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

    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

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

    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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