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Vitralit® 1691 is a UV-curable, black-colored epoxy resin, which is used as a glob-top. As a special
feature the product has a thermal initiator, which allows the subsequent curing of shadow areas.
Vitralit® 1691 is distinguished by a high ionic purity (Na +, K +, Cl- <10ppm) and is extremely temperature-resistant. An important advantage of the conventional potting compounds is the fast UV
fixation of the surface. Due to the subsequent short thermal postcuring by IR radiation, there is no
limitation of the layer thickness.