Test Pen for the Heat-Soak Treatment

Prof. Ferdinand Trier, Ulrich Ranke, Munich University of Applied Sciences, Laboratory for Sol-Gel techniques

At the Munich University of Applied Sciences a test ink was developed, which is proving the correct examination of the heat soak treatment. A spot of the ink will be applied after tempering and before heat soak treatment onto the glass. The correct colour change of the mark will be displayed only, if the test was examined properly.

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The Authors