Product Data Sheet – BYCOTEST D30A, D30plus

Solvent-based Developers

BYCOTEST® D30A and D30plus are solvent-based developers that provide maximum sensitivity through their solvent action on the penetrant at the site of any defects. Supplied as a ready-to-use suspension of white developing particles in a fast-drying solvent, they produce an opaque white coating which makes an excellent contrasting background for penetrant indications for both fluorescent and visible inspection processes.

Chemical product icon - developer


Increases indication visibility

  • Improves indication detection by creating an optimal surface for penetrant indication formation.
  • Bright white, opaque coverage blocks all underlying surface color and quickly draws penetrant to the surface for stronger, clearer indications.

Application versatility

  • Can be used with a variety of Type 2 and Type 1 penetrants in many different situations without measuring or diluting.
  • ISO 3452 conformance allows D30A and D30plus to be used to inspect a wide range of parts.

Faster cleaning

  • Reduces inspection process time by minimising post-inspection cleaning.


  • Bright white color
  • Provides good background contrast
  • Wicks penetrant out of indications
  • Fast drying
  • Easy to apply
  • Convenient, ready-to-use formula
  • Very low toxicity
  • Matte, opaque coating
  • Easy to clean
  • Maximum sensitivity
  • Low in sulphur and halogens
  • Contains no chlorinated hydrocarbons


Defect location: open to surface

Ideal for:

  • Welds
  • Machine shops
  • Field applications

Defect examples:

  • Cracks
  • Seams
  • Porosity

Specification Compliance

  • EN ISO 3452-2


A blend of inert inorganic particles suspended in a solvent blend. D30A is based on ethanol; D30plus is based on isopropanol and acetone.

Product Properties

Form and color White liquid
AMS 2644 class Form d – Type 1
Form e – Type 2
Flash point – aerosol -40°C
Sulphur content < 200 ppm
Chloride content < 200 ppm
D30A D30plus
Flash point – bulk 12°C -6°C
Density 0.94 g/cm³ 0.88 g/cm³

Like all Magnaflux materials, these developers are closely controlled to ensure batch-to-batch consistency, optimum process control and inspection reliability.

User Recommendations

Storage temperature 10°C to 30°C
Usage temperature -5°C to 50°C
Coverage 10 – 15m² per 400ml aerosol
20 – 30m² per litre
Cleaners C5, C10, SKC-S
Water-washable penetrants AL-4B, RP20, SKL-WP2, SKL-LT, ZL-15B, ZL-19, ZL-60C, ZL-60D, ZL-67B, ZL-56
Post-emulsifiable penetrants RP20, SKL-SP2, SKL-LT, ZL-2C, ZL-27A, ZL-37
UV lamps EV6000, ST700

Instructions for Use

Before using any developer, ensure the test surface is clean, free from excess penetrant, and dry. Residue from water-based penetrants can be removed with a water spray; solvent-based penetrants by wiping with a solvent cleaner.

With visible penetrants, cracks will appear as red lines and porosity as spots. If you see a general reddish colour or pink film, that means the penetrant was not completely removed.

With fluorescent penetrants, indications will fluoresce bright yellow/green under UV light. If you see a general greenish film, that means the penetrant was not completely removed.

If left to stand, the developer particles will settle out of suspension. D30A and D30plus must be continually agitated/shaken during use to ensure uniformity of mix.

Apply by spraying only (dipping or brushing will cause excessive solvent action) by aerosol or conventional spray gun. Spray in thin even layers which just wet the surface. Too wet a spray will cause excessive bleeding and running of indications; too dry a spray will result in slow indication development, as well as possible loss in overall sensitivity.

After inspection, remove developer residue by wiping with a cloth, or use a water and detergent wash.

Packaging and Part Numbers


Part number 008A176 (x 10)

Packaging icon: 400 ml aerosol can


Part number 008A177 (x 10)

Packaging icon: 400 ml aerosol can

Part number 060C043

Packaging icon: 5 litre metal can

Health & Safety

Review all relevant health and safety information before using these products. For complete health and safety information, refer to the relevant Safety Data Sheets.

Download this Product Data Sheet as a PDF