I have read some interesting methods for removing
blood, from old stains to new.
Here are a few:
1. If you get a paper cut at work and a drop gets on your cloths, immediately moisten the spot with your own saliva, then blot with a clean cloth or paper towel. This prevents the stain from setting before you get home. Saliva contains digestive enzymes that break down protein. The protein in blood is what makes it hard to remove.
2. Add a generous splash of ammonia to a sinkful of cold water (hot water will set the stain). Immerse the clothing in the solution and soak for 30 minutes. Then rinse with cold water. You may need to than scrub the area a bit with dishwashing liquid but the ammonia will eliminate most of the stain.
3. To wash a bloodstain that was not treated right away, (especially on white or bright colors), soak the stain in milk before putting it in the washing machine.
4. Bloodstains should be treated right away. To prevent more work later, immediately soak the stain in 1 cup of water with 1/2 tspn of salt.