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Reversible airways obstruction occurred in a photographer after long-term exposure (over many years) to sulfuric and acetic acid fixers. Air-exchange recommendations for darkrooms by the Building Officials Code Administration [1981] differ markedly from those recommended by the American Society of Heating, Refrigerating, and Airconditioning Engineers [1977] and the fixer manufacturer (Eastman Kodak). Use of fume hoods or rates of air-exchange higher than are required by law may be necessary to prevent symptoms and disease in certain workers.
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