Matisse Flow Formula Acrylic Paint has all the attributes of the Structure Formula, however it has thinner viscosity to allow free flowing brushstrokes or use through an airbrush. Highly suited for mural work, theatre backdrops, geometrics, hard edge, photo realism, air-brushing and watercolour techniques can be simulated quite easily. Matisse Flow Formula Acrylic Paints are compatible with all Matisse Mediums. For matt velvet effects, add MM5 Matt Medium. For buttering up the paint, add MM2 Impasto Medium. Matisse Flow Formula Acrylic Paint dries water-resistant but an addition of MM8 Spreader Medium will increase its water-sensitivity for watercolour effects. MM1 Drying Retarder does the same but also slows drying and film formation. By adding MM5 Matt Medium it becomes an excellent designers' paint, ideal for flat areas of colour and for work to be photographed. Matisse Flow Formula Acrylic Paints are vegan friendly (except Ivory Black).