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Expert's Corner — Danish Oil & Wiping Varnish Dried on Glass

This is Not Rocket Science

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This is Not Rocket Science

Back in the 1970s and 80s, it was common to see explanations of the difference between Danish oil and wiping varnish described as that between oil and resin-fortified oil. I couldn’t make sense of this explanation because the term “resin” is so vague. It commonly refers to fossilized tree saps such as rosin, copal and amber, and sometimes to synthetic alkyd and polyurethane. So, is one of these resins just added to the oil to “fortify” it, or is something else done? A further confusion is that linseed oil and tung oil are, themselves, sometimes classified as resins. So, is...

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