Cobalt Drier unit:each Self-portrait studies become genuinely productive

Self-portrait studies become genuinely productive when students can glance up

Simply position your inked block

Whether you're protecting student brushes during weekly classes or safeguarding professional synthetics between plein air sessions

lower settings work for gentle surface fusion

Cobalt Drier unit:each Self-portrait studies become genuinely productiveOil paintings often need to dry between layers, and waiting days for each stage can stall momentum on a piece. Grumbacher Cobalt Drier accelerates the oxidation process that cures oil paint, reducing drying times so you can continue working sooner. Traditional cobalt formulation works reliably across different oil paint brands and pigments, though drying acceleration varies with paint thickness and environmental conditions. Add sparingly, a few drops