Eight precautions to be adopted while removing unknown stain are-
1.Remove the stain when fresh
2. Soak the stain in plain cold water.
3.Then soak it in warm soapy water.
4.Bleach the stain by exposing it to sunlight.
5.Treat the stain with diluted alkaline solution.
6.Treat the stain with diluted acid.
7.Apply oxidizing bleach.
8.Apply reducing bleach.
9.Rinse all the chemicals
