was used in the production of felt, which was commonly used in the hat-making trade at the time. Long-term use of mercury products often resulted in mercury poisoning-induced erethism among hat-makers. This is sometimes claimed to be the origin of the phrase "mad as a hatter".

Notable hatters and milliners

This is a partial list of people who have had a significant influence on hat-making and millinery.

Hatters

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