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I've heard that due to OHSA in California the process does not work very well any longer...meaning that the chroming does not take as well...
Any thoughts out there? /ubbthreads/images/graemlins/savewave.gif
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Hi Henri,
You may well be correct, from what little I know of your state's regulations.
I think there are two main chroming processes used for decorative/protective chrome. The old standby, hexavalent chrome (chromium 6), has come increasingly under fire because of it's environmental - toxic properties during the process. The processing is heavily monitored & controlled by the authorities. It is very bright & sometimes considered to have a bluish tinge.
Trivalent chrome (chromium 3), is considered to be much less toxic although still a heavily monitored process. It is usually less durable, has less brilliance, & sometimes has a more yellowish tinge.
It may well be that trivalent is the only choice available in your state, or maybe, most states. You will need to check around.
Both processes if done the right way, consist of a heavy copper plate that is buffed to remove surface irregularities, an intermediate coat of nickel that is buffed to give shine, & a very thin protective coat of chrome.
D