Of that such a priming coat permitted most of the oil to be drawn into the porous wood, leaving only an oil poor pigment on the surface. This inelastic, oil-drained film became brittle and offered but little resistance to the elements.
The problem, then, was one of obtaining a primer that would not penetrate excessively, thus retaining sufficient elasticity to be durable and resist moisture.
The solution came from the development of Vitolized Oil in the Research Laboratories
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