Guidance Note – Openness coefficient

This guidance note explains that it is the visible light transmittance that is the relevant measure of light ingress through a fabric rather than the openness of the fabric.

Download here: BBSA Guidance Note 17A – Openness Coefficient

We are using cookies on our website

Please confirm, if you accept our tracking cookies. You can also decline the tracking, so you can continue to visit our website without any data sent to third party services.