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7C Black Non-Fluorescent Particles - 25 Lb

7C Black Non-Fluorescent Particles - 25 Lb

SKU: SKU:01-1116-81

Stock Status: Available in 7 - 10 business days
Regular price $799.00 USD
Regular price Sale price $799.00 USD
Sale Sold out

Magnaflux 7C 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.


  • Clear indications under visible light
  • Heavy particle buildup for quick detection
  • Can be suspended in water or petroleum distillate (oil) vehicle
  • Great particle mobility


  • AMS 3042
  • ASTM E709
  • ASTM E1444
  • ASME
  • ISO 9934
  • MIL-STD-271
  • MIL-STD-2132
  • NAVSEA 250-1500-1
  • NAVSEA T9074-AS-GIB-010/271


Defect location: surface and slightly subsurface

Ideal for:

  • 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

Defect examples:

  • Inclusions
  • Seams
  • Shrink cracks
  • Tears
  • Laps
  • Flakes
  • Welding defects
  • Grinding cracks
  • Quenching cracks
  • Fatigue cracks

Use Recommendations

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

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