The main common defects that can occur in gravure printing are as follows:
Dot Skipping: This refers to small dots or areas not being printed correctly during the printing process, resulting in blank spots on the printed material.
Dot Gain: Dot gain refers to the spreading or enlargement of printed dots, leading to a loss of image detail. It can result in unclear or distorted images.
Line Defects: These defects may include broken lines, pattern interruptions, or discontinuous lines, often caused by inconsistent printing contours.
Color Inconsistency: The uniformity of colors can be affected by various factors, such as uneven ink distribution, insufficient or uneven pressure, and more.
Ink Buildup and Overflow: Excessive ink buildup or overflow on the printed material can lead to a rough or uneven appearance.
Feathering: Feathering refers to blurry, fuzzy, or unclear edges of patterns or text on the printed material.
Peeling and Adhesion Issues: Surface peeling or adhesion problems can occur on the printed material, often due to inappropriate materials or adhesive issues.
Shrinkage and Wrinkles: Shrinkage or wrinkles may occur during the printing process or subsequent processing, usually caused by material issues or improper handling.
Dust and Impurities: Dust, impurities, or stains can enter the printed material during the printing process, resulting in imperfect printing.
Gravure Plate Wear: Gravure plates that have been in use for an extended period may wear out, leading to irregular spots or marks on the printed material.
These defects can affect the appearance, quality, and functionality of the printed materials. To avoid these issues, gravure printing facilities typically implement strict quality control measures, including regular inspection and maintenance of printing equipment, the use of high-quality printing materials and inks, and training of operators to ensure that the printed materials meet the expected standards of quality.