107: Thick Acrylic

A few months ago, my friend Arty got in touch with me and said he had “some thick acrylic” left over from a recent storefront revamp at a mobile phone store. Not really knowing what I was getting into, I said “hey any scrap material that I can laser is good with me!”

This stuff is so clear it's almost hard to see.

This stuff is so clear it’s almost hard to see.

Much more recently, I went to pick up the acrylic that he’d been graciously holding onto for me. As it turned out, the acrylic wasn’t just thick. It was far thicker than I could process with the laser, with 7/8″ as the thinnest edge. But there were several chunks of uniformly cut acrylic, and every surface was smooth enough that you could see clear through to the other side. This was material worth experimenting on!

The first engraving test confirmed that it was cast acrylic.

The first engraving test confirmed that it was cast acrylic.

I first determined whether it was cast or extruded acrylic by doing a surface engraving featuring some art deco frame stock. The surface engraving was powdery and white, which was perfect—cast acrylic engraves in a much more visible manner than extruded acrylic.

The second design didn't really convey the "frosted ice" look I was going for.

The second design didn’t really convey the “frosted ice” look I was going for.

The second design I tried was based on a “frosted ice” theme I developed while working with a client a couple of years ago. While it looked great on the snowflake shapes I used originally, the effect was lost on the square chunk of acrylic, and the “FROSTY” text I added didn’t really come out clearly.

Two different sizes of blocks "comprised" of tetriminos.

Two different sizes of blocks “comprised” of tetriminos.

I revisited some tetrimino patterns from a very early 52LASERS post. Using three different engraving techniques, I created a pattern that highlighted certain shapes with fills and deeper cuts. The result not only looks awesome from straight on, it created some really stunning effects when looking through the unengraved side of the acrylic.

Looking through the clean edge shows off each "deep cut" tetrimino.

Looking through the clean edge shows off each “deep cut” tetrimino.

Any fan of Tetris will recognize these shapes!

Any fan of Tetris will recognize these shapes!

I still have plenty of stock of these blocks left, so if you can think of any more creative ways to jazz up the acrylic’s surface, let me know in the comments!

Quite a supply of material too thick to cut through!

Quite a supply of material too thick to cut through!

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