Usually, ribbons are manufactured with certain errors due to various reasons such as raw materials, production process, and operation. The ribbons produced from different batches, or even from the same batch of fabric, may have different colors. The magnitude of the fabric color difference will vary depending on the color light source, as well as the color environment and color time. Therefore, in order to accurately evaluate color difference and ensure consistency of color matching results, when visually evaluating colors, the color of the light source specified by the customer must be selected in the standard color light box to avoid visual differences caused by non-standard light sources or different light sources.
Color Fastness of Ribbon
Color fastness is the most important indicator to measure the quality of the ribbon. The main concern of color fastness is abrasion resistance, water resistance, light resistance, sweat resistance and brush resistance. These items are primarily evaluated based on the use of the product and are tailored as needed. Color discoloration of ribbons produced by ribbon factories can be a major or minor problem. If the ribbons used for clothing accessories change color during the washing process, they can contaminate the entire garment or the garments that are washed together, and thus discolored ribbons are often a serious turn-off.
The so-called color fastness refers to the color of dyed textiles in the physical and chemical effects of color to maintain a solid degree, that is, the color of dyed textiles to the external influence of the fastness is called dyeing fastness. The color change of the specimen and the evaluation of the degree of white cloth dyeing after the test both indicate the dyeing fastness.
In each item of color fastness, the most commonly used color fastness are rubbing color fastness, washing color fastness, perspiration color fastness, light color fastness, water immersion color fastness and weathering color fastness. In practice, the items evaluated are primarily based on the end use of the product. Among other things, perspiration resistance, dry rubbing resistance and water color fastness are required by the basic safety technical specifications for textiles. In addition, saliva color fastness to saliva must also be evaluated in the case of textiles for infants and toddlers.
The evaluation of color fastness generally adopts the visual evaluation method, that is, the gray sample card is used as the standard sample, and under certain light and environmental conditions, the gray card and the sample are compared with human eyes to determine the original discoloration of the sample and the staining level of the white cloth. Gray cards (discoloration and staining, respectively) have five fastness grades, from 5 to 1. The best is grade 5 and the worst is grade 1. In each of the two levels, a half level is added, namely 4 5, 3 4, 2 3, 1, so our daily gray card is 5 grades and 9 grades, and the dying fastness evaluation result is one of 9 grades. If the color fastness of a ribbon product does not reach the level specified in the standard, the ribbon product is unacceptable.