In general, the factors affecting the fastness of textile products are: the properties and quantity of dyes used, the selection of dyes suitable for the textile product, the type and amount of bonds between the fibers and the dyestuff molecules, and the correct and sufficient finishes after dyeing and printing. Depending on these factors, color loss occurs in dyes applied to textile products or paint spreads to create contamination in the color of adjacent material. In this respect, fastness assessments are very important in textile sector.

Smoke and toxic gases emitted by burning substances have negative effects not only on human health but also on textile products. High temperatures, fumes and gases and the duration of exposure to combustion are a major factor in the loss of color.

Only the composition of the smoke contains water vapor and hydrocarbons and is less dangerous to textile products unless toxic gas is present. They are mainly burnt gases affecting dyes.

Depending on the area of ​​use, burnt gas smoke fastness properties are also added to various textile products. In order to determine these properties, burnt gas smoke fastness measurements are made in textile products. When evaluating these test results, the gray scale used in the fading assessment is used to determine the color change (TS 423-2 EN 20105-A02).

In addition, authorized laboratories determine burnt gas smoke fastness according to the following standards:

• TS 7561 EN ISO 105-G02 Textiles - Color fastness tests - Part G02: Color fastness to burnt gas fumes
• AATCC 23 Color fastness to burnt gas fumes

It is important that the laboratories that will carry out these tests are accredited from national or international accreditation organizations in accordance with the TS EN ISO / IEC 17025 standard, in terms of quality and reliability of the results.