Contact Form


Please fill all fields marked with *


Non Destructive Testing // Magnetic Particles

Yellow Powder No. 6
Yellow Magnetic Dusting Powder
  • Particles are easily agitated, fast acting and produce defined indications
  • Particles meet specification requirements
  • Can be used with both stationary and portable magnetic test equipment
  • Can be used at elevated temperatures
  • The yellow colour gives a clear contrasting colour to backgrounds


DUBL-CHEK Yellow Powder No.6 is a highly refined non-fluorescent yellow magnetic powder used for dry method magnetic particle inspection. It is designed to be used in visible light to reveal discontinuities. The particles respond to magnetic leakage fields created by discontinuities in ferromagnetic material. Particles rapidly collect at leakage fields producing red indications.

Specifications Compliance

• ASTM E-1444
• AMS 3040
• MIL-STD-271
• NAVSEA 250-1500-1
• NTR-1E

Physical Properties

Particle Colour: Yellow
Specific Gravity: 2.5 – 3.0 g/ml
Particle Size: 15 – 160 µm (average 75µm)
Sensitivity: 8 lines on an AISI Ketos tool steel ring
Temperature Limits: 427ºC


1. Clean the test surface and allow it to dry.
2. Apply Yellow Powder No. 6 to the part with a powder spray bulb or powder blower.
3. Magnetise the area to be inspected.
4. As the current is being applied, dust the powder over the part. If excessive powder is visible, gently blow the extra powder off.
5. Inspect the surface under visible light.
6. Collections of particles will reveal discontinuities at the leakage fields.
7. Clean and repeat the process; changing the orientation of the magnetising direction.

Ordering Info

1555/10LBS 4.5kg
1555/50LBS 22.5kgs (5.9 gallons)