Leather - Determination of surface reflectance
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Our test laboratory performs testing according to DIN EN ISO 17502 under accredited conditions. This standard specifies a method for determining the reflectance of leather surfaces, particularly in the near-infrared (NIR) range. The purpose of the test is to objectively measure the light reflection of leather, which is especially relevant for applications exposed to sunlight, such as automotive interiors, upholstery, or military uses.
The standard distinguishes between leathers with and without sunlight-reflective properties and enables classification based on reflectance at a wavelength of 900 nm (other wavelengths within a defined range may also be used). Reflectance is expressed as a percentage, allowing determination of whether a sample can be classified as sunlight-reflective.
Measurement is carried out using a suitable spectrometer / reflectance measuring device, which records the proportion of reflected light as a function of wavelength. Samples are measured at representative locations to ensure a consistent evaluation of the surface.
The results provide a solid basis for material selection, quality control, and specification of leather for applications where temperature stability under solar exposure (IR reflectance to reduce heat buildup in dark leather materials – „Cool leather“) or visibility in military applications (reduction of IR emission to minimize detectability in night vision) is critical.