'Synthetic No. 1' Fibre Developed in Japan — Precursor to Vinylon

A key starting point for Japan's synthetic-fibre industry.

Industry, infrastructure and technology changed rapidly between 1938 and 1946, reshaping production, mobility and the material foundations of war and post-war recovery.

The principal source supports the period April 1939 for “'Synthetic No. 1' Fibre Developed in Japan — Precursor to Vinylon”, but it does not justify assigning a single calendar day. WWII CHRONOS therefore preserves the event with a partial date rather than inventing one.

Verified figure or fact: A key starting point for Japan's synthetic-fibre industry. Physical measurements in WWII CHRONOS are expressed in the metric system.

This chemical industry / textiles milestone helps explain the material systems behind the era: factories, energy, transport networks, extraction, communications, new materials and production methods.

Where an industrial achievement was tied to war, coercion or forced labour, the technical accomplishment must be read together with that human and political context rather than celebrated in isolation.

Editorial status: Month and core fact verified; no unsupported day assigned. The source below supports the period and central claim; unsupported details have deliberately not been added.

Source: View historical source ↗