A friend of mine and Glowforge-yearner is a model-maker who just bought a Chinese 60W. He got very interested in Balsa Foam, which looks like fun stuff. (It’s a phenolic foam whose tagline is "Carves Like Butter, Paints Like Wood.)
The MSDS lists these as the hazardous ingredients:
It says this about flammability:
There are also these little tidbits that are potentially relevant:
Odor: Mild (Very low level of formaldehyde)
Inhalation: Remove victim to fresh air. If difficulties continue, contact a physician.
Incompatibility (Materials to Avoid): Contact with metal surfaces in the presence of moisture is
corrosive to that metal. Also may be softened by contact with strong alkali.
VENTILATION REQUIREMENTS: Use in a well ventilated area or with local exhaust for dust and odor control.
TOXICITY DATA: The foam contains low levels of phenol sulphonic acid which, when solubilized, will reduce the
pH of the solvent (water). Otherwise the foam is non toxic.
I’ve Googled its laserability and got nada. To me it sounds like it might not hurt him, but might melt into a gooey mess, and the dust might potentially corrode his machine if it got really humid in there for some reason. @takitus, @volivaa, or others, what is your take?