Colour collection – VPS / PR
This series of unleaded colours is characterised by its low thermal expansion coefficient, which is specially harmonised for decorating borosilicate glass. The main field of application of these colours is the decoration of ampoules, syringes and bottles for the pharmaceutical industry, chromatography, and for chemical, laboratory and cosmetics requirements. Special applications for flat glass, such as the toughened safety glass process, must be tested on a case-by-case basis.
600-630 °C slow firing
630-700 °C fast firing
The average coefficient of thermal expansion of the base frit lies within the range of 50-300 °C at 56 x 10-7/°K and 64 x 10-7/°K.