The clothes are stained with blood, how to clean them?

After getting blood stains, wash them with cold water immediately (never use hot water, because blood will solidify when heated), and then remove them with soap.

If the blood stains have solidified into old traces, they should be soaked in cold water for a long time, then washed with water to remove the dirt on the surface, and then soaked and washed with enzyme washing powder. Then use 10% ~ 15% oxalic acid solution to scrub 1 ~ 2 minutes, and then wash with clear water to completely remove stains. )?

For old blood stains, you can also soak them in cold water for a long time. After scrubbing, wipe the contaminated area with 10% tartaric acid solution or 10% ammonia water. Finally, wash with clear water.