I am trying to engrave some lettering into 1" acrylic (and I am 95% sure that it is cast acrylic) but everything I have done turns up clear or maybe slightly milky. I am trying to get a nice white uniform frosted look on the engraving. I've tried both cast and extruded acrylic (the extruded was a messy molten disaster!). For the image attached the specs are as follows:
Bit: 1/16" solid carbide one-flute down cut super O flue (Onsrud 64-000) --for the size of the lettering I need to at least have this small of a bit for the outline
Feedrate of 30in/min and an rpm of 14000, engraved at a depth of 0.115 in two passes.
Does anyone out there have advice for how to achieve a white frosted finish?
Thank you!