Felt

Do you know where the “Mad Hatter” got his name? Here’s a clue – vintage felt hat: 3,844 ppm MERCURY! [100 is unsafe]

Do you know where the “Mad Hatter” got his name? Here’s a clue – vintage felt hat: 3,844 ppm MERCURY! [100 is unsafe]

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I have long known the vintage and antique felt hats were (historically) made with unsafe levels of Mercury (as part of the felting process for the wool as I understand it), but I had never personally tested a vintage felt hat and found it to be positive for high levels of Mercury — until now….