QUOTE(CLsoo @ Dec 12 2017, 02:04 PM)
Raytech Ultra 70 - VLT 73%, TSER 58%
Huper Ceramic 60 - VLT 60%, TSER 42%
3m crystalline 70 - VLT 68%, TSER 50%
vkool elite - VLT 73% , TSER ?? (cant found tser)
haverkamp 70 , VLT 70%, TSER 50%
just wondering how you get this TSER 58% ? Do you mind to explain the way you get TSER 58% ?
raytech 70 is 15% more compare with others film in market. All Tint Film model above IRR should all is 90% above. With same IRR & VLT , how come Raytech 70 have big different compare to others ?
Hi, thanks for providing the info. The specification of Raytech products are provided by the laboratory of our manufacturer. Different manufacturer will have different ways to measure Infrared-red rejection (IRR). They are measured our products with wider band of wavelength for IRR. So overall TSER is better.
In technically, Infrared-red rejection (IRR) has a wavelength from 780nm-2500nm, which is meaning the entire IRR “band” is 1,720 nm wide. Different of window film manufacturers report performance for IRR in a variety of ways because there is not one, uniformly accepted test method for measuring IRR. Each manufacturer measures IRR differently, generally at a single point or narrow range at which the film may perform great and thus, best marketed in that range. For example, 3M products is measured under wavelength band 900-1000nm ONLY. It has 97% IRR in that band only but does not mean it has same results in overall wavelength.
Some specific examples of these claims include:
Product A: A product manufacturer reports the Infrared-red rejection (IRR) at only one wavelength, 1000nm, where the energy from the sun has already significantly tapered off.
Product B: A manufacturer of a product chose to report the IRR at 1025 nm, which carries about 10% less solar energy than reporting it at 1000 nm.
Product C: The manufacturer chose a point to the far right of the spectrum, out in the near infrared at approximately 1450 nm, where there is almost no solar energy left.
Product D and E: Manufacturers not reporting a specific wave length or range of wavelengths over which they make their IRR claims.
Product F: The manufacturer of this product only reports their IRR number between 900nm and 1,000nm, for a total bandwidth of 100 nm. Noting that the entire IRR band is 1,720 nm wide, this figure represents about 6% of the entire width of the IRR. Therefore, the IRR reported by this company ignores 94% of the infrared wavelengths.
Lastly, Raytech emphasize consumers to test window film by BTU solar power meter instead of IRR meter because BTU meter can show how much of the total solar heat can be rejected by a window film
You are welcome to visit our branch to see product demo personally. We can test products by BTU solar meter and do comparison for few brands with meter for u to understand
This post has been edited by Lord Gitsy: Dec 13 2017, 02:01 AM