AcrylicBeginners

Best Practices & Settings For Edge Lit Acrylic

The Technical & Practical Aspects Of Engraving Edge Lit Acrylic

Acrylic is an awesome medium for C02 lasing. This article will cover the processing of acrylic for edge-lit projects but these principles still apply to basic acrylic etching in general. Before we jump in let’s cover a few important details.

Types

click image to enlarge

There are 2 common variations of acrylic and while they are all chemically similar, they behave very differently from one another due to the manufacturing process:

 

  • Extruded Acrylic: This is what is commonly found in big box and local hardware stores. This is made by forcing the acrylic resin through a form. This type is usually masked in plastic and when etched produces very little contrast.
  • Cast Acrylic: This type of acrylic is not commonly found locally but it is used in aquariums so a pet or aquatics store may be worth a try. It is produced by pouring the resin in a cast and subjecting it to heat and pressure. Cast is usually masked with thin craft paper but not always. Cast is great for etching and produces remarkable contrast.

You can learn more about the differences between cast and extruded HERE.

Properties

Light travels through cast acrylic along the outermost edges of the material. This is why it’s called edge lit. Extruded acrylic lacks this characteristic.

Engraving

When engraving you only want enough power to sustain a uniform beam signature and to barely ablate the substrate. Going deep into acrylic actually lessens the effect.

To learn how to process a photo for lasing in standard design software check out The Laser Engraving Institute!

Cutting

When you cut acrylic there are a lot of factors at play besides your speed, power, focus, etc… Russ Sadler has some great in-depth tutorials on one of his YouTube channels HERE.

Source
Induflex A/SRuss SadlerLit-O-PaneTech BravoThe Laser Engraving Institute
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