France · Textile finishing; Silk craft; Lyon heritage

Lyon Silk Finishing

Apprêt et Décatissage de Soie Lyonnais

The finishing of woven and printed Lyon silk fabric — including calendering (passing through heated rollers to produce luster); decatizing (steam pressing to stabilize dimensions); and historically silk weighting (adding metallic salts to increase drape and weight). The finishing stage determines the final hand and appearance of Lyon silk — the same woven fabric can feel completely different depending on the finishing applied. Silk weighting (now largely discontinued for environmental reasons) was once the most commercially significant Lyon finishing technique.

Risk level: Stable · Not listed

Alternate Names
Apprêt de soie; décatissage; calandrage; weighting silk; grammage de soie
Geographic Center
Lyon — finishing ateliers along the riverside (Saône) and in the industrial arrondissements
Community / Ethnic Group
Lyonnais
Estimated Origin
18th century (silk finishing documented as a distinct trade from this period); silk weighting peak 19th century; calendering and decatizing continuous
Cultural Function
Lyon silk's legendary 'hand' — the way it feels in the fingers; its drape; its weight — is determined as much by finishing as by weaving; the finishing atelier is the final quality gate before Paris haute couture receives the fabric
Primary Materials
Woven or printed silk fabric (from weaving or printing ateliers)
Primary Tools
Calendar (heated rollers — various pressures and temperatures); decatizing machine (steam press); inspection table (with raking light)
Process Overview
Silk fabric inspected; moisture adjusted; calender pressure and temperature set for fabric type; test length passed through; mirror-line reading at exit; pressure adjusted if needed; full fabric calendered; decatized with steam for dimensional stability; final inspection
Traditional Applications
Finishing all Lyon silk fabric before delivery to Paris haute couture; historical silk weighting for commercial weight-by-yard trade
Contemporary Applications
Finishing all current Lyon silk production; sustainable finishing chemistry development
Notable Practitioners
Lyon finishing ateliers (names generally not public); approximately 10–20 active operations
Key References
L'Apprêt de la Soie (UNITEX); Centre International de la Soie; https://www.soierie-lyon.com
Verification Status
Partially Verified

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