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Old 07 July 2008, 05:45   #8
Join Date: Aug 2006
Location: Argentina
Age: 45
Posts: 648
h2o2 also is used to bleach teeth but is applied in a format of gel instead liquid....a laser light is used as accelerator of the process

btw, concentrations up to 10% is used as medical product to disinfect and 20 % is used very often by some elderly women to tint I don't believe that 20 % will be so dangerous....precautions about use gloves and lens is really exaggerated

Last edited by laser; 07 July 2008 at 08:00.
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