Oil colour mediums / Sennelier
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In brief, the Courtrai drier makes the oil «hyperventilate» to demand more oxygen and accelerate the hardening of the layers of paint.
Contains calcium and zirconium salts. Greater drying power than White drier. Dries the oil in-depth. Reduces the difference that naturally exists between the normal drying nature of most colors and the slow drying tendency of certain other colors. May be mixed directly with the oil color (2% maximum) or thinner, adding several drops (5 maximum) per 5 ml. An excess of drier impairs drying quality and therefore the paint film.
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