Laser Marking +
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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:
Other Laser Marking Processes
Carbonization
Laser carbonization always results in a darkening of the marked material.
See Details
Laser Annealing
An oxide layer is applied to ferrous metals and titanium by heating the material locally.
See Details
Laser Engraving
Laser engraving is a process using laser markers for marking and finishing industrial parts and products. The terms laser engraving and laser marking are often used interchangeably.
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