Acryla gouache contains acrylic, so it behaves differently. First and most importantly, when dry it is not water-soluble. So it makes a perfect first layer or under-painting , where a permanent surface is desired. Regular gouache remains water-soluble even when dry. The acrylic also enables you to thin it with gel medium, as you would any acrylic. Regular gouache can be thinned with water, but the opacity is what most artists want. You can mix them together but you’re losing the best properties of each, so I don’t recommend that you do that. They brush out slightly differently too; regular gouache responds differently to the brush than the Acryla. You will like the bigger tubes of Holbein Acryla however, and the large range of colors. Leftover regular gouache on the palette can be re-wetted the next day, but you will notice it’s more transparent, but Acryla is permanent.
