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Easily available from McMaster-Carr
See Pages 3445 and 3446 for a wide selection of clear, fluorescent and opaque acrylic. 12"x24" sheets are the max size for the Epilog Mini 24.
There are also stores that carry acrylic sheet!
Anodized aluminum in various colors, sold as Anodized name plate ($1.25 each) @ Laserbits.
Anodized aluminum business cards for $.50 each, bulk anodized aluminum tags of multiple sizes, shapes and colors: Chewbarkas eBay store
Anodized Tags in various colors - $0.69 each direct link @ Laserbits.
Anodized and powder coat dog tags for as little as $.25 each when purchased in quantity: Chewbarkas eBay store
Leatherman tools - for bulk orders of Leatherman tools to etch, we used Moon Trail (recommended by Leatherman).
Big NO-NO material with laser. The fumes from PVC is toxic and filter won’t help.
For safety reason, you may want to request the MSDS (Material Safety Data Sheet) to check if a “plastic” matieral contains PVC