Why can't the barcode just printed out be scanned

Many customers are asking why the barcode scanner can't scan out or what is the problem.
1. The barcode is deformed. The barcode is a relatively precise symbol system. Various code systems have corresponding ratios. If the barcode is impaired at will during the barcode-making process, the barcode cannot be recognized, especially when using Coreldraw When drawing software to make barcodes.
2. The vertical breakage of the barcode usually occurs when a barcode printer is used to print barcode labels. The main reasons are broken needles on the print head and wrinkled ribbons.3. The width of the barcode's blank area is insufficient. The left and right blank margins of the barcode must be at least 10 times the width of the narrow bar.
bs with black bars on red background can be read, and the barcodes with purple bars on yellow background can be read. Generally, the barcodes with red bars on a white background cannot be read, and the barcodes with black bars on a blue background cannot be read.4. There is a problem with the color matching of the bar and the space of the barcode. The difference in reading the barcode depends on the color of the bar. The color with high reflectivity will be recognized as a space, and the color with low reflectivity will e recognized as a bar. Generally, blue bars on a white background The barcode
5. The barcode printing effect is not apparent, usually because the medium does not match or the printing density value is set too low.