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Old 10-17-2016, 12:01 AM   #1
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greetings... new to forums, new to this site, typing with opposed thumbs. studying for Level 2 of my painting and decorating apprenticeship - long day, 10 hours, 132 pages of technical writing and 8 sets of questionnaires, but i really needed to have a grasp on what differentiates lacquer and varnish other than spraying one and brushing the other, hence... be prepared for other head-scratchers of this calibre. you have been warned...
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Old 10-17-2016, 08:40 AM   #2
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Right off the bat, one of the things that differentiates them is one requires a converter (catalyst) and the other doesn't. Although, I believe varnish requires oxidation for curing. To put it simply, there are coatings that chemically cure, and there are those that form a film by evaporation. I would categorize varnish under the latter,.
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Old 10-17-2016, 11:00 AM   #3
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I posted a great link that explains this very well but for some reason it wont take you there.

Lacquers are always rewettable in their own solvents and dry by evaporation leaving a film. Once the solvents are gone its done for the most part. Varnish does not. Once the solvents are gone the film still has to come to full cure by oxidation or cross linking. Water base is a different story yet.

Which is better is another question that depends on the film properties or what it was made to do.
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Old 10-17-2016, 12:18 PM   #4
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Quote:
Originally Posted by gyusher View Post
I posted a great link that explains this very well but for some reason it wont take you there.

Lacquers are always rewettable in their own solvents and dry by evaporation leaving a film. Once the solvents are gone its done for the most part. Varnish does not. Once the solvents are gone the film still has to come to full cure by oxidation or cross linking. Water base is a different story yet.

Which is better is another question that depends on the film properties or what it was made to do.
Thanks for clarifying that.
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Old 10-17-2016, 01:18 PM   #5
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http://www.doityourself.com/stry/wha...sh-and-lacquer
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Old 02-17-2017, 02:40 AM   #6
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Greatings earthling
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