Abstract: This invention is related to making oil paint mediums or varnishes by heating purified linseed or similar oils sufficiently to cause gelling, either with or without catalysts or additives. After sufficient heating, the oil remains a heated liquid, but with the capabilities of becoming a gel at reduced temperatures. Solvent is added and is mixed into the liquid, potential gel, until it becomes a solution. This cooled solution maintains the capabilities to gel, but gelling is then delayed until the solvent evaporates during use.