The ISO 12870 describes a test of the bridge deformation under load and check the fit of
the lens in the eyeglass frame.
The left lens is mounted between two annular clamping jaws. Then the right lens is moved with a rod up to 8 mm up to a force of 5 N. After 5 s the glasses is relieved and the deformation is measured after 20 s. The permanent deformation shall not exceed 2% and the spectacle frame may occured no cracks or breaks.
|Dimension(B,T,H)||ca. 200, 200, 300 mm|
1 Test Device
1 Operating Instruction
|Bridge Deformation Test manuel||620-010||3.880,- €|
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