Casein: A milk protein used as a binder for casein colours. It is prepared by drying the curd from sour milk, then grinding it into a yellowish powder. Casein is only water-soluble in the presence of an alkali such as ammonia, thus casein paints once dry are waterproof. A type of milk curd glue was used by the Egyptians, Greeks and Romans. It has also served as an adhesive for joining the planks of a panel.

 

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Casein: A milk protein used as a binder for casein colours. It is prepared by drying the curd from sour milk, then grinding it into a yellowish powder. Casein is only water-soluble in the presence o . . . View Full Definition

Tempera: Broadly put this term implies using pigments which are mixed with substances such as; egg white, the whole egg, egg yolk, casein, glue and gelatine. In the specialized sense it means the tru . . . View Full Definition

Pastels: A method of painting or drawing with sticks of dry colour which have the minimum of binder; a reason why pastel pictures keep their bright fresh look almost indefinitely. The main danger for . . . View Full Definition

Fresco: An art started by Minoan and other early civilizations. In antiquity they had the idea of painting fairly small portable frescoes. Some of these have been found in Crete and date from about . . . View Full Definition