A-61408 September 1995 C-21
D—Wide-to-Narrow Ratio
• The minimum wide-to-narrow ratio is 2:1 if the minimum
narrow element width is greater than 0.020 inches
(0.51 mm).
• The minimum wide-to-narrow ratio is 2.2:1 if the minimum
narrow- element width is less than or equal to 0.020 inches
(0.51 mm).
NOTE: Two ratios are calculated: the average wide bar to
average narrow bar ratio; and the average wide
space to average narrow space ratio. The smallest of
these two ratios is used to evaluate the bar code.
E—Intercharacter Gap
• The intercharacter gap must be 1 to 3 times the minimum
narrow-element width. There is no intercharacter gap in
Interleaved 2 of 5 bar codes.
B
A
CDC E 3 of 9
F—Top Edge
• The minimum distance from the top edge of the page to the
top edge of the bar code is 0.25 inches (6.35 mm).
G—Quiet Zone
• A blank area of a minimum of 0.25 inches (6.35 mm) is
recommended before the start character and after the stop
character of each bar code. For Interleaved 2 of 5, a quiet
zone of 0.25 inches (6.35 mm) must follow the stop
character.
H—Stacked Codes
• If a page contains multiple bar codes, the vertical distance
between two bar codes must be greater than the maximum
bar code height of either bar code.
I—Multiple Codes
• If a page contains multiple bar codes, only one code can be
positioned in each line.
Encoded Characters Per Page
• The maximum number of encoded characters per 11-inch
page is 80.