K and N Ink Absorbency Test

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A test used to quickly determine the degrees of ink absorbency for various papers, in which a nondrying ink containing a soluble dye is thickly applied to several overlapped paper samples and allowed to sit for two minutes. The ink is then wiped off the samples, and the different degrees of color depth of the ink stains on the various samples are compared, the greater density of color indicating the highest ink absorbency. The K and N test provides best results on coated papers, and can also be used to test the uniformity of ink absorption across the surface of a single sheet. (See also Ink Absorbency and Vanceometer Test.)