Euler, Thorsten ; Feldmann, Jakob ; Spiehl, Dieter ; Dörsam, Edgar ; Blaeser, Andreas (2023)
Cyanotype – from hand craft to industrial print.
49th International Research Conference of Iarigai. Wuppertal, Germany (18.09. - 20.09.2023)
doi: 10.14622/Advances_49_2023_09
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Kurzbeschreibung (Abstract)

In this extended abstract, first, a history of cyanotype is presented. The aim of this research is to change the process of cyanotype from hand craft to industrial application. A test form is developed which serves as a photo mask for the cyanotype process. Printing experiments on an industrial, modular, label printing press Gallus RCS 330-HD are conducted at 5 m/min on foil and paper. The flexographic unit is used to apply the main components necessary for the cyanotype process, a UV curer is utilized for exposure and the gravure unit for washing out the remains with distilled water. This is a novel technique and application for the cyanotype process. Quality of the printed Prussian blue layers is evaluated using a spectrophotometer, measuring the CIE L*a*b* values of solid and halftone patches. The results show that the Prussian blue is homogeneously distributed over the printed area. As expected, small details are transferred well, since the cyanotype process has already been established for blueprints in the past. Future applications for cyanotype are discussed, as the presented industrial process gives the opportunity to fabricate, e.g., electrochromic (EC) devices, which can contain a Prussian blue layer within their layer stack. Thus, our process could serve as an alternative to coating processes for EC devices.

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