韓國 新聞 印刷에서 濃度의 均一性 向上에 관한 硏究

Abstract

Looking around the environmental characteristics in the newsprinting of newspaper we always read in our everyday life, we have to make newsprinting at the same time within the limited timeframe and to effectively keep the consistent quality of the same image at every newsprinting factory in the whole country, which is substantially difficult due to a variety of restrictions. These characteristics have caused readers and advertisers to file complaints and newspaper companies to subsequently increase cost.

Until now the measure against these problems is that the printer's proof is divided in pieces and distributed to the factories in the metropolitan area for newsprinting. Being divided in pieces, it is very difficult to estimate the color impression on the whole. And even a divided printer's proof in a piece has not been provided to the factory outside metropolitan area. In order to overcome these barriers, the printer's proof has been used with a color print. However the difference of the color impression and the absorption characteristic between color printer's paper and newsprint causes to make difference between the printer's proof and actually printed newspaper. Eventually, the newsprinting has been proceeded depending on the operator's subjective decision at each factory in the whole country.

The necessity to settle the outstanding problem has come to the fore. First it is required to find out the factors affecting on the news-printing quality, and proper remedy and control for the affecting factors should be prepared. It is finally needed to adopt the appropriate management tool for the consistent quality all over the news-printing factories. This study identified the effective factors affecting on newsprinting and the optimum conditions based on these factors. We also determined the composition combination of the gray balance bar suitable to the newsprinting, as the proper tool for maintaining the consistent quality at each the newsprinting factory, and analyzed its effects on newsprinting after having applied the gray balance bar into the actual design of newspaper print. The application of the gray balance bar into the news-printing of the domestic factories has turned out to be excellent.

The composition of the gray balance bar was calculated applying the Dot-Area Correlation Equation of C, M and Y. When calculating the equation with 22% of C, both M and Y were 15%. This composition rate is almost the same scale to that of the subjective evaluation, which was C:22%, M:15% and Y:16%. In this study, therefore, we adopted the color of gray with C:22%, M:15% and Y:16% as the best gray balance bar matched with the design of newspaper. Also, the above-mentioned gray balance bar has been actually applied into 5 newsprinting factories for one month, and through this application it is confirmed that the density of printed newspaper is stable and well-balanced and shows excellent quality within the acceptable error range, which we consider is experimentally proved.