UV protection and heat rejection: why they are different

UV rejection answers one specific question

A UV rejection figure describes ultraviolet radiation blocked under the stated test conditions. It does not measure rejection across the entire solar spectrum. Visible and infrared solar energy also contribute to heating, so UV performance alone cannot establish total heat rejection.

Keep the specifications separate

A product can offer strong UV filtering while having a different overall solar performance from another UV-filtering film. Compare UV rejection for the UV requirement, VLT for light transmission, and TSER for total solar energy rejection. Review any infrared figure with its test notes.

Also ask which UV wavelength range is covered. A general “UV protection” statement does not replace a clearly defined measurement, and it should not be read as a blanket claim about every wavelength.

Write a clearer enquiry

Instead of asking only for “99% UV film”, send a short brief with the following items:

• Application and intended glass type.
• Target light-transmission range.
• UV specification and test range to confirm.
• TSER and infrared data to review.
• Sample models and quantity needed for evaluation.

Use the poster as a conversation starter

The illustration separates UV, visible light and infrared to explain the categories. It is not a measured spectrum or a performance test of a VEYMAN model. For purchasing decisions, use the model-specific technical data and the corresponding physical sample.

Keep UV and solar requirements as separate lines on your approval sheet. That makes it easier to explain the selected product to a distributor, installer or private-label customer without confusing one benefit with another.

Quick questions