Identify what changed before choosing a remedy
Smaller and denser after washing
A more compact surface, reduced dimensions and changed handle can indicate felting, especially after wet mechanical action. Preserve an uncleaned swatch and the cleaning record. Do not promise that conditioner or pulling will restore felted coating; ask a textile-care specialist to assess the garment before another treatment.
Shorter after steam or pressing
Check cloth dimensions before cutting and again after the actual pressing sequence. A first dimensional change can involve relaxation of manufacturing tensions; it is not the same diagnosis as felting. Compare a second agreed cycle and the surface appearance. Trial preconditioning on sample yardage rather than steaming every roll without validation.
Puckered seams or a pulling lining
If the shell swatch remains stable but the finished coat distorts, inspect lining, interlining, fusible areas and seam construction separately. Compare matching unassembled and assembled samples. A shell-only result does not prove that a lined or bonded coat will keep its shape.
A practical sample-to-bulk dimensional check
- Define the intended care route first: professional cleaning, permitted hand washing or verified machine washing. Record drying and pressing too; do not substitute a harsher household cycle for the agreed test.
- Identify article, colour, roll and sample stage. Keep an untreated reference. Mark lengthwise and crosswise measurement distances without tension, using the lab's agreed conditioning and measurement procedure.
- Run the selected method and cycles on representative finished fabric. Measure again under the same conditions. Record length and width separately, together with texture, nap, shade and any growth.
- Test the garment assembly with its intended lining, interlining and pressing settings. Photograph seams, hem and lapels; check whether components respond differently.
- Agree a dimensional tolerance and appearance limit for this design before approval. Compare sealed sample and bulk under the same method. Hold a changed lot for investigation and re-test rather than applying a universal pass percentage.
Worked example: calculate each direction separately
Illustrative arithmetic, not a Fred Textile test result: a marked length changes from 100 cm to 97 cm. Dimensional change = (97 − 100) ÷ 100 × 100 = −3%; expressed as shrinkage, that is 3%. If a width changes from 100 cm to 99 cm, width shrinkage is 1%, not 3%. Do not average the two to approve a coat: the panel grain and component fit matter. State the sign convention in the report, then compare each result with the agreed design tolerance. A larger fabric cutting allowance is not a cure for continuing felting or a mismatched lining.
Questions before cutting or claiming washability
Does a wool blend prevent shrinkage?
Not by itself. Fibre composition, construction, finishing and care conditions all need consideration. Compare the actual finished articles and complete garment; neither a lower wool percentage nor a heavier GSM establishes a reliable shrinkage limit.
Should all wool coating be prewashed?
No. Use the intended care route and validate a trial first. A dry-clean-only tailored coat is not made washable by testing a loose swatch in water. Ask the fabric supplier and garment maker to agree preconditioning, pressing and care instructions before bulk cutting.
Ask Fred Textile about your coating programme
Send Fred Textile the article or swatch, composition, GSM, usable width, coat construction and intended care route. For an existing issue, add before/after dimensions, roll identification, cleaning and pressing records, and photographs. Ask for candidate samples and an article-specific test plan; available finishes and commercial terms need confirmation for your order.
Technical background and limits
Woolmark explains the fibre mechanism behind felting and shrink-resist treatments. The measurement example and troubleshooting sequence here are editorial guidance, not a certification or test report for Fred Textile. No machine-washable claim is made for an untested article.
Woolmark: Machine Washable Wool ↗