PubMed · 10267639
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G Hodge. 1984. Using pen and ink.. https://pubmed.ncbi.nlm.nih.gov/10267639/
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Extracts of typewriter ribbons and carbon papers were found to be mutagenic in the Salmonella/microsome assay with strain TA98. Fractionation of ribbon extracts indicates that at least 2-3 different classes of mutagenic component are present in these extracts. Nitro-containing compounds may be responsible for the high mutagenicity observed for some of the ribbon extracts in the absence of S9. The results indicate that impurities in the products may be causing part of the mutagenic effect.
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