What is Grayscale? How to use it?

Inspection Tools – Greyscale

 

What is greyscale?

Grayscale is used for assessing the color shading in between products and the customer’s approval sample or among pieces in production. Gray scaling has grades 1-5 and increases by half of the grade (1, 1 1/2, 2, 2 1/2, and so on.) with 5 being the greatest. Generally speaking, many overseas clients can accept above grade 4, while some can accept the grade 3-4.

Grayscale textile inspection

There are two types of Grayscale (Gray Scale)– one for evaluating ‘color modification’ and one for evaluating ‘staining’. The color change scale consists of nine sets of gray-colored chips, from grades 1 to 5.

How to use Grayscale?


For color staining. It mainly is used for examining staining after rubbing by dry and wet white cotton cloths, in a professional lab. The employee usually attaches one white cotton cloth to the sample. Then, they will put them together into a washing maker and observe the outcome. An inspector usually cannot perform this test on-site given that the equipment and time are restricted. Rather, an inspector may carry out a rub test for color staining. To do this, the Inspector ought to prepare 2 pieces of white cotton material: one wet and the other dry. The garments quality inspector will rub the production sample 10 times with both with a force 9N( 1KG).

Nowadays, a lot of 3rd party inspection companies are increasing their inspectors’ skills and training on how to utilize special tools to examine product quality. For example, during a soft-goods or fabric inspection, the most essential tools that will be used are newton meters, metal detectors, barcode scanners, Pantone books, and so on. While all these tools are important, the only way to assess the color shades accurately during a textile quality inspections is the Grayscale.


Greyscale expected results:

  1. There needs to be no color transfer even worse than grade 4 on a Grayscale (between the initial white fabric and the colored one) after the dry test.
  2. There must be no color moved even worse than 3-4 on a Grayscale (in between the initial white fabric and the colored one) after the wet test.
  3. In order to get the most from your outcomes, the inspector must make certain to analyze the technique and outcome and discuss it to the factory plainly.

The factory must be able to help, such as in providing great quality 100% cotton white fabric and supplying excellent room lighting and conditions. In a textile inspection, the inspector’s experience is extremely essential when performing this test, so make certain to utilize a trustworthy Quality Control Company provider!

How to use Grayscale
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