Cast acrylic provides superior optical clarity and surface quality compared to extruded acrylic. This makes cast acrylic the preferred choice for applications requiring high transparency and visual quality, while extruded acrylic may be suitable for more budget-conscious projects where perfect clarity is less critical.

Cutting Cast Acrylic

Circular Saw
Table Saw
Jigsaw

Polishing Edges

Sanding Block
Buffing Wheel
Click here to get more introduction for polishing and cutting. 

• Frosted/Matte: soft blur, moderate diffusion
• Opal/White: common, high diffusion + good transmission
• Prismatic/Patterned: directional control, reduces glare
• LED-specific: eliminates hotspots, designed for close LEDs
• Light Guide Panels (LGP): edge-lit, slim panels for uniform light

• Usually 0.8mm–6mm
• Thicker = softer light, fewer hotspots
• Thinner = higher brightness but may show LED points

Yes, using:

• Laser cutting
• CNC routing
• Scoring & snapping (for thin sheets)
• Thermoforming for curves

Avoid sharp bends on thick sheets—they can crack.

• Acrylic is UV-resistant, so opal/frosted sheets work outdoors

For most LED lighting applications, 1 mm to 2 mm acrylic diffuser sheet is a practical starting range. Use 1 mm for lightweight LED panels and compact lightboxes, 1.5 mm for general backlit signs and displays, and 2 mm where the panel is larger or needs more rigidity.

The best thickness also depends on the diffuser grade, LED spacing, panel depth and required brightness. Thicker material can improve rigidity and soften the appearance of the light, but it does not replace proper LED spacing or a suitable diffuser grade.

There is no single spacing that guarantees hotspot-free illumination because results depend on LED brightness, beam angle, LED pitch, diffuser grade, thickness and light transmission.

As a starting point, test the proposed sheet with the actual LED module and panel depth before production. If the LEDs are close to the diffuser, choose a stronger diffuser grade or lower transmission option to better conceal individual LED points. For deeper lightboxes, a higher-transmission diffuser may provide sufficient uniformity while preserving more brightness.

Opal acrylic diffuser sheet uses a white or milky appearance to spread light and create a more uniform illuminated surface. It is commonly used for lightboxes, backlit signs, LED panels and ceiling lighting.

Frosted acrylic diffuser sheet has a matte surface that softens light and reduces glare. It is useful when the project needs a softer visual effect while maintaining a relatively clean material appearance.

Prismatic acrylic diffuser sheet uses a patterned surface to control and redirect light. It is often selected for lighting fixtures where light distribution and glare control are important. Confirm the required prism pattern and lighting performance before selecting this option for a project.

For many backlit signs, 65% light transmission is a balanced starting point because it can retain useful brightness while improving light uniformity. 30% transmission is more suitable when stronger diffusion and LED-point concealment are required. 80% transmission is better when brightness is the main priority and the lighting layout already provides good uniformity.

The correct choice should be validated with a sample using the actual sign depth, LED type, LED spacing and face graphics. Higher transmission usually increases brightness, while lower transmission generally improves diffusion and reduces visible hotspots.

Acrylic diffuser sheet can generally be cut, CNC routed, laser cut and thermoformed, subject to the sheet grade, thickness and fabrication requirements.

For the cleanest result, test the intended fabrication method with a sample before full production. Laser cutting may require process adjustment to achieve the desired edge finish, while thermoforming requires suitable temperature control to avoid distortion or surface defects.

Yes. Custom requirements can include sheet dimensions, thickness, color, light transmission and diffusion characteristics, subject to production requirements and order quantity.

Provide the application, required sheet size, preferred thickness, transmission target, quantity and destination market when requesting a quote. This gives the supplier the information needed to confirm material suitability and production options.

Samples should be requested before a full production order, especially for LED lighting and backlit-sign projects where appearance depends on the full lighting assembly.

When requesting a sample, provide the LED type, LED spacing, panel depth, required transmission level, target color or finish, sheet thickness and intended application. Test the sample in the finished lighting setup before approving production, since the final result depends on the interaction between the LED layout and diffuser sheet.