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The casein paint is permeable and not washable. Very stable and with good hiding power, it becomes opaque after drying.
It has been used for centuries to embellish and sustainably protect the woodwork, furniture or walls, and applies to all mineral substrates, plasters, plasterboard and old unpainted paints. Be careful not to use it in damp rooms.
Basic recipe :
1) In a small bucket or saucepan, pour 2 liters of water; Whisk together 300 g of casein to dissolve any lumps.
Casein is also traditionally used as a fixing aid for lime paints in the proportion of 5 to 10% by weight of lime. It provides better grip. It also allows, mixed with water and pigments (glazes), to fix rather frank colors on a plaster or a lime paint that has already made its decision.
For more complete recipes, we recommend the following books (non-exhaustive list)