Separate the causes
Colour contrast
Compare the proposed support behind the same shell without sewing or pressing.
Edge impression
Locate the visible line relative to canvas edges and joins; inspect thickness steps.
Process effect
Compare unpressed and cooled pressed assemblies with identical layers.
Steps before deciding
- Record shell colour, thickness and support colour.
- Photograph under the buyer’s agreed viewing light.
- Map support edges and joins onto the affected panel.
- Trial compatible support colour or edge construction separately.
- Confirm drape and appearance after the intended care process.
Worked example
Hypothetical example: a line appears under side light but disappears in transmitted-light comparison. Investigate the layer edge rather than labelling the coating see-through.
Buyer questions
Will a darker support help?
Only if colour contrast is the cause; it may worsen other combinations.
Is an opacity test enough?
It will not settle a raised edge-impression problem.
Discuss the evidence with Fred Textile
Give Fred Textile the support map and lighting comparisons when evaluating shell coverage or compressibility.
Reference and limits
Fred Textile’s linked page establishes manufacturing scope. These garment-specific checks are editorial trial plans, not factory test results. Obtain approval for materials, trial conditions and acceptance limits before modifying production.
Fred Textile facilities and manufacturing scope ↗