Low Bar Code Ratings - Kodak 500 User Manual

Low Bar Code Ratings

Field Problem Type
W/N NEW Dimensional
CONTRAST RMIN
MOD Reflectance
DEFECT Reflectance
A-61408 September 1995
The following table identifies the most common causes of the low
bar code ratings/grades:
Cause
Bar codes not printed according to specifications (refer to Bar Code Specifi-
cations ).
Inaccurate measurements due to:
• Ink smearing (improper curing)
• Ink spreading (use of super-absorbent paper)
• Use of dot matrix printers (ragged edges)
Reflectance Bar elements are too light. Causes:
• Use of old ink ribbon
• Print hammer pressure too light
• Defective/dirty print head
Space elements are too dark. Causes:
• 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). Causes:
• Use of old ink ribbon
• Print hammer pressure too light
• Defective/dirty print head
Space elements contain dark spots. Causes:
• Paper which contains flecks
• Ink smearing (improper curing)
• Ink spreading (use of super-absorbent paper)
• Defective/dirty print head
• Toner contamination (if using a laser printer)
C-17