Know how to buy colors at the store

while there are several fact in this there are a lot of opinions as well (namely my distrust on several brands marketing strategies, and my opinion that’s better to start with cheap student quality stuff. LOTS of people disagree on that point)  that you should take as what they are: personal opinions. this is the result of several years of research on creating a cheap but high quality palette that would help me. 

other things to know: pigments are generally more resistant in oil and acrylics than they are in watercolor. but there are a couple of pigments that work well in watercolor but really badly in oil.

resources
pigments through the ages
a comprehensive guide to watercolor pigments and a lot of tests on popular brands
about van gogh's bedroom
Blue and Yellow don't make green by Michael Wilcox

rebloggable post on tumblr