Not all of them are dry. They have a line of pigment concentrate dispersions. They call them "color paste". They're either aqueous or glycol dispersions, depending on the pigment.

Synthetic Organic Pigments:
http://kremerpigments.com/shopus/ind...&list=01030103

Mineral Pigments:
http://kremerpigments.com/shopus/ind...NG&list=010105

Thinking about trying at least the lamp black once I run out of watercolor. $9 for 75 grams ($25 for 250g / $60 for 1kg and you're set for life!)

--Greg