Short-Time Water Absorption by Model Coatings , 2008 Advanced Coating Fundamentals Symposium

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Absorption of aqueous solutions into paper and board coatings is important in a number of printing technologies, not only inkjet printing but also flexography where aqueous based inks are frequent, and offset printing where the aqueous fountain solution has a strong impact on printability. An important difficulty in studying absorption into coatings is the small void volume of the coating which is in the order of a few cm3 per square meter for coatings designed for offset printing, but significant larger for coatings designed for inkjet paper. This paper presents a newly developed technique where it is possible to measure the absorption of very small amounts of aqueous solutions.