KERNIK Red-White Penetrant Testing System

  • Dye Penetrant Inspection (DPI)
  • Non-Destructive Material Testing (NDT)
  • Liquid Penetrant Inspection (LPI)
  • Penetrant Testing (PT)


Surface breaking defects on all non-porous materials may lead to fracture because of notch effect, internal stress. These may happen during production process or from external force. It is a big problem in industries.

KERNIK Red-White Penetrant Testing can help detecting cracks even those can hardly be seen by naked eyes, before problem happen.

This is a low-cost method to detect defects such as crack or porosity that manifest on the surface of parts.

How It Works

  1. Clean the surface from oil, grease, paint, dirt or any loose scale by cloth. Then further clean by spraying with KERNIK Spray Cleaner 201.
  2. Spray KERNIK Red Penetrant 104 on the cleaned surface. The red penetrant will permeate by capillary action into any cracks/porosities on the surface.
  3. Moving excess penetrant from the surface with clean cloth. Spray KERNIK White Developer 102 onto the surface. The white developer will absorb the red dye in the cracks/pores. Linear signs are cracks and spot signs are pores.


KERNIK Red-White Penetrant Testing can be worked on casting parts, forging and welding surface from various types of materials including metals, ceramics, organic and composite materials.


  1. Reliability of test results.
  2. Simple operation.
  3. Quick results.
  4. Non-destructive testing.