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Field
W/N
NEW
RMIN
CONTRAST
MOD
DEFECT
A-61139 March 2000
Table 2 identifies the most common causes of low bar code
ratings/grades.
Table 2 — Common Causes of Low Bar Code Ratings
Problem Type
Dimensional
Reflectance
Reflectance
Reflectance
Upon completion of the test:
Remove the bar code from under the scan head if a Static Bar Code
Evaluation has been performed.
Press C to return to normal operation, or press Stop to remain in the
test environment.
Cause
Bar codes not printed according to
specifications (refer to Kodak publication Bar
Code Made Easy, A-61099).
Inaccurate measurements due to:
Ink smearing (improper curing)
Ink spreading (use of super-absorbent
paper)
Use of dot matrix printers (ragged edges)
Bar elements are too light often caused by:
Use of old ink ribbon
Hammer pressure too light
Defective/dirty print head
Space elements are too dark often caused by:
Dark colored paper background
Stain on paper
Bar code element edges are ragged rather than
straight often caused by use of a dot matrix
printer.
Bar elements contain voids (white spots) often
caused by:
Use of old ink ribbon
Hammer pressure too light
Defective/dirty print head
Space elements contain dark spots often
caused by:
Paper with flecks
Ink smearing (improper curing)
Ink spreading (use of super-absorbent
paper)
Defective/dirty print head
Toner contamination (if using a laser printer)
9-17
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