In order to be competitive and to meet global brand’s printing requirements, conventional printing is increasingly moving toward standardization. The principal international standard for offset printing is defined ISO 12647-2. The latest revision of ISO 12647-2 (2013) includes ∆E00 as the tolerance metric for deviation assessment, as the traditionally utilized ∆E*ab lacks visual uniformity. However, the tolerance value for ∆E00 from ISO 12647-2 (2013) is informative only. In addition, there is no justification given for how the published ∆E00 values were derived.
This research devised a method that uses the %Pass approach in a database to determine the equivalent tolerances between ∆E*ab and ∆E00 and to examine the merit of setting equal or unequal ∆E00 tolerances among CMYK solids. The findings indicate that (1) equal %Pass will result in unequal ∆E*ab-to-∆E00 tolerances, (2) ∆E00 tolerance for K solid does not have to be larger than Cyan and Magenta solids, and (3) ∆E00 tolerance for Yellow solid can be smaller than Cyan and Magenta solids.
Printing standardization and certification bodies are encouraged to apply the methodology with larger databases, including non-conforming jobs, to assess the performance of current printing specifications in the graphic arts industry. Their findings are the best impetus for future revision of printing standards.
Library of Congress Subject Headings
Color printing--Quality control; Color printing--Specifications
Print Media (MS)
Department, Program, or Center
School of Media Sciences (CIAS)
Yu, Lufei, "Tolerance Equivalency between ΔE*ab and ΔE00 Metrics" (2015). Thesis. Rochester Institute of Technology. Accessed from
RIT – Main Campus