Kaylen has a good point. I find that no pigment is indispensable, and more so if it is in short supply. If he pays premium price, just go ahead and get his address…….!!! (really, I mean it! Just hope he’s not reading this!)

But, if you don’t want to heed my advice, here’s some more advice (on how to make watercolors) https://www.wetcanvas.com/forums/showthread.php?t=1422368
(I have posted more, but you’ll have to search)

I’ve been looking into making my own paints for a while – this is what i know so far:
You need a glass muller and a sheet of glass for “milling” the paint mixture thoroughly (spreading the paint mix in a thin film to make sure pigment particles get coated in vehicle properly). Gum arabic, glycerine and ox gall at the very least as ingredients. Ox gall is particularly important since you’re mixing a small particle stainer. The pigment to vehicle ratio for small particle pigments (like quinacridones) is 20% – 1 part pigment to 4 parts vehicle. To get more specific proportions of gum arabic/glycerine + other suff have a look here (scroll down):

https://www.handprint.com/HP/WCL/pigmt1.html

Here is a link for a muller (it’s quite an investment but there’s no other way to mix):

https://www.jacksonsart.com/jackson-s-long-handle-glass-muller-9cm-diameter?channable=e17573.MTI5MTE4&___store=jacksonsart_en&gclid=EAIaIQobChMIkMaOhdqJ3gIVz7ztCh0CTAgsEAQYAiABEgLDTfD_BwE

It’s recommended use a dust mask when handling the dry pigment in the open.

Good luck and let us know how it goes!

You can try to mill some common pigments(for example Prussian blue or earths) first~! You can gain some experience from these cheaper materials before the milling of valuable PO49 paint.

I have some glass weights for fermenting,,,https://www.amazon.com/Glass-Fermentation-Weights-Mouth-4-Pack/dp/B01K7YRO84/ref=sr_1_5?ie=UTF8&qid=1539662555&sr=8-5&keywords=glass+weights+for+fermenting Ill try those

If you bought a pigment dispersion from Guerra Paint, all you need to add is a couple drops of gum arabic solution after you put a few drops of the pigment dispersion in your palette. It will stick to your paper just fine. I have done this for a long time. I haven’t bothered with the dry pigments.