Slightly Light - Slightly light labels are, in some cases, preferred to slightly dark for “In Spec” bar codes. Both normal and rotated bar codes will be “In Spec”, but small alphanumeric characters may not be complete.
Too Light - Light labels are very obvious. Both normal and rotated bar codes have incomplete bars and spaces. Small alphanumeric characters are unreadable.
In Spec - The “In Spec” bar code can only be confirmed by a verifier, but it should exhibit some very visible characteristics. The normal bar code will have complete, even bars and clear, distinct spaces. The rotated bar code will also have complete bars and clear distinct spaces. Although it may not look as good as a slightly dark bar code, it will be “In Spec”. In both normal and rotated styles, small alphanumeric characters will look complete.
Figure 31. Bar Code Examples78 | Z Series™ User’s Guide |