1970–1979
1970s Polyester Shift Dress
Identifying Authentic 1970s Polyester Shift Dress
Authentic 1970s polyester shift dress pieces (1970–1979) are among the most sought-after items in antique fashion. Synthetic polymer fiber commercially introduced in the 1950s, ubiquitous by the 1970s. Excellent durability and wrinkle resistance; the defining fabric of 1970s fashion.
When examining a potential 1970s polyester piece, the most important diagnostic features are construction method, closure type, and fabric authenticity.A-line or straight-cut dress with minimal waist definition. The quintessential 1960s silhouette, worn by Audrey Hepburn and popularized by designers like Mary Quant.
Shift Dress Authentication Checklist
True 1960s: above-the-knee hemline; earlier versions hit at knee
Look for mod or geometric prints in bright, saturated colors
Synthetic knit fabrics common; wool shifts are higher value
Sleeveless or short-sleeve; check for back zip — metal pre-1963, nylon after
Identifying Authentic Polyester
Burn test: melts and beads up rather than burning; smells like chemical/plastic
Pre-1970 polyester: heavier, less refined than modern fabric
Double-knit polyester (1970s): thick, textured, extremely wrinkle-resistant
Check care label: fiber content labeling became mandatory in the US in 1971
Care & Preservation
Machine wash cold, gentle cycle. Do not use hot water or high-heat drying. Medium iron only. Polyester holds dye well — minimal fading risk.
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