Test Results, Conclusions, and Nest Steps in the Analysis of Factors Contributing to Variability in Web Offset Color Advertising Reproduction

The 1983 Spectrum test effort provided the Graphic Communications Association's Print Properties Committee with a better understanding of the mean and range of printed dot gain and density in among heat-set, web offset publication printing presses. Results prompted the Committee in 1984 to design a multi-condition test at one printing location to analyze more specifically causes of dot gain. Subsequently, a controlled, seven-site test focused on control of factors found to be key contributors, and explored further the application of GCA Par Curves. The paper reviews results of the test, plus offers a preview of the 1985 test effort, which will include additional ink-related testing and application of Spectrum results in the production of actual advertising.