In January, 2015, I made swatches of the 48 colors in the Charvin Water Soluble Pastel Painting Sticks set, and cut the strips down the center. I put half of each strip by a south-facing window of my studio, and the other half wrapped up in a dark closet. In another month, it will have been five years since I started the test. By art longevity standards, five years is not a long time.
In case you're not sure which pastels I'm referring to, above is a photo of the set. Here is a link to them on the Jerrys website. They claim to be pure pigment and lightfast. They are certainly well priced! As you can see in the image below, the colors are rated by the manufacturer, some as "**** Excellent" and some as "***Good". But if you know me, you know I often need to prove things for
