Avery Dennison 9400 Series Programmer Manual - Manual (Page 73)

Bar Code Densities
Because the 9465 printhead has more dots per horizontal
inch, parallel bar codes on the 9465 only have a higher density
than serial bar codes. (Bar code densities are the same on
the 9425, 9445, and 9474 printers for all bar codes, and on the
9465 printer for serial bar codes.) The samples below show
the difference between parallel and serial bar codes.
Serial Bar Code Parallel Bar Code
Q
u
ick Ref
e
ren
ces
6. Quick References
6-7