This acrylic blank is nowhere near 4mm thick. Please note that I measured thickness with multiple precision gauges. The first photo shown shows the actual thickness of 3.17mm, and with the release paper still on the blank! Gaps ranged from 3.11 to 3.32. The second photo shows the thickness of all 4 pieces, so divide by 4 to get the average. All acrylic blanks are expected to have different thicknesses. I don't expect it to be exactly 4.00mm. None of the 4 blanks came close to 4mm. I don't like leaving negative feedback. It's important to me to be honest and accurate. Such an exaggerated claim is unacceptable. I deducted 2 stars for the thickness. I haven't engraved the blank yet but I believe it will work as expected in terms of laser processing. Update: I laser engraved one of these blanks with protective paper. They are generally 1/8 inch thick. The thickness given is an exaggeration, but it is just the right thickness for a base sold by the same supplier. It fits perfectly on the base with no "play". The matching lighted base is very bright. It hurts to remove paper. Weeding is not as easy as I would like. I will add a star to my original rating; brings it to four. The thickness is over the top, but the thickness is perfect for the coordinating lighted base.
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