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L

LABEL

LBS In the US label stationery weights are frequently expressed in lbs.

The conversion factor to gsm is 3.75. Thus a laser printer specified for up to 50 lbs stock is able to handle label stationery with a weight of up to approximately 190 gsm.


LADDER BARCODE In connection with barcodes printed by thermal transfer printers this term is used to describe barcodes in which the bars are printed perpendicular to the media movement.

This term is also sometimes used to describe barcodes which are printed in documents or labels at 90 or 180 degrees orientation to the body of any accompanying printed text.


See quiet zone.


LIGHT SOURCE

LIGHTING See light source.

LINEAR BARCODE

M



MARKING See direct part marking.


MATRIX BARCODE A general type of 2D barcode.

See barcode.


Modulation is a graded test within the ANSI/CEN/ISO barcode quality test system.

Modulation is determined by the ratio of Edge Contrast Minimum (ECmin) to the Symbol Contrast (SC) of a barcode.

Modulation = ECmin/SC

If Modulation is greater or equal to 70%, grade = A or 4
If Modulation is greater or equal to 60%, grade = B or 3
If Modulation is greater or equal to 50%, grade = C or 2
If Modulation is greater or equal to 40%, grade = D or 1
If Modulation is less than 40%, grade = F or 0

Modulation is a measure of the sharpness of the bars and can be influenced by printing technology and other things such as printer hygeine.

For more details see the section on verification.

It is sometimes possible to improve Modulation by increasing the white space between the bars at the expense of the width of the bars. See the section on quality.


MSI PLESSEY

MULTIROW BARCODE See stacked barcode.

See barcode.


N

NUMERIC In connection with barcodes this refers to the limitation of the barcode method to represent numbers only.


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