Linseed oil historically is the most common drying oil used in painting. It dries fast and creates the strongest flexible surface. Chelsea Classical Studio Linseed Oil Pale Cold-Pressed™ is extracted using the time-tested method of cold-pressing oils. Cold-pressed oils are obtained by pressing and grinding seeds in a stone or metal press. This historical extraction technique yields less oil than using heat or chemical methods; traditionally it was preferred in order to have a purer oil. This method follows historic precedent by using the most natural oil and extraction processes. Raw cold-pressed oils have a dark yellow-orange color that can affect paint color. To make the oil lighter in color, CCS Linseed Oil Pale Cold-Pressed is washed and cleaned using natural processes documented since the Renaissance, without harsh chemical cleaning and bleaching.