What are Grade “C” PC Solid Sheet, Grade “B” PC Solid Sheet and Grade “A” PC Solid Sheet?

Grade “C” PC Solid Sheet, Grade “B” PC Solid Sheet and Grade “A” PC Solid Sheet refer to PC Solid Sheet with a service life of three years, five years and ten years respectively.

According to the standard JG347T‑2012 Polycarbonate (PC) Solid Sheet, Grade “C” PC Solid Sheet and Grade “B” PC Solid Sheet are non‑standard PC Solid Sheet that fail to meet official quality requirements. They are only fit for temporary applications, yet even for temporary use, their cost‑performance is unsatisfactory. Such sheets shall not be adopted as building engineering materials.

Since customers cannot easily distinguish Grade “C” PC Solid Sheet, Grade “B” PC Solid Sheet and Grade “A” PC Solid Sheet, the market for PC Solid Sheet is plagued by widespread irregularities. It is therefore essential to master how to select PC Solid Sheet and avoid purchasing non‑standard products simply for lower prices.

In the production of Grade “C” PC Solid Sheet and Grade “B” PC Solid Sheet, varying proportions of recycled materials are added. Recycled raw materials accelerate the aging process of PC Solid Sheet. Upon close inspection of the sheet interior, granular impurities resembling fine sand can be observed. Grade “C” PC Solid Sheet and Grade “B” PC Solid Sheet often suffer from insufficient nominal thickness, inadequate weight per unit area, and in many cases lack UV‑resistant coating for anti‑aging protection.

It is preferable to buy 2 mm‑thick Grade “A” PC Solid Sheet rather than 4 mm‑thick non‑standard Grade “C” or Grade “B” PC Solid Sheet.
The service life of PC Solid Sheet is not determined by thickness. A 2 mm Grade “A” PC Solid Sheet can deliver equally reliable durability.

How to verify genuine Grade “A” PC Solid Sheet

1. Inspect raw‑material quality: Peel off the protective film of PC Solid Sheet. Recycled‑material sheets contain visible granular impurities, while virgin‑material sheets appear clean and crystal‑clear.
2. Measure actual thickness: Use a measuring tool to check whether the real thickness matches the nominal value. For instance, if a sheet is claimed to be 3 mm thick but measures merely 2.7 mm‑2.8 mm, it is definitely non‑standard.
3. Weigh the sheet: Reference weight specifications for PC Solid Sheet are listed below:

• 2 mm = 2.4 KG/m²
• 3 mm = 3.6 KG/m²
• 4 mm = 4.8 KG/m²
• 5 mm = 6 KG/m²
• 6 mm = 7.2 KG/m²
• 8 mm = 9.6 KG/m²
• 10 mm = 12 KG/m²

1. Check the UV‑protective coating: The UV coating slows down sheet aging. You may purchase an affordable UV flashlight online for testing. Shine the UV light onto the top surface of PC Solid Sheet; fluorescence will be generated. Observe the outermost fluorescent layer: hair‑thin fine lines indicate the presence of UV coating. If testing equipment is unavailable, request an official anti‑aging warranty document from your supplier.