I need this hue - is Zirconium better?
Terre Ercolano - a mix or earth oranges (Kremer)
Verono Green Earth w/viridian - a mix of green earths (Kremer)
A very yellow French Ochre (JTCLES)
Italina Raw Sienna
Genuine Green Earth (a big supply to what I am already using)
Mars Yellow - clear yellow oxide
One question - I plan on burning some green earth to make brown -have you ever done this? I want a dark brown/green lighter than raw umber.
Raw Umber from Cyprus
Some other bits and pieces - all from Kremer.
I don't know how many will end up in my final pallette.
I decided not to buy a muller - I'll stick to my autobody putty scrapers (the good, springy, German ones) on frosted sheet of glass
Any "been there, done that" ????