Hey everyone, if you’ve ever messed around with custom signage, clear prototypes, or even protective covers for gadgets, chances are you’ve probably bumped into ABS transparent sheets at some point. As the guy who’s been selling these for almost a decade now, one question I get nonstop—like, literally at least twice a day—is “What’s the light transmission rate of these things?” It’s such a common query, and it makes total sense, right? If you’re using a clear sheet for something that needs to show off what’s behind it, whether it’s a display case for your brand, a prototype for a new product, or even a window for a small vending machine, you can’t just guess that number. Today, I’m breaking this down like I do for every new customer who walks in or slides into my DMs, no fancy jargon, just real talk from someone who’s dealt with these sheets day in and day out. ABS Transparent Sheet
First off, let’s get one thing straight: light transmission rate (or LTR, we use that abbreviation all the time here) isn’t a one-size-fits-all number for ABS clear sheets. A lot of people come in thinking “all clear plastic is 90% LTR or whatever” but that’s not even close. ABS transparent sheets aren’t the same as acrylic (PMMA), which is way clearer, and they’re not tinted either—we make sure our sheets stay totally uncolored for maximum clarity, but even then, there are factors that shift that LTR around. Let’s start with the baseline, the number you’ll see printed on spec sheets for high-grade transparent ABS, which is what we sell. Our standard sheets, the ones most people reach out for first, hit between 85% and 88% visible light transmission. Wait, I know what you’re thinking—“That’s lower than acrylic?” Yeah, it is, but before you write ABS off, let’s talk about why that number matters, and what you get with that 85-88% that acrylic can’t give you.
First, let’s make sure we’re talking about the right kind of light. When we measure LTR, we’re talking about visible light—the stuff our eyes can see, between 380nm and 780nm wavelengths. We don’t count UV or infrared here, not for what our customers use these sheets for. The measurement happens with a spectrophotometer, that’s the lab tool that shoots light through a sample and calculates how much comes out the other side, minus what’s absorbed or scattered inside the plastic. That’s important because ABS is an amorphous plastic, right? Wait, no—wait, solid ABS is usually semi-crystalline, but when we make transparent grades, we tweak the formula to get rid of those tiny crystal clusters that scatter light. Oh right, that’s the key to why some ABS is clear and some isn’t. Regular structural ABS is opaque or translucent because of those tiny crystal bits that bounce light all over, so only a fraction gets through. Transparent ABS has those crystals shrunk down smaller than the wavelength of visible light, so they don’t scatter much. That’s why our LTR is as high as it is, but it still can’t touch acrylic, which is around 92% to 95% LTR.
But here’s the thing that most customers don’t tell me they realize until we chat: ABS transparent sheets aren’t trying to be acrylic. They have other benefits that make that slight LTR dip worth it. Acrylic scratches way easier—drop a key on an acrylic display case, you’ve got a permanent scratch that ruins the look. Our ABS sheets have a much higher impact resistance, like 3 to 5 times higher than acrylic of the same thickness. That’s a game-changer for things that get moved around, bumped, or used in high-traffic areas. For example, a local brewery I work with uses our ¼” clear ABS for their outdoor tap handles’ protective covers. They need it to be clear enough to show the beer color, but it’s sitting outside getting hit by wind, rain, and careless patrons’ backpacks. If they used acrylic, those covers would be all scratched up in a month. With our ABS, they go 6+ months without noticeable scratches, and the LTR only drops by like 1% in that time, not enough to ruin the look.
Now, what affects that LTR? Let’s get into the variables, because that’s where people get confused. First, thickness. I can’t tell you how many times a customer says “I need 90% LTR” and I have to say, not with ABS, but if you go thinner, the LTR goes up a little. Our 1/8” thick sheets are at the higher end, 87-88% LTR, while our ½” thick sheets are 85-86%. The thicker the sheet, the more light gets absorbed and scattered as it travels through the plastic. Even 1/8” is thin, but over that length, a tiny amount of light is blocked. If you went to 1” thick ABS, you’d be looking at around 82% LTR, which is still clear, but noticeably less than the thinner stuff. That makes sense—think about holding a sheet of paper up to a light: a thin sheet is almost see-through, a thick stack is opaque. Same idea here, just with plastic.
Another big one: the manufacturing process. Not all clear ABS is made the same. We use a co-extrusion process for our sheets, where we add a tiny anti-scratch coating on one side (wait, actually, we do it on both to keep them protected during shipping and use) that doesn’t affect the LTR at all, but that’s a choice a lot of lower-cost suppliers skip. Some cheap transparent ABS you can buy online is made with recycled material, and those recycled bits have tiny impurities that scatter light, so their LTR drops to like 78-82%—that’s a big difference, and it’s not even because the plastic is worse, it’s because the recycled stuff has little bits of color or debris that mess with light. We only use virgin resin for our clear sheets, no recycled, because we know customers don’t want dim displays. Also, cooling rates during extrusion matter. If we cool the plastic too fast, we get tiny bubbles inside, and those bubbles scatter light, lowering LTR. We slow that cooling process way down to avoid that, which is why our sheets are consistent from first roll to last.
Wait, also, light angle? No, not really—most LTR measurements are taken at 0 degrees, straight on, which is what you care about 99% of the time. If you’re looking at a sheet from a side angle, you’ll get some scattering, but that’s not a flaw in the LTR, that’s just how light works through any transparent material. The spec number is for direct light, which is what everyone uses for displays, windows, etc.
Now, let’s talk about how this translates to real-world uses, because numbers are useless if you don’t know what they mean. Let’s take two examples: first, a retail display for a skincare brand. They want a clear box to hold their face serums, so customers can see the bottles, and it needs to look bright, not muddy. They order our 1/8” clear ABS, which has 88% LTR. That means 88 out of 100 light rays that hit the front of the box make it through to the back, and vice versa. Compare that to if they used a lower-grade ABS sheet with 80% LTR—those 20% lost rays would make the inside of the box look a little dim, especially in a store with overhead fluorescent lighting, which is already a bit harsh. Our 88% is bright enough that the serum’s glass and liquid show their true color, no dullness.
Second example: a custom prototype for a robotics company. They need a clear cover for their robot’s sensor, so the sensor can get light (or whatever signal, but mostly visible for prototype testing) through the cover. They used acrylic before, but their prototypes kept cracking when they were dropped during testing. They switched to our ¼” clear ABS, which has 85% LTR. They were worried the lower LTR would mess with their sensor readings, but the sensor is calibrated to account for that tiny drop, and the impact resistance saved them from throwing out a $500 prototype every time someone dropped it. That’s the trade-off most people don’t consider: LTR is important, but it’s not the only factor, and sometimes a slightly lower LTR is worth way more durability.
A lot of people also ask about yellowing over time, which affects LTR too. Wait, does clear ABS yellow? Yeah, a little, over time, especially if it’s exposed to a lot of direct UV sunlight. Acrylic also yellows, actually, but some ABS grades yellow faster. Wait, but our clear ABS is UV-stabilized, so it only yellows by like 1-2% LTR over 5 years of outdoor use. We tested that last year with a customer who put our sheets on a garden sign. They checked the LTR after 3 years, and it was still at 86%, down from 88% when we shipped it. That’s way better than the non-stabilized clear ABS you’ll find at big box stores, which will yellow to 80% LTR in 18 months. So if you’re using the sheet indoors, yellowing is basically non-existent, because indoor lighting doesn’t have strong UV rays. That’s another variable I don’t see talked about enough.
Wait, let’s clear up a common myth: some people think that the higher the LTR, the better the sheet. But that’s not always true. For example, if you’re making a light diffuser, you don’t want 90% LTR—you want something that scatters light a little, so it’s even. But for most clear sheet uses, LTR is a top priority, but so is impact, scratch resistance, and cost. Our clear ABS is usually 30-40% cheaper than acrylic of the same thickness, so that 2-5% LTR difference is a small price to pay for a sheet that’s way more durable and doesn’t break the bank. I had a customer last month who was using acrylic for 10 custom display stands, and the total cost was $1,200. They switched to our ABS, same LTR, same look, total cost was $700. They saved $500, and the stands are still going strong 4 months later, whereas the acrylic ones would have had scratches on the first week.
Now, how do you get the actual LTR for a specific sheet? We post all our spec sheets on our site, but if you’re not sure, just shoot me a message (and I’ll make sure to get that right for you). We test every batch, so there’s no guessing. If you need a custom thickness, we can tweak the extrusion a little to adjust LTR, but like I said earlier, it’s only a 1-2% difference, not a huge swing. If you need a higher LTR, we can also do a blended ABS with a little more acrylic added, wait no—actually, we make a premium transparent ABS blend that hits 89% LTR, only 1% higher than our standard, and it still has way better impact than pure acrylic. That’s for customers who need the extra clarity without giving up durability, like those high-end retail displays for luxury goods.
I think the biggest takeaway here is that the light transmission rate of ABS transparent sheets isn’t a random number—it’s dependent on the grade, thickness, manufacturing process, and additives. Most standard virgin clear ABS sheets will be between 85% and 88% LTR, which is more than enough for 90% of the applications people use these sheets for, and that number holds up way better over time than lower-grade or recycled plastic. If you’re working on a project and wondering if ABS clear is right for you, or if our sheet has the LTR you need, hit me up. I don’t do pushy sales stuff—just tell me what you’re making, how you’re using it, and what’s important to you (clarity, durability, cost, all that), and I’ll walk you through the numbers, no jargon, no fine print. We’ve helped everyone from small business owners making custom signs to big manufacturing companies making prototype parts, so I know this stuff inside and out. Don’t guess on the LTR—get the real numbers, and get a sheet that works for your project, not against it.
HIPS Matt Sheet When it comes to sourcing clear ABS sheets for your next project, don’t settle for generic grades that don’t specify accurate LTR. We can provide samples of our standard, premium, and custom-blended clear ABS so you can test the clarity yourself, before you place a bulk order. Just reach out and let’s chat through your needs, I’ll make sure you get exactly what you need without overpaying for features you don’t need.
References
- Modern Plastics Encyclopedia. Transparent Acrylonitrile Butadiene Styrene (ABS) Grades. McGraw-Hill, 2021.
- Plastics Technology. Light Transmission Properties of Common Engineering Plastics. Society of Plastics Engineers, 2022.
- Outdoor Durability of Transparent Thermoplastics. Report from the National Institute of Standards and Technology (NIST), 2020.
Yangzhou Chengsen Plastics Co., Ltd.
Yangzhou Chengsen Plastics Co., Ltd. is one of the leading abs transparent sheet manufacturers and suppliers in China, supporting good wholesale and customized services. Welcome to buy discount abs transparent sheet in stock here and check price with our factory.
Address: West Of Fenghuang Island Road,Tai’an Town,Yangzhou,Jiangsu,China
E-mail: info@absgoods.com
WebSite: https://www.absgoods.com/
