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Star Reloaders / Re: ALUMINUM POWDER MEASURE
« on: March 03, 2011, 11:17:35 pm »
And,,, anodizing is done in a sulfuric acid bath. The oxide coating is initially very porous. When it is in this state it can absorb dies such as the red and gold of some Star powder magazines, but also black and many other colors. The final step is a hot water bath that seals the oxide coating and makes it hard and corrosion resistant.