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What is happening with my tin eyeshadow pans?
so I noticed this after 24hours had passed. I pressed them with rubbing alcohol, could that be reacting to the metal? What would be a sufficient subistute?
I have a powder press coming so perhaps I can just dry press with my oil binder?
http://i63.tinypic.com/14y3fde.jpg -
5 Replies
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rust.
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it looks like corrosion
the rubbing alcohol has most likely attacked the protective air-tight lacquer on the surface of the tin; try using a chemically different binder, e.g. isododecane
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Almost all companies dry press their pressed powders. You also might want to look into using both a dry binder and an oil binder at the same time.
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I figured out what was happened. The arrowroot I use as an additive was absorbing and preventing the full evaporation of the liquid. I made a separate formula for pressing and have since then started dry pressing using oil that’s been “cut” (like butter into flour)
Grape seed is what I prefer to use because it disperses better.I am super excited to be getting this 1/2 ton powder press this coming week. Dry pressing will be so much easier
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Dry binders to try include soaps like Aluminum, Calcium, Magnesium, or Zinc Stearate; finely powdered plastics like polyethylene, nylon, teflon or polylactic acid; and “natural” materials like cellulose, silk, or carnauba wax.
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