Why is an organic vapor respirator cartridge required when spraying finishes, and when should cartridges be replaced?

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When spraying finishes, solvent vapors in the air pose the main inhalation hazard, so an organic vapor respirator cartridge is used to adsorb those vapors and protect your lungs. These cartridges are designed specifically for volatile solvents found in paints and finishes, not for filtering dust or preventing eye splashes. They have a limited service life, so replace them according to the manufacturer’s guidance or sooner if you notice increased breathing resistance or a noticeable odor, which can indicate breakthrough and reduced protection. Daily replacement or eye protection purposes aren’t the function of these cartridges.