Matisse Impasto is a full-bodied texture paste and modelling compound, free of colour pigmentation. Although Matisse Impasto is not fully transparent when dry, there is very little visual colour-loss when mixing and the richness will not be altered in any substantial way.
Drying to a low, subdued sheen and with a very open matrix, Matisse Impasto has the major benefit of allowing all the water to evaporate while losing less volume on drying.