Why is it easier to wash bloodied clothes with cold water?

Discussion in 'Chemistry' started by Syzygys, Dec 7, 2009.

  1. Syzygys As a mother, I am telling you Valued Senior Member

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    12,662
    Maybe warm water helps the still not completely dry blood to stick to the surface? Also how does the salt help the cause? (red wine on a dinner tablecloth)

    Edit: google says hot water will set the stain. Well, I knew that, what I want to know what exactly happens chemically that makes setting easier with warm water?
     
    Last edited: Dec 7, 2009
  2. S.A.M. uniquely dreadful Valued Senior Member

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    72,822
    Because heat hardens proteins [denaturation] and makes them less soluble?
     
  3. Fraggle Rocker Staff Member

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    22,737
    Exactly. Drop an egg on your shirt and let it soak in. You can probably get it out with some energetic hand-washing. But put the shirt in the microwave and cook the egg protein, and getting it clean will be a real project.
     

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