Method C: Visible Penetrant Solvent-Removable (Wipe-Off)

Guide to Method C processing per ASTM E-1417.

1. Pre Clean The Surface

Use Met-L-Chek® E-59A, R-503 or R-504 to remove oil, grease and other contaminants from the test surface. Part must be clean, dry, and at a temperature of 40-125°F (4.4-52°C) before penetrant is applied.

Products to Use: 

E-59A, R-503, R-504:

2. Apply Penetrant

Apply Met-L-Chek® penetrant using spray, immersion, or wipe on. Wait a minimum of 10 minutes; 20 minutes if temperature is between 40-50°F (4.4-10°C) before proceeding to the next step.

Products to Use:

VP-30, VBP-300

3. Removal

Moisten cloth with Met-L-Chek® remover and wipe penetrant from surface. Do not spray remover on surface to remove penetrant, as sensitivity will be impaired.

Products to Use:

E-59, E-59A, R-502, R-503, R-504:

4. Apply Developer

Apply non-aqueous Met-L-Chek® developer.

Products to Use: 

D-70, D-702:

5. Inspect

Wait a minimum of 10 minutes before inspection. Use illumination of > 100 foot candles (>1100 lux/m2) to inspect.