Processes Color Change/Frothing

Color Change/Frothing

Plastics absorb laser light. The color pigments (from additives, colors etc.) and carbon in plastics are destroyed and vaporize as a result of localized heating. A color change becomes visible and the frothing of the material can be felt.

The carbon in the plastic oxidizes to form CO2, which comes out of the plastic and forms a layer of froth. 

The discoloration is either lighter or darker depending on the composition. Dark plastics discolor to white at the places to be marked, while light plastics discolor to gray or black (see carbonization).

Discoloration and frothing appear exclusively in case of plastics. 


Suitable laser systems:

Whether you are looking for comprehensive advice or already have specific ideas - we are here to help you! Let us advise you now!

Newsroom & Events

Get expert knowledge and the latest news on laser marking in our webinars, press releases and at our trade shows.

Don't miss any news


Let us advise you

Our sales and application engineers as well as our service technicians and project managers are close to you.

Send request