Рет қаралды 638
The first paste is made of 100g of pigment + 17g of linseed oil. It exhibits a yield stress and a little elasticity. It is almost a pseudoplastic paint. The second paste is made of 100g of pigment + 19,3g of linseed oil. When shear force is removed, it still flows during a little time when high impasto peaks fall, and paint undergoes a little leveling. In the painter's vocabulary, the first paint is "short" and the second is "long".
The pigment tested here is PW18 "blanc de Meudon". It is used as a filler and a rheology modifier. These pastes can be added in small amounts to pure paint and ground again to obtain different rheological behavior.
Both pastes have been mixed in a mortar with pestle and then finely handground under a muller on a heavy slab.