This women used Koremlu to remove superfluous hair. She did not apply it to the scalp.
“Koremlu was presented as a revolutionary breakthrough in eliminating unwanted body hair when it hit the market in the spring of 1930. Within a year, more than 120,000 jars were sold! Its depilatory agent was thallium acetate – a common rodenticide that can cause neuromuscular damage, respiratory problems, blindness, and permanent hairloss. One 26-year-old woman reportedly lost her teeth, eyesight, ability to walk, and her job due to Koremlu.” – FDA
Koremul PSA, 1930. Food and Drug Administration, Public Domain License.