EAN-13	0000002007014
UPC-A	000002007014
Product Name	Bb Oven Rstd Trky Breast
Language	English
Category	Food
Short Description	Lb
Created	07-01-2006
Modified	12-15-2016 5:18:03am
MD5	e41c2b7158be0ab3f499d0389b1a64c7
SHA256	4b8abe0b215c8a9bccb8c5b06a52f74539403368c26c2c1047f97de4a391bd66
Search Google	by EAN or by Title
Query Time	0.0008180

Code 128 is a high-density 1D barcode symbology. This barcode set makes use of the entire 128 ASCII characters which include letter, number and symbols.

As with all barcodes, there are indicators to identify where the barcode starts and stops. These are marked in yellow below. Code 128 also has a check character which has been marked in green. The remainder of the barcode is the data being encoded. The text below the barcode is optional and is for human consumption in the event the barcode can't be scanned or if people also need to know what the code means.

Each character in the barcode symbol is composed of three bars and three spaces. Each bar or space must range from 1-4 units and the sum of all the width of all bars must work out to an even number. The stop marker is special because it adds an extra bar of 2 units at the very end (4 bars and 3 spaces). There are three different start markers to to identify which code set is being used. To represent all 128 characters, the code sets can be within a single barcode as needed by using control characters 98-101 (depending on the code set).

The check character is calculated by summing the value of each character and multiplying it by its position. The start character is also part of the sum but is added without weight (multiply by 1 just like the first encoded data character) then when you have the sum take the modulo 103 remainder. This gets a little more complex when mixing modes within a single barcode.