- Clipping hairs with a small pair of facial scissors is an option for women with few unwanted hairs. - Chemical depilatories (hair removal creams) are another option for hair removal. However, their major drawback is that many individuals find them too irritating to the skin. Bleaching creams may be used to camouflage hair instead of actually removing the hair.
Black oxide is a conversion coating formed by a chemical reaction produced when parts are immersed in the alkaline aqueous salt solution operated at approximately 285 degrees F. The reaction between the iron of the ferrous alloy and the hot oxide bath produces a magnitite (Fe3 O4) on the actual surface of the part.
This compound is not always an acceptable substitute for black oxide as it does not look as nice, and can tend to be very smutty (easily rub off onto hands and clothes). There are dozens of on-line letters here related to black oxide and cold blackening. Here is a partial list of some of the early ones: 1  531. 2  Black Oxide Specifications. 3  854. Black oxide-cold method vs. hot method. 4  1150.