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Homemade layout fluid

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mcostello:
I use copper sulphate on a job with lots of grinding as it holds up to heat better.

krv3000:
brill

fatal-exception:
So where does Methyl Hydrate fall into the alcohols discussion? I've been mixing shellac with this for a few years now with success. It's available pretty much everywhere in Canada. Gotta keep our fishing huts warm in the winter ya know!  :thumbup:

You can color shellac pretty easily with a variety of different dyes that are commonly available. TransTint is one brand name that comes to mind, it can be bought in liquid form. I'm sure that I've also used powered dyes from Lee Valley in the past also. I think with the correct amount of dye to shellac to alcohol, it would make a durable layout fluid as the OP suggests.

NormanV:
I have just read this in a copy of "Model Engineer" from December 1981.

vtsteam:
I like this last one best Norman -- great find! Sorry I missed this thread earlier.

For readily available materials, here in the U.S., that means a ball point pen, liquid shellac, and denatured alcohol (shellac thinner) will do the job. The last two are available in every hardware or paint store here. I have both on hand for woodwork, including pattern making, anyway.

Dry Prussian blue pigment, while available in specialty city art stores, is not something locatable in my town, and probably not cheaper or easier to obtain than Dykem.

Prussian blue in tubes of oil paints is locally available, but also expensive. I'm not sure how well it would mix, or how quickly it would dry in alcohol. Probably not as well on either count.

Prussian blue oil paint It will work in a pinch as a spotting marker for scraping, but not as well (it's paler and dries more quickly) as the "real" thing -- I've used both.

Norman's find....a used ballpoint pen tube? Found everywhere, free. That's the kind of tip I really love.

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