7882 Scanner Installation and Owner Guide04/01 497-0419630 Release D16 of 58Determining Label QualityMany labels in a typical retail environment are unreadable. The following illustrationshows some of the common problems. Vendors and printers regularly supply productsto the market with bar codes that are overprinted, underprinted, or truncated. Somelabels have missing margins. Others may be printed around the corners of packages, oron media not likely to remain flat when picked up.0 1 2 3 4 6 7 85 90 60 1 2 3 4 6 7 85 90 60 1 2 3 4 67 85 90 6R00260 1 2 3 4 67 85 90 60 1 2 3 4 67 85 90 60 1 2 34 67 85 90 6Bar Code Scratched Bar Code Folded Bar Code TruncatedBar Code Torn Poor Color Contrast Red Bar Code OnRed BackgroundThe readability of a label depends on variables such as size, placement, color, papertype, ink viscosity, and package coatings. The middle of a printing run can yielderroneous labels due to the many variants involved. In particular, poor color contrastand marginal print quality can make a label hard to read.UPC bar code requirements are identified in the UPC Symbol Specification Manualthat is published by the Uniform Code Council, Inc. Contact the following for a copy ofthis document.Uniform Code Council, Inc.8163 Old Yankee Road, Suit JDayton, OH 45458Phone: 513-435-3870Contact the following for information on Code 39 or "3 of 9" bar code labels.AIM – USA634 Alpha Dr.Pittsburgh, PA 15238-2802Phone: 412-963-8588EAN bar code requirements are identified in General Specification for ArticleSymbol Marking, Copyright EAN-1977.