Identify the material that may transfer
Map where the dark pile meets light piping or a second fabric. ACT describes dry and wet crocking for woven upholstery. For a knit or coated candidate, ask which applicable guidance and method the supplier uses.
Approve a sewn contrast sample
Use the offered dark colour and the intended light trim. Ask the supplier for evidence tied to the offered colour and finish. Keep any workshop screening separate from the laboratory result on the purchase specification.