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Re: Grenadilla Oil from Doctor's Products

Author: L. Omar Henderson
Date: 2007-08-23 10:36

(Disclaimer, I am the maker of Grenad-Oil and Bore Doctor)
Jack, an explanation from Wikipedia: Vapor pressure is the pressure of a vapor in equilibrium with its non-vapor phases. All solids and liquids have a tendency to evaporate to a gaseous form, and all gases have a tendency to condense back. At any given temperature, for a particular substance, there is a partial pressure at which the gas of that substance is in dynamic equilibrium with its liquid or solid forms. This is the vapor pressure of that substance at that temperature.

The ingredients in Bore Doctor and Grenad-Oil are primarily (97.4% for Grenad-Oil) fatty acids which make up a plant derived oil. This oil has a low vapor pressure which means that it evaporates very slowly at room temperature. Short chain carbon substances will have a high vapor pressure (the volatile organic compounds in some petroleum products) and will evaporate quickly. Some petroleum based bore oils contain VOCs and give the impression that they are being absorbed but in reality they are turning into gas and evaporating.

At moderate room temperature both Bore Doctor and Grenad-Oil are absorbed into the wood and the disappearance is not due to evaporation. The fatty acid make up of Grenadilla-Oil is unique in the plant oil group and has a large content of poly-unsaturated fatty acids, which in my experience penetrate wood much more quickly than saturated fatty acids (just an experimental observation - I have some theories but these are beyond the scope of this post)

Absorption into the wood is very different event than going away because of evaporation as you suggest. Both Bore Doctor and Grenad-Oil are absorbed into wood quickly, most petroleum based bore oils are not.
L. Omar Henderson
www.doctorsprod.com

Post Edited (2007-08-23 23:41)

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