The laminate industry is a worldwide growing market with constantly new applications. Mondi Dynäs is a paper manufacturing company that serves the laminate industry with saturating kraft paper. Having a quick and reliable method for assessing resin uptake in the paper is imperative for both quality control and product development. This thesis aims to improve the understanding of resin uptake and evaluate different methods to measure liquid absorption. Currently, two methods are used at the mill for assessing resin uptake, one for measuring the penetration time of a model compound and another for measuring the resin uptake of the same compound. In this thesis, other methods are evaluated to detect if they correlate with the former two properties. The tested measurements are related to the porosity and surface characteristics, by testing a TAPPI method for liquid absorption, surface roughness, and Gurley. This project has also evaluated the role of paper formation. Visual methods such as SEM and visual image analyses, were used for the evaluation. Finally, a penetration dynamic analyzer (PDA) with ultrasonic waves was evaluated using different liquids. The result from the visual methods indicates that paper formation is important for paper impregnation, the findings suggests that it takes a longer time to penetrate larger fiber flocs than smaller ones. Contradicting to this, the data could not confirm any relation between the paper formation and the resin penetration time. Instead, a correlation between the paper formation and the method for the resin absorption was identified. It was concluded that poorer paper formation implicated higher resin content, this was later verified with SEM and BSE images of the resin attachment to the fibers. Theoretically, the PDA is a promising device for this kind of measurement and the obtained measurements exhibit some trends. However, the results from the PDA provided a too large scattering in the data for a correct evaluation and is in its current state not a useful tool for quality control.