Wet Method Colored Nonfluorescent Magnetic Particles
7C Black is a highly-sensitive magnetic particle powder for nonfluorescent (visible) wet method magnetic particle testing. Particle suspensions prepared with 7C Black provide clear, strong indications and are ideal for locating fine and medium discontinuities on finished parts.
7C Black can be mixed with water or oil and used to find inclusions, seams, shrink cracks, tears, laps, flakes, welding defects, grinding cracks, quenching cracks, fatigue cracks and other defects.
Use with WCP-2 white contrast paint to improve to improve probability of detection and sensitivity.
Container Size & Part Number
8 lb / 3.62 kg pail 01-1116-66
Defect location: surface and slightly subsurface
- Reflective or light-colored surfaces
- Detecting fine and medium discontinuities
- Field testing
- Spot inspections
- In-service inspections
- Machined parts
- Light surfaces
- Difficult to reach areas
- Shrink cracks
- Welding defects
- Grinding cracks
- Quenching cracks
- Fatigue cracks
NDT Method: Magnetic Particle Testing, Nonfluorescent / Visible, Wet Method
Suspension Vehicle: Water or petroleum distillate (oil)
Required Equipment: Magnetizing device
Temperature Range: 32 to 165°F / 0 to 74°C