Diamond Enthusiast

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Diamond Enthusiast

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Believe it of not, the answer to this question involves quantum mechanics. Basically, quantum mechanics causes there to be set levels of energy that electrons within molecules can have. When they drop down an energy level, they release energy. In dyes and stains, this energy is in the form of visible light. These electrons also hold the molecule together. Oxidizing agents (such as oxygen and bleach) break these bonds by removing some electrons. By breaking the bonds, the energy levels are changed to ones that aren't separated by the right energy to emit light.
The difference between chlorine bleach and color-safe bleach is simply a matter of how strong of an oxidizing agent the bleach is. Chlorine bleach is strong enough to break the bonds in both stains and dyes. Color-safe bleaches are strong enough to break the bonds in most stains, but not strong enough to break the bonds in most dyes.
While chloring bleaches contain sodium hypochlorite (NaClO), many color-safe bleaches contain sodium perborate(NaBO2·H2O2·H2O)
[This message was edited by methos5000 on 08-25-03 at 09:38 AM.]
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Diamond Enthusiast


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Wow, Methos REALLY GREAT answer. I learned something new. 
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Diamond Enthusiast

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Mixing bleach and ammonia can also create chloramines (NH2Cl, NHCl2, and NCl3) none of which are particularly friendly chemicals.
As for why bleach isn't sold in more dilute forms, I imagine it has to do with shipping costs. Although the extra water the companies would have to add wouldn't cost them much, shipping that water all over the country would cost a significant amount. It is cheaper for them to ship a fairly concentrated solution to you, and then let you dilute it.
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