rpchristian
Aluminum
- Joined
- Jan 11, 2012
- Location
- Sheffield, England
I have a bag a prussian blue powder and a bottle of ethanol. What is the best recipe for making marking-out blue? What ratio of blue to alcohol?
Richard
Richard
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Easy to use and the blue is good and dries very quickly. I just can't bring to mind the makers name but I can find out for you.
Depending on the size of work you are doing you can buy a sort of magic marker style pen these days. We buy them all the time, the tip is about 3/4" by 1/4" wide and the tube is about 5" by 1". They're specially made for marking out. Obviously they're not made for large castings but for small work and erasing in-correct lines on large work they're fantastic. Easy to use and the blue is good and dries very quickly. I just can't bring to mind the makers name but I can find out for you.
Regards Tyrone.
He's in England. He will want the drying one for doing layout and scribing work on. Ethanol and blue powder. The problem is, once the alcohol evaporates, there's nothing to hold the pigment on. Nothing to stick it to the metal.
Its almost before my time, but I recall old guys mixing there own with methylated spirits. (Denaturated. Alcohol in the U.S) shellac flakes, and powder to make a kind of varnish, that would stick and hold once the fluid dried off. Don't recall the recipe, it was just a splash of this with a splash of that until you were happy with it.
Can you even buy shellac flakes anymore. I could be wrong but I think the non drying / scraping blue is called Engineers Blue in the U.K
Regards Phil.
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