To remove old blood stains, brush off the dried blood, soak the garment in a mixture of cool water and laundry detergent, pretreat the stains, and wash the garment as normal. Finally, air dry the garment, and inspect the results.
- Brush off the dried blood
Use a soft brush or old toothbrush to gently brush the dried blood off the fabric.
- Soak the garment
Mix cool water and laundry detergent containing enzymes into a bucket. Soak the garment in the solution for at least 30 minutes. Leave the garment overnight for larger stains.
- Pretreat the stains
Remove the garment from the solution, and apply a laundry stain remover directly on the blood stains. Allow the stain remover to sit for at least 30 minutes before proceeding.
- Wash the garment
Wash the garment as normal. Use a small amount of chlorine bleach in the water. Substitute with oxygen bleach if the fabric is colored or doesn't allow you to use chlorine bleach.
- Air dry the garment
Allow the garment to air dry after washing, as some stains only become visible after the clothes are dry. Using a dryer can cause remaining stains to set, making them almost impossible to remove. Inspect the garment after it is completely dry, and repeat the entire process if there are any blood stains left on the garment.