You can also determine what watercolors are transparent by downloading color charts from brand-name watercolor paint companies. You can also borrow a copy from your local public library. But, you can buy it from used book dealers on Amazon.
However, both editions are no longer in print. They republished it in paperback on April 15, 2000.
I first learned which watercolor paints are transparent by reading Jim Kosvanec’s book, “Transparent Watercolor Wheel: A Logical and Easy-to-use System for Taking the Guesswork out of Mixing Colours” (affiliate link) first published by Watson-Guptill on May 1, 1994.
