GUIDE to METHOD “A” (water washable) PROCESSING per ASTM E-1417-05
Part must be clean, dry and at a temperature of 4.4° -52°C (40° - 125°F) before penetrant is applied.
Use Cee-Bee® # 210 or 300LF aqueous alkaline degreaser; immersion or spray application.
Use Pen-Chek® E-59A, R-503 or R-504 solvent cleaners for spot inspection cleaning applications.
APPLY Pen-Chek® TYPE I or TYPE II PENETRANTS (Method A)
Use spray, immersion, or wipe on application.
Wait a minimum of 10 minutes; 20 minutes if temperature is 4.4°-10°C (40-50°F).
Reapply penetrant if dwell is over 2 hours to prevent drying out prior to removal.
Water temperature 10°-38°C (50°-100 °F). Water pressure < 275kPa (< 40 psi); if a hydro-air nozzle use limit
pressure to < 172kPa (<25 psi). Distance >30cm (>12 inches).
Time- only long enough to remove surface fluorescence under UV-A or color under bright visible light.
DRY or APPLY AQUEOUS DEVELOPER (form c)
Temperature <71 °C (<160 °F) Immersion, flow on, or spray.
Time- only long enough to dry surface Pen-Chek D-78B
APPLY NONAQUEOUS (forms “d” or “e”) or DRY
DRY DEVELOPER (form “a” Type I only) Temperature <71 °C (<160 °F)
Pen-Chek® D-70 or D-72A (Type I only) Time- only long enough to dry surface
Wait a minimum of 10 minutes before inspection. Maximum time is 1 hour for forms “d & e” (nonaqueous),
maximum 2 hours for form “c” (aqueous), and maximum 4 hours for form “a” (dry powder).
If times are exceeded, clean part and reprocess.
For fluorescent Type I penetrants use UV-A illumination of >1000 μw/cm2 @ 15inches (38.1 cm) in a
darkened area of <21 lux visible light (<2 foot candles).
For visible Type II penetrants use lighting of 1100 lux/m2 (100 footcandles) minimum.