Are some Linseed oils better quality that others?

From;


http://www.paintmaking.com


Cold pressed Linseed oil The best grinding oil


By far the best oil for grinding pigments into it has many advantages. It has a high acid number which imparts desirable qualities. Firstly it is more stable as to color. Just because an oil has a certain color when new and liquid does not mean that it will remain so throughout its life as a dried paint film. Cold Pressed oil seems to be particularly stable in this regard. It also produces a more flexible and durable paint film. When grinding it has superior wetting power. It should be first choice for making paint in the studio. There are two types on the market, distinguished by their origins.





Cold Pressed in a windmill on stone mills


This type is the most like the oil used by the old masters. It is also the least efficient method possible and consequently is the most costly oil. I am only aware of one company selling it Old Holland, which claims to be the oldest paint manufacturer in the world and the only one using the oldest techniques of manufacture. Their Linseed Oil from the windmill is noticeably different from all other oils including the industrially produced Cold Pressed oils.





Industrially Cold Pressed Linseed Oil.


Other brands of Cold Pressed Linseed Oil on the market are noticeably lighter and I have no reason to believe they are in any way inferior to the windmill Cold Pressed oil. It is generally easy to obtain from all major artist's supply stores.





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