โ Scribed by Coupe, R. R. ;Hsu, Baysung
No coin nor oath required. For personal study only.
The penetration o5 varnishes and inks into supercalendered paper under pressure was studied by means of reflectance measurements. The penetration appeared to be proportional to the square root of the ratio of the magnitude and duration of the applied pressure to the viscosity. This relationship is in agreement with the classical physical law for the viscous Ilow of Iluid into a porous medium. It is also concluded that Ior the systems studied the ink penetrates, under the applied pressure, as a homogeneous body into the paper with no Iiltration of pigments from the carrying varnish.
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