This likely won’t include anything novel for regulars but, this post on Core77 includes a pretty good explainer on cast vs. extruded acrylic, as well as the differences in Plexiglas / plexiglass nomenclature:
In my limited experience:
- Cast engraves frosted, extruded engraves clear.
- Extruded smells more and worse when laser cut and engraved.
- Extruded often comes with a plastic backing. Cast comes with a brown paper backing. Neither of them cut well and both tend to create burn marks.
Note that Proofgrade acrylic is cast, then custom-masked with a backing that we find performs better.
I have some cast that is plastic backed, it’s a scrap of .2" stuff I got from a local supplier. I rarely use it but love it when I do, and I’m not that far from running out.
what i appreciate about the GF masking is that it’s not such a @#*(&## PITA to remove, like the brown paper is. especially if it’s been on for a while. i have some old scraps my FIL got me nearly 3 years ago that i’ve only used some of because it’s just not worth the work of peeling masking off of some of it.
My local plastics supplier just gave me 8 feet of 3/4 inch 6 inches wide because the masking was hard to remove. I just peeled it all off and remasked with new.
We need a mnemonic to keep track. I alway forget which one is the stinky one (until it’s too late).
Well, i can think of something else that is extruded and stinky, if that helps.
Now I can’t un-see it. That works!
I suspected that might do the trick.
cast is the bast
extruded isn’t fit for fooded
Thanks guys! Now I’m not going to be able to remember that extruded acrylic is stinky without…
This topic was automatically closed 32 days after the last reply. New replies are no longer allowed.