The following is a set of overall inspection solutions for the quality of tag printing:

Appearance inspection:

Cutting uniformity: check whether the edge of the tag is cut neatly and whether the size meets the design requirements. Generally speaking, the dimensional tolerance of the tag within 5cm can be controlled within 1mm, and the dimensional tolerance above 5cm can be controlled within 2 mm. If the cutting deviation is too large, it will not only affect the appearance, but also affect the matching degree between the tag and the product.

Burrs and burrs: check whether there are burrs and burrs on the edge of the tag. Burrs and burrs may scratch the user or affect the handle of the tag, and should be avoided as much as possible in the production process. You can gently touch the edge with your hand to feel if there is any unevenness.

Stains and dirty spots: under sufficient lighting conditions (such as standard fluorescent lamps), check the surface of the tag with a visual distance of 35-55cm for stains, oil stains, ink spots and other dirt. These defects may be caused by ink splash, environmental dust and other factors during printing. Slight dirt with small area, such as ink dots with a diameter less than 0.5mm, can be regarded as secondary defects if the number is small and does not affect the overall appearance; However, if there are obvious stains or dirty spots in the main position, or a large number affects the overall visual effect, it is regarded as a serious defect.

Scratches and scratches: check whether there are scratches and scratches on the surface of the tag due to production,

 transportation or operation. Shallow and short scratches may not affect the use, but if the scratches are deep, long or large, which destroys the overall appearance and integrity of the tag, it should be regarded as unqualified.

Folding and deformation: check whether the tag is flat, wrinkled, bent or deformed. Uneven tags may affect the subsequent binding, hanging or use, especially for some high-grade tags that require high flatness, even a slight deformation may lead to a decline in product quality.

Surface defect inspection:

Edge quality detection:

Text and pattern detection:

Text clarity: the strokes of the text should be clear and distinguishable, without blurring, smudging and ghosting. For smaller text, pay special attention to its clarity to ensure that consumers can read it easily. You can use a magnifying glass or a high-resolution image acquisition device to check the clarity of the text.

Pattern resolution: The lines of the pattern should be smooth and fine, with natural color transition, without mosaic and blurring. For tags with complex patterns or gradient colors, higher printing resolution is needed to ensure the quality. For example, some high-end brands may have exquisite patterns on their tags, and the printing quality of these patterns must reach a higher standard.

Text information: carefully check the text content on the tag, including brand name, product information, composition, size, washing instructions, etc., to ensure that it is consistent with the design draft or the information provided by customers, and there are no mistakes such as typos, missing words and multiple words. For example, the size information on the clothing tag must be accurate, otherwise it will bring troubles to consumers.

Pattern integrity: check whether the pattern on the tag is complete, and there are no problems such as missing, truncation and deformation. For the tag with a specific pattern or logo, the integrity of the pattern is very important to convey the brand image. For example, the brand's logo pattern must be clear and complete, without any damage or deformation.

Content accuracy:

Clarity and resolution:

Color detection:

Color accuracy: use color detection equipment (such as spectrocolorimeter) to compare the color of the printed tag with the standard color sample to ensure that the color of the tag meets the design requirements, and there are no problems such as color difference and color deviation. When testing, multiple positions should be selected for measurement to ensure the uniformity of color. For brands with strict color standards, the color deviation must be controlled within a very small range, for example, the δ E value of color difference should be less than a certain value (such as δ ΔE < 3).

Color uniformity: check whether the color on the surface of the tag is evenly distributed, and whether there are shades, spots, stripes and other phenomena. The uneven color may be caused by uneven coating of ink, unstable printing pressure or different absorbability of materials during printing. Color uniformity can be evaluated by naked eye observation or using professional image analysis software.

Detection of overprint accuracy: If there are patterns or characters with multiple colors on the tag, it is necessary to check the overprint accuracy. The overprinter error should be controlled within the allowable range. Generally speaking, the overprinter error between patterns or characters of different colors should not exceed 0.5 mm.. You can use a magnifying glass or microscope to check the accuracy of overprint and see if the edges of different colors are aligned.

Physical performance testing:

Material inspection: check whether the material of the tag meets the requirements, including the weight, thickness and strength of the paper. Different types of tag may need to use different materials of paper. For example, the tag of high-end clothing may need to use thicker and better paper, while the tag of ordinary goods can use more ordinary paper. The physical properties of paper can be detected by measuring tools (such as calipers and thickness gauges).

Adhesion detection: If there are additional decorations (such as metal wire, plastic sheet, rope, etc.) on the tag, it is necessary to check whether the adhesion between these decorations and the tag body is good. The firmness of the attachment can be tested by gently pulling or shaking to ensure that it will not fall off during normal use.

Overall effect evaluation: after the above tests are completed, the overall printing quality of the tag is comprehensively evaluated. Consider the appearance, text pattern, color, overprinter accuracy, physical properties and other factors of the tag to judge whether the printing quality of the tag is qualified. At the same time, it can be compared with standard samples or customer requirements to ensure that the printing quality of the tag meets the market demand and customer expectations. If quality problems are found, the reasons should be analyzed in time and corresponding improvement measures should be taken to improve the printing quality of the tag.