For the fun of it to merge these two threads I thought I'd relate a story about a situation that arose when I worked as an artist/technical consultant at the the M. Grumbacher Company when its factory was still in Manhattan. (Up until 1987). I was in charge of quality control for our lines of watercolors and acrylics (Hyplar). One of my jobs at the technical end of things was to answer technical questions either phoned in or written (pre-Internet days), regarding the usage of our products. One day, my boss who was the chief chemist, called me into his office and read a letter he said he had received from a somewhat discouraged customer. To wit: our line of Gamma Retouch Colors, which were really specially formulated warm and cool gray gouache colors no longer seemed "quite right" to the customer involved. I thought "perhaps there was an error in the color matching or behavior of a particular paint batch". My boss read on: the fellow said he had been coloring his coffee for years with our Gamma Retouch Colors and things weren't turning out the way the used to. Ergo, this fellow was adding artists paint to his coffee and the preservative for these water borne colors was formalin. So, in effect the guy was slowly embalming himself. But they certainly were vegan colors… the gum tragacanth and gum arabic used as binders were tree based materials. We informed the writer in no uncertain terms that our products were NOT TO BE EATEN. I think my boss personally handled the matter. But I tell you, the paints weren't Cremora® . I wonder whether that fellow also licked his brushes to point them.