Lead and Chromium in paints of pencils
Pertanika Journal of Tropical Agricultural Science, Volume 6, Issue 2, August 1983
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29 brands of pencils and 5 sets of coloured pencils were analyzed for lead and chromium content. Tests showed that high levels of lead (> 1000 ppm) and chromium (> 100 ppm) could be extracted using dilute hydrochloric acid (0AM) at body temperature for two brands of pencils from Japan.
ISSN 1511-3701
e-ISSN 2231-8542