What is the recommended practice to prevent cross contamination of abrasives?

• A. Reuse same abrasive on different materials
• B. Label and segregate abrasives for each material
• C. Rinse abrasives with water and reuse
• D. Not use abrasives used for other materials/mark it as only

Answer: (C)

Keeping abrasives dedicated to each material is essential to prevent cross contamination. Different materials require different grit sizes and bonding to achieve the right finish, and residues from one material can stick to the abrasive and transfer to the next part, causing scratches, contamination, or poor surface quality. Rinsing and reusing abrasives doesn’t reliably remove embedded particles and can carry contaminants into future work. The best practice is to label and segregate abrasives for each material, keeping separate containers and clearly marking them, so you always select the appropriate abrasive for the material being worked on.