I haven’t tried but according to Coroplast® the material is Polypropylene.
Polypropylene is a fire hazard and may ignite before darkening.
White Coroplast® may be too reflective for diode lasers to mark effectively.
A technique similar to Norton White Tile where you apply heat to fuse dark pigment into the surface of the material, and wash off what isn’t used, may prove useful.
I was thinking what could happen taking the laser out of focus and sunburning the surface. I have no experience with this.
I did see a youtube where a laser was cutting coroplast.
I’ve tried to use LBT100 and TiO2 on plastics and haven’t been too successful. The coating melts the plastic before the ‘marking’ material can melt…
The data sheet calls this a ‘corrugated’ product. So it’s not flat?
The datasheet also advises
“When working with the Coroplast ® sheets at temperatures above the melting point, the material may begin to decompose producing fumes that can contain carbon dioxide, carbon monoxide, ketones, acrolein, formaldehyde, aldehydes, oxides of nitrogen and other unidentified organic compounds that come from the breakdown of the materials used to make the sheets. Adequate ventilation should be provided to minimize exposures to vapors.”
Sounds lovely…
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