During a standard product inspection, the textile inspector performs the rub test. To do so, he rubs a white cloth against the material with sufficient strength . The rub test should be done first with a dry cloth, then with a wet cloth. The color transfer is then compared with a grey scale.
Several procedures exist to check the textile color fastness off-side. The most popular is by washing the item in a washing-machine, "label wash", with a white cotton cloth. Before and after washing, the textile quality controller takes pictures of the white cloth and the critical areas where two colors are close to each other. Then he compares it against the grey scale.
The samples should be sent to an official laboratory to obtain the most reliable results based on standardized procedures. The laboratory will perform textile color fastness tests according to different materials. This testing method is defined by the norm ISO 105 and includes:
Each of these tests costs less than $50. They assure the products are sellable after shipment and storage.
And you: would you like some additional information about those tests?