Rinsing blood with clear water can only clean the platelets and cannot completely remove the DNA substances or protein substances present in the blood.
To put it simply, rinsing blood with clear water only washes away the color, making it seem like there's no blood on the surface, but certain substances in the blood still remain on the carrier.
To completely remove blood stains, you need to use some special cleaning substances.
This special cleaning agent is not single, but a mixed cleaning agent.
In most cases, ordinary detergent mixed with protease, and some clear water, can fairly thoroughly remove the residual traces of blood.
The reason for adding protease is that the blood contains a large amount of protein substances, which is how we can detect DNA information in the blood.
Using protease can effectively decompose the protein substances in the blood.
