The standard provides a measuring method and the associated calculation method for determining the light transmittance (r) of samples of non- or only to a limited light-scattering single or multiple flat glass products, which are used as greenhouse covering material in horticulture. Note Correct measurement is not possible with completely homogeneous, diffusely scattering samples.
NEN 2675-1990 history
1990NEN 2675-1990 Greenhouse glass - Determination of the light transmittance