These are all leather, 3.2 - 3.8mm, cost about $10/sqft if buying 1/2 of cow hide, Etsy. D&D hide was purchased with that nice durable finish, the other two are Natural veg oil finish ok to stain or oil. The MC coasters are finished with a couple coats of neatsfoot oil. 10000mm/m is about max spd for my laser, the etching is lighter and shallower of course, but still durable and good. Laser is Neje A40640, dual diode about 15w output.
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