Study on the Relationship between Amount of Printing Ink and the Reproduction of Tone

During the process of printing, the relation between ink amount and the reproduction of tones is focused. There are errors in the results, because the solid density is the subject while there are some difficulties in controlling of ink amount. If it is done in the real production and fine control of ink, the effect of ink amount on the tone replication of the different dot area rate are analyzed, it will be better to provide the basis of printing quality. The experiments were done in the printing machine of Heidelberg SM 52. The ink amount is increased by 5% once to print for many times. According to these samples, this paper is got the results of density of different dot to different ink amount, dot gain and contrast, the laws and the relationship between ink amount change and the tone replication. The research results show that there are different laws between ink amount and dot density , ink amount and dot gains. The solid density is determined by analysis of contrast.