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Instant prices on cut to size perspex
Cut to size prices
Outstanding customer service
Customer service
Free fast delivery on all plastic sheet
On orders over £150
30+ years experience in the plastics industry
Experience with plastics
From £0.96 inc VAT In stock

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The thickness of the material listed in mm.
The length of the required material, stated in mm. PLEASE NOTE: We only cut material in mm, so please ensure any conversion from inches to millimeters is correct.
The width of the required material, stated in mm. PLEASE NOTE: We only cut material in mm, so please ensure any conversion from inches to millimeters is correct.
The radius for each corner.
Should the sides i.e. the cut edges be polished?
Choose the number and positions of the holes you require.

From £0.96 inc VAT


Perspex Price Promise Found a cheaper price? Call us on 01206638056 to see if we can beat it!

Product description

Opal acrylic sheet is white in tone and produced specifically to diffract and diffuse light when used as with light box signage systems. Opal light diffusing sheet is available cut to size.

Key features:

  • Optimised to diffract and diffuse light
  • Weather resistant
  • Hard wearing
  • Available cut to size

Popular applications:

  • For use with light box signage systems
  • Cieling lighting tiles

Further detail:

Light transmission

Opal cast acrylic has a light transmission rate of 37%. The sheets diffract and diffuse light evenly when used to illuminate light box signage systems.

Weather resistant

Acrylic or Perspex® is weather resistant so suitable for use for both interior and exterior signage applications.

Hard wearing

Opal acrylic light diffusing sheet is strong durable and long lasting.

Maximum sheet size3050mm x 2030mm
Available thicknesses3mm, 5mm, 10mm
Colour ref codeOpal 050
Light transmission37%
Manufacturers thickness tolerance+/- 10 % plus 0.4mm (e.g. 5mm cast sheet could vary from 4.1mm to 5.9mm)
Fire ratingUK class 3 fire rating
Protective filmSupplied with protective plastic film on both sides

We currently deliver to the UK and throughout Europe. Delivery charges are calculated based on the longest side of the material ordered. Only one delivery charge is applicable per order regardless of how many items are ordered.

Longest side Orders under £150 (inc VAT) Orders over £150 (inc VAT) Express Delivery
Samples £2.95 FREE £9.95
Less than 500mm £5.95 FREE £12.95
500mm to 1999mm £9.95 FREE £14.95
2000mm or greater £14.95 FREE £24.95
Sneeze Guards (All sizes) £9.95 FREE £14.95

Europe (7-10 working days)

Delivery guidelines
We process and dispatch all orders as quickly as possible - our delivery guidelines are as below:

  • Standard delivery (3-5 working days)
  • Express delivery (2-3 working days)

Express Delivery
If you require faster delivery you may wish to consider choosing our Express Delivery option at the checkout. Express Delivery orders will be prioritised and will be delivered using a recognised nationwide courier.

Next Day Delivery
Next Day delivery is not available via our website due to the quantity of orders we receive on a daily basis. However, if you need to place an order and require Next Day delivery please contact us – we will make every effort to meet your requirements and deadlines.

Collection is available from our location in Colchester, Essex (see full address). When placing an order on our website there is an option on the final stage of the checkout for Collection/pickup. Once your order is ready for collection you will be notified via email.

Due to the nature of the ”made to measure” products we supply, we provide delivery prices at a standard rate and reserve the right to cancel an order should it become economically unviable to fulfil the order. In these rare circumstances the customer will be contacted first to discuss alternative options.

When delivering to some delivery locations we can incur increased shipping costs, if this is likely to happen the customer will be contacted to discuss any possible extra delivery charges required.

Examples of delivery locations which may require additional delivery charges are,

  • Channel Islands
  • Scottish Islands
  • Isle of Man
  • Isles of Scilly
  • Remote areas
  • Northern Ireland

If you require delivery to one of these areas please get in touch to discuss your order.

You may also wish to read more detailed information regarding our terms and conditions in relation to delivery.


Will I be notified when my order is out for delivery?

Yes. Simply Plastics will send you an email when your order has been dispatched. If your shipment is trackable the email will contain tracking details and a link to the delivery couriers website, where you can track the progress of the shipment.

I need my order urgently, can I pay for faster shipping?

Yes. We offer an express delivery service which aims to deliver all orders in 1-3 working days. Orders are delivered by a recognised courier company and may require a signature on delivery.

Can I collect my order from Simply Plastics?

Yes, of course. At the final stage of the checkout process there is a delivery option labelled "Collection/pickup" which is free. When your order is ready for collection you will receive an email to notify you, which includes our opening times and address.

Collection -example

Can Simply Plastics help me with a fabrication project?

Yes we can. Customised, cut-to-size materials can be ordered directly through the website, but if you require further fabrication we can help you with this too.

Our fabrication services include,

  • CNC routing
  • Bending
  • Shaping
  • Bonding/glueing
  • Diamond polishing
  • Flame polishing
  • Intricate laser cutting

Examples of fabricated products include,

  • Acrylic display cases
  • Point of sale 
  • Retail display
  • Lighting applications
  • Brochure holders
  • 2D/3D Acrylic lettering
  • Furniture
  • Office Interiors

For enquiries regarding any project from prototypes to large production runs, please get in touch to discuss your requirements.


I bought this sheet to make myself a light box for transferring my drawings to fabric for quilting and wanted that this one would be bigger than my old one. This opal sheet is doing the job briliantly, the quality is very high. Order arrived on time, packed very carefully. I recommend this seller.

My husband used the product for some outdoor lights he built. The Opal Acrylic Light Diffusing Sheets were just great for the job, arrived promptly and perfectly packaged.

Used opal acrylic for signs on light boxes - 3mm thick Perfect- will be ordering again

I used the opal acrylic for a light box. It diffusés very well the light. Great quality, came cut to the size I wanted, fast and affordable. I would recommend this company.

Photographic use. Works fine.

I bought this to use in my still life photography. Very pleased with quality of product and the fast and efficient service. I shall probably purchase similar from you again.

I wanted light diffusing panels to fit over small LED panels for photography.

Opal Acrylic Light Diffusing Sheets were used to replace missing items in a couple of flush mounted fluorescent fittings for which the original diffusers have long been unavailable. Good quality items, many thanks.

really good product. fast shipping.

First time buyer. Fast prompt service. Good quality material which was accurately cut. Thank you.

I used two sheets behind decorative glass box frame which had lighting behind. My measurements were perfect.

Converted the feature crests from the lead light windows removed from our house into individual framed pictures. These were framed and backed with the defuser and backlit. They were then mounted as a wall feature in a cellar dining area. Very pleased with the result and the effect or the defuser

I ordered as needed something which was strong & stable to make a photo box to take photos of cards I make for charity to have record different cards I make. Tried other products but this is far the best for the job. got 4 pieces 1ft high by same in width, So far I have not needed to add a light source very happy with the results, whether using mobile or my camera to take photos. Excellent value for money was cheaper than other products bought previously. If you do photography I would highly recommend using this and this company as great value for money quick delivery too. Will use again.

Excellent service excellenct product great communication Thank you P.s. Sorry for late reply on holiday no WiFi here

Sheet was used for non-standard size light box and supplied cut to size. No problems and happy to recommend.

Excellent product. Used for diffusing led lighting in a box frame for stained glass display.

I bought this as a photography accessory and it works a treat Many Thanks

Product quality excellent. Used to repair light box which saved buying a new one.Customer service excellent, always able to speak to a real person which is becoming a luxury now. Would recommend.

I purchased this product to diffuse a LED bicycle light that I adapted to use as a dartboard light.

Quality of product was excellent and cuttings very accurate. Highly Recommend Simply Plastics products.

3mm sheet used as diffuser in light box behind stained glass (lit using strip LEDs round the edge behind diffuser with white board at the back of the box). Worked well, did the job, no problems. Thank you.

Ordered light defusing strips cut to size and edges polished. Arrived very quickly and were super accurate. Brilliant product and service, will use again.

I used this acrylic sheet as a diffuser for a light box. It works perfectly and would recommend it without hesitation.

Great service and quality product! I ordered the 5 mm sheets to make led light boxes for a display at an art exhibition; works extremely well and complimented the art works very well too; a big thanks again!

Good service, products were used for decorate lighting boxes in hallway and were cut to exact size requested. Thanks Lyn