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Old 29-06-2012, 05:17 PM
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sopticals (Stephen)
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Join Date: Jun 2010
Location: Oamaru, New Zealand.
Posts: 211

Originally Posted by dave brock View Post
Hi Steve.
If it helps, I've only ever used rosin mixed with Stockholm Tar.

Hi Dave,

where do you get rosin and Stockholm Tar these days?

At the moment I am experimenting, by adding very small quantities of 30 grade motor oil, to a brew I have, of 50/50 Gugolz, #55/#64. Doing incremental tests, by adding a teaspoon plus, to the approximate 1Kg of G, then letting cool, and doing the small coin edge test, to get the right hardness/softness, for my current 5-7deg working area.

The motor oil suggestion, came from a well known mirror maker from the US. My aim to arrive at a mix, equivalent to G#40.

Best regards
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