it has been observed in extensive tests that the colour in tensity used in practical printing for a particular combination of ink and paper is simulated very closely by presenting the paper with the same ink film thickness on the blanket that produces the colour specified in iso 2846-1 on the reference paper also specified therein. Under these conditions, the lower grades which tend to be rougher and more ink absorbent, take more ink off the blanket than higher grades which are smoother and have a high-quality coating. the following two methods each provide printing conditions where papers are presented with the same ink-film thickness on the blanket, give results that agree very well. for well-coated matte paper grades,if the coating surface is rough,the method tends to give an unrealistic high coloration.therefore,the results of coloration tets for gloss-coated papers are also useful for equivalent matte-coated papers.