4.Versatility of HPL
Projection screens normally feature a white, matt surface, so that the impinging light from projectors is scattered evenly and diffusely and no distracting reflections are created. These features fulfil the requirements for projection screens in offices and classrooms. HPL surfaces can be manufactured with these features. The gloss level should be as low as possible (measurement at 60° angle). HPL surfaces with gloss levels ≤ 10 are suitable for reducing reflections. Higher values (10 – 20) can be used with some limitations, i. e. reflections may occur at certain viewing angles. Extremely matt HPL surfaces have gloss levels of approx. 2 – 5. They are finely textured.
