Lab Testing Procedure of Dyed and Printed Fabric

The lab test can be done before the fabric dyeing and printing process. At that stage physical properties of a fabric, such as yarn counts, fabric construction (EPI and PPI), fibre contents etc. can be tested. Although fabric tests such as the Fabric Package Test (FPT) are normally performed after the dyeing and printing processes.

Normally fabric parameters are tested on finished fabric or on the finished garment. Each buyer has a set of test requirements which are mentioned in their quality manual and a copy of test requirements is forwarded to their nominated labs.

For fabric package testing (FPT) you need to send fabric samples to a testing lab that is nominated by your buyer. The testing lab will do all tests that are required by the buyer for approval of your fabric that is going to be used in garment making.

If you are only looking for dyeing and printing testing done from the lab for buyer approval then send dyed and printed fabric samples to the nominated testing lab in your location and ask a testing team to perform only printing and dyeing-related tests.

In this case, generally, the following parameters are tested

• Color fastness test (to wash, daylight, perspiration)
• Color fastness to rubbing
• Color bleeding
• Chemical test for toxic material and carcinogenic contents.

After the lab test, the lab will provide you with a complete fabric test report. This report will contain buyer requirements for each test parameter and the actual test result on each parameter. When the test result meets the buyer test requirement you get a fabric approval report.

You have to submit a copy of the Lab test report to your buyer for the approval of the further process for fabric. In the following, we have shared a lab testing machine used for testing color fastness. 

Color Fastness To Washing Tester by Chiuvention 

Related Post: What are GPT and FPT in Textile Testing?