Product Data Sheet – TIEDE 690.1

Oil-based Fluorescent Magnetic Ink

TIEDE® 690.1 is an oil-based, ready-to-use fluorescent ink for wet method magnetic particle testing. It gives clear bright yellow/green indications when viewed in a darkened area under UV(A) of peak wavelength 365nm.

Used in conjunction with suitable magnetising equipment, 690.1 will locate medium-fine surface and slightly sub-surface defects.

Chemical product icon - fluorescent magnetic


  • Ready-to-use
  • Clear, bright indications under UV light
  • Low maintenance, oil-based suspension
  • High sensitivity
  • Excellent fluorescent contrast for quick identification and better inspection quality
  • Excellent particle mobility
  • Good dispersion stability
  • Protects parts and equipment against corrosion
  • Great concentration consistency
  • Superior surface wetting
  • Even surface coverage for better detection


Defect location: surface and slightly subsurface

Ideal for:

  • Detecting very fine to fine discontinuities
  • Critical applications
  • After secondary processing
  • In-service inspections
  • High strength alloys

Defect examples:

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


A suspension of magnetic particles in a high-flash, low-odour petroleum distillate.

Specification Compliance

  • AMS2641
  • AMS3044
  • AMS3045
  • AMS3046 (Aerosols only)
  • ASME B & PV Code, Sec V
  • ASTM E709
  • ASTM E1444/E1444M
  • EN ISO 9934-2
  • GOST R ISO 9934-2-2011

Product Properties

Form and colour Brown liquid
Flash point -40°C
SAE sensitivity 8 – 9
Particle size range 3 – 5 µm
Settlement volume (1 hour) 0.1 – 0.2 ml

Like all Magnaflux materials, 690.1 is closely controlled to ensure batch-to-batch consistency, optimum process control and inspection reliability.

User Recommendations

NDT Method
Magnetic Particle Testing, Fluorescent, Wet Method
Storage temperature 10°C to 30°C
Usage temperature -5°C to 50°C
Concentration range 0.4 – 0.9 g/litre
Suspension vehicle MG/MX Carrier II
Magnetic particles 14A, MG 410
Cleaner SKC-S
UV lamps
EV6000, ST700
Centrifuge Tube; MTU No.3 Test Block (EN ISO 9934-2)

Instructions for Use

Clean the component before testing to reduce the risk of contamination and provide a suitable test surface.

Shake the aerosol can to mix the ink thoroughly.

Spray all surfaces of the part while applying a magnetising current. Remember to stop spraying the ink before the current is switched off, otherwise the force of the ink could wash away any indications.

Shake the can regularly during during testing.

After inspection, demagnetise your component before cleaning to ensure easy removal of any particle residue.

Packaging and Part Numbers

Part number 008A179 (x 10)

Packaging icon: 500 ml aerosol can

Health & Safety

Review all relevant health and safety information before using this product. For complete health and safety information, refer to the relevant Safety Data Sheet.

Download this Product Data Sheet as a PDF