Linseed oil that is "boiled" is flax oil that has had "Japan Dryers" added to 
make it dry when used in the wood staining/painting/Art trades;and is 
poisonous.Why it is called boiled I can't remember now;so long ago.
As a teen-ager I can remember the folks getting the un-boiled Linseed oil from 
the store to use internally.
Harold
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