Why does 1220 2440mm colored acrylic board fade
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Why does 1220 * 2440mm colored acrylic board fade?
Many customers are most concerned about fading when purchasing 1220 * 2440mm colored acrylic sheets. A sheet of board may be used for advertising on the exterior facade of a building, a lightbox sign in a shopping mall, or a three-dimensional illuminated lettering on a storefront. If it starts to turn yellow, fade, or lose its luster after a few months of use, it not only affects the aesthetics but also directly damages the brand image and economic value.
So, why does acrylic board fade? What is the difference in fading speed between outdoor and indoor use? This article will start with the chemical structure and aging mechanism of acrylic sheets, analyze the core factors that cause fading, and help you make the correct judgment when purchasing.
Strictly speaking, acrylic sheets are not "colorfast", but high-quality sheets with excellent weather resistance and colorfastness, which can maintain their original color for a long time under outdoor conditions. This performance mainly depends on the following aspects:
1. Addition of UV absorbers
One of the main reasons for the aging of acrylic sheets is exposure to ultraviolet radiation. Long term exposure to strong sunlight can cause ultraviolet radiation to break down the structure of acrylic sheet molecules, making them fragile and brittle, while also causing discoloration. Therefore, adding UV absorbers during the manufacturing process becomes crucial - UV absorbers can absorb UV rays and convert them into heat energy, thereby protecting acrylic sheets from UV damage. High quality boards are usually equipped with nano ultraviolet absorbers, which can absorb 95% of ultraviolet rays from sunlight, greatly extending their outdoor service life.
2. Light resistance level of coloring agents
The degree of fading of colored acrylic sheets is closely related to the light resistance of the coloring agents used. The light resistance level of the coloring agent used in outdoor products exposed to direct sunlight is a key indicator. Products with poor light resistance levels will quickly fade during application. The light resistance level used for weather resistant products should not be lower than level six, preferably level seven or eight. For indoor products, level four or five can be selected.
3. Quality difference between new and recycled materials
The appearance color of pure new material acrylic board is pure, and both the front and cross sections should be transparent, colorless or uniformly colored. It has been added with ultraviolet absorbers and will not turn yellow, fade, lose luster or crack for at least 5 years. The cross-section of the board containing recycled materials turns yellow, with poor UV resistance, and is highly prone to yellowing, fading, and cracking. At most, obvious yellowing will occur within six months.
4. Light resistance properties of media resin
The light resistance of the medium resin (substrate itself) also has a significant impact on color stability. After UV irradiation, the molecular structure of some inferior resins may change, leading to fading. Adding light stabilizers to the masterbatch can effectively enhance the light resistance of coloring agents and colored acrylic products.
To ensure that 1220 * 2440mm colored acrylic sheets do not fade outdoors, it is necessary to choose sheets with the following characteristics:
1. UV resistant acrylic sheet
UV resistant acrylic sheet is a product specifically designed for outdoor applications, using additives such as UV stabilizers to effectively reduce the impact of ultraviolet radiation on acrylic sheets, avoiding aging, yellowing, brittleness, and other phenomena, thereby maintaining transparency and strength for a long time outdoors. This type of board is recommended for long-term outdoor use, such as outdoor billboards, outdoor lightboxes, windshields, skylights, lane signs, etc.
2. Jinbao colored acrylic board
The colored acrylic sheets of Jinbao brand are made of 100% virgin lucite mma, which can be used outdoors for 8-10 years without significant fading, with pure color, no color deviation, and bright colors. The impact resistance of this type of board is 6-17 times that of glass, and its weight is less than half of glass, making installation and transportation more convenient.
3. Thousand color UV resistant acrylic sheet
The anti UV board of Qianse Acrylic Company adopts casting technology and is produced using 100% pure new materials, without using recycled materials. Customers can choose to add anti UV function for outdoor use. The thickness range is 2mm to 30mm, with commonly used specifications including 1220 * 2440mm, which has excellent UV resistance and better weather resistance.
4. JM UV resistant color board
Jumei brand's colored acrylic sheets are made of 100% virgin Mitsubishi material, with a light transmittance of 93% and a color durability of up to 5 years. They can withstand direct sunlight and maintain color integrity. Suitable for advertising signs, outdoor signage, and other scenarios.
The outdoor service life of acrylic panels varies significantly depending on the material grade:
Brand new acrylic sheet: Made of pure new material and added with ultraviolet absorbers, the outdoor service life of acrylic sheet can reach 5 to 10 years. Some high-quality colored boards will not fade after being placed outdoors for 8 to 10 years. The new acrylic sheet has a light transmittance of over 92% and excellent UV resistance.
Mixed acrylic board: A board containing some recycled materials, with an outdoor service life of about 5 years, and may experience yellowing and aging after long-term use.
Recycled acrylic sheet: A sheet made entirely from recycled materials with extremely poor UV resistance, which can turn yellow and crack within six months at most. It is not recommended for outdoor use.
Reference data: Tangchen TC-1 series acrylic sheets have completed a 10000 hour rapid aging test (equivalent to 20 years outdoors), and after 10 years of use, the transmittance decreases by ≤ 10%. Generally speaking, even ordinary acrylic materials can have a service life of about 3 years in outdoor environments, while high-quality materials can last for more than 5 years.
There are various types of colored acrylic sheets, which can be classified into the following categories based on color effects and surface treatment:
1. Classify by transparency effect
Type Transparency Range Visual Effects Typical Applications
Light colored transparent (ice blue/light pink) 85-92% fresh and transparent, with soft light, light box, decorative partition
Medium transparent (gemstone blue/amber) 70-85% vibrant color, strong atmosphere, commercial display, art installation
Dark transparent (dark gray/dark green) 40-70% stable and mysterious, light blocking and privacy building curtain walls, high-end doors and windows
Pearl/metallic color 50-80% shimmering texture, luxurious effect luxury display, creative design
2. Classify by color
Common colors include: transparent, black, white, red, yellow, blue, green, pink, orange, purple, dark gray, sky blue, brown, etc. Professional manufacturers can provide over 100 color options.
3. Classify by surface effect
Including smooth surface (high gloss/bright surface), frosted surface (single-sided frosted/double-sided frosted), mirror effect, marble texture, semi transparent effect, etc. Matte acrylic board is transparent and opaque, with soft light, suitable for occasions that require privacy protection.
4. Classified by production process
There are two main ways to achieve color effects on colored acrylic sheets: body dyeing - adding colorants or dyes during polymerization or extrusion processes to achieve uniform and transparent colors; Laminated composite - transparent plates with colored films or coatings sandwiched between them, with rich levels of color saturation; Gradient/Illusion - Special techniques achieve color gradient changes or interference color effects.
When choosing colored acrylic sheets, it is crucial to choose a reliable manufacturer:
How to determine if the manufacturer is reliable
Check the source of raw materials: Reliable manufacturers will clearly inform whether to use 100% pure new materials and provide raw material testing reports. Qianse Acrylic Company clearly states that the raw material MMA is purchased from internationally renowned factories, and the production equipment and technology have reached the latest international standards.
Judging by production capacity: Manufacturers with larger production scales usually have more stable quality. For example, Zhejiang Zhanyu has multiple optical extrusion production lines, with a daily production capacity of up to 12 tons per line. Its products are exported to Europe, North America, Southeast Asia and other places.
Product certification: Legitimate manufacturers should have ISO, CE, RoHS and other certifications. Jinbao brand has 35 production lines and its products have obtained multiple international certifications such as SGS, CE, RoHS, REACH, etc.
After sales service: High quality manufacturers provide online technical support, customized services, free sample making, and other after-sales services. When purchasing, the return and exchange policy, warranty period, and after-sales response time should be confirmed.
Procurement precautions
Clearly define outdoor usage requirements and confirm whether UV resistant components have been added to the board
Request samples for on-site testing, observe cutting effect and thickness tolerance
Confirm the minimum order quantity and delivery cycle before bulk procurement
Require the issuance of formal testing reports and relevant certification documents
For long-term outdoor use projects, it is recommended to choose well-known brands and sign a warranty agreement
| product type | pet、ps、acrylic、acrylic mirror、pvc sheet,acrylic sheet |
| thickness | 0.35-300mm |
| Styles | 1220*2440,1220*1830,500*900,50*60,960*1950,700*900/Customization of various specifications and sizes |
| delivery time | 5-8day |
| manufacture | Yifang |
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