Penetrant testing

according to DIN EN ISO 3452-1:2013
Penetrant testing red

Penetrant testing fluorescent

With the Penetrant Testing procedure (also known as DP test or dye penetrant inspection) you can quickly determine surface discontinuities on all iron metals and non-iron metals, some plastics and ceramic materials, glass, etc., provided that the discontinuities are open to the surfaces.

The liquid penetrant test method is used in the examination of welding seams, cast pieces, in shipbuilding, automobile and aircraft construction, apparatus and tank construction, etc.

A distinction is made between coloured and fluorescent penetrant testing. The characteristic feature of the penetrant method is that defects such as cracks, pores etc. can also be detected and made visible on non-magnetizable materials.

Process description:

The testing procedure consists of four separate processing steps, for which the following products are necessary:

  1. Precleaning (MR® Remover)
  2. Application of penetrant (MR® Penetrant)
  3. Excess penetrant removal (MR® Remover or water)
  4. Application of developer (MR® Developer, white)

From practice: Penetrant Testing red/white

Data sheets

Process description
Process overview

Product information (PDF)

MR 3001
MR 3002

Application of penetrant
MR 67 PS
MR 68 C
MR 68 H
MR 68 NF

Excess penetrant removal

MR 91 H

Application of developer
MR 70
MR 70 H

Special products
MR 750