Yellowing

Discolouration

Description of the defect

Change in colour tone of a coated surface

Cause of the defect

  • Use of a CN varnish as finishing lacquer on a light substrate.
  • Use of a non-light-fast polyurethane system as finishing lacquer on a light substrate.
  • Changing the substrate and/or the components that give the colour .

Defect solution

The yellowed layer of lacquer must be completely removed and replaced with a yellowing-resistant coating.

On the whole, age-related changes to the wood cannot be rectified.