Originally Posted by Brian Firth
Yes, you can mix gouache and acrylics. However, certain gouache colors, mainly pinks and violets, can react with the alkaline acrylic. You just need to test the colors mixtures before applying them. Any mixture that gets thick and lumpy is having a reaction. Winsor and Newton have information on this on their website under the Gouache section, download the "general" article and look at the "making gouache waterproof" section.
Thanks for that Brian, good info.
This should become obvious when you try it Becca but when using an insoluble medium like acrylic with a soluble medium like gouache any direct mixtures of the two tend to have a blend of the working properties. In short: if the mixture is mostly acrylic it'll still be waterproof; if the mixture has more gouache in it it'll tend to be soluble when dry. So you may need to factor this in when working in layers or on adjacent areas.
Originally Posted by dhinky
can you please explain to me, what gouchew is...
Amy, gouache is basically opaque watercolour.
If you see a reference to bodycolour in older books or in relation to older works ("Watercolour with bodycolour" in the description of a painting) it often means the same thing.