What is the difference between gouache and Acrylic Gouache?

The main difference with traditional gouache is that acrylic gouache is waterproof and cannot be reactivated. It has its pros and cons. 

Holbein Acryla Gouache Colors School Set Of 12 : Arts, Crafts & Sewing

comparaison

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Holbein Acrylic Gouache 5 Color Mixing Color Set, 20ml, Primary Designer Colors