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A more direct measurement of an oil’s ability to polymerize is its iodine value. In a nutshell, this measures how much iodine an oil can absorb, which in turn is an indication of how many bonding sites are available for polymerization.

Now, you’re certainly heading down the right path with linseed oil, with an iodine value of around 185. Fish oils like sardine are up there too. (I’m sure you’ve heard that oily fish like salmon and sardines are rich in omega-3s.) The best oil available for cheap at any grocery store is soybean oil, with an iodine value around 130.

A couple links:
January 30, 2010, 9:24 pm
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