This blog seems to be partly about art materials. I tried the Holbein acrylic gouache, and my old traditional gouache tubes of yore, and this is my report from the front: The white acrylic gouache is wimpy and it's probably better to mask a white area, or use white opaque ink, or gesso. The acrylic gouache dries to a nice matte surface that does not need a fixative, so a big yay on that. It also doesn't crack and you can use it on many materials. The traditional gouache is harder to use, because it has a fragile, water soluble surface, but... then on the palette it can be rehydrated and there is less waste of paint. Overall, I like the look of both, and they can be mixed with other water media... you'll have to decide if you need fixative. (this has been a public service announcement!)