Establishing Initial Baseline Technical Dossiers for Textile Qualification
Textile qualification requires mapping baseline chemical limits and physical standards to accredited lot-level test reports before releasing purchase orders.
Dry Crock Fastness
Color Transfer
Physical friction between a white cotton square and a dyed fabric surface defines this laboratory procedure. Dry crock fastness represents the numerical grade assigned when mechanical abrasion occurs without the presence of moisture. This evaluation method monitors how much pigment migrates from a textile substrate onto the test cloth under controlled pressure.
Evaluation Protocol
Technicians mount the fabric sample onto the base of an AATCC crockmeter. The weighted finger travels across the surface twenty times to simulate repeated contact. A standard grey scale provides the objective comparison for the resulting stain.
Performance Expectation
Mills establish passing requirements based on the intended end use of the garment. Dark synthetic blends or heavily printed goods require higher resistance to avoid marking lighter components during warehouse storage or retail handling. Consistent low scores indicate poor fixation of the dye particles within the fiber matrix.
Material Constraint
Synthetic fibers often retain surface residue from the finishing bath that causes artificial failures during the testing cycle. Pre-washing stages effectively remove these loose pigments before the final verification occurs. High-performance polymers exhibit predictable migration rates under friction while natural fibers demonstrate dependency on the quality of the mordant application.
A low result in the dry test environment indicates poor chemical bonding between the dye molecule and the polymer chain.