[Jewelry making - Article 00457] - [Orchid] Air filter / respirator tip

[Nugget]

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    I just came across an interesting tip: 

    How do you know if the cartridge in the respirator is good? 

    Keep a bottle of vanilla or banana extract in the shop. Each time
    you put on the respirator, hold the open bottle close to the air
    intake and sniff. If you can smell the extract, replace the
    cartridge. 

    found at    eastwoodco.com

 

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