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Fibre & Material Dating
Synthetic fibres entered the market on specific dates — a fibre name can rule out an entire era.
| Marker / Feature | Era / Value | Research Detail |
|---|---|---|
| Nylon | From 1939 1939 onward | The earliest mass-market synthetic. A non-silk synthetic fibre cannot predate 1939. |
| Acrylic (Orlon, Creslan) | From 1950 1950s onward | Acrylic fibres appear from 1950 and are common in early post-war knitwear. |
| Polyester (Dacron) | From 1953 1953 onward | Polyester appears from 1953 and reaches peak market saturation in the 1970s. |
| Lycra / Spandex | From 1959 1959 onward | Lycra indicates early stretch technology and is common in late-1960s activewear. |
| Qiana nylon | Late 1960s 1970s | A high-end, silk-simulating nylon iconic of late-1960s and 1970s fashion. |
| Woolmark logo | From 1964 1964 onward | The Woolmark certifies 100% wool. The 'Woolmark Blend' mark, signifying 60% wool, postdates 1971. |
| Wool Blend mark (50%) | From 1999 1999 onward | The 50% 'Wool Blend' mark did not appear until 1999. |
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