Talk:Kneaded eraser

Composition
What is a kneaded eraser made out of? Certainly someone must know its general composition. "It is usually made of a grey or white pliable material..." doesn't seem like it clears the bar in my book. Matatigre36 (talk) 16:09, 13 April 2016 (UTC)
 * According to this source: "natural and synthetic rubbers, vulcanized vegetable oil, antioxidants, mineral oil, pumice, calcium carbonate, titanium dioxide, and carbon black." "CCI reports its composition to be poly (isobutene), calcium carbonate, titanium, chloride, sulphur and trace amounts of magnesium, aluminum, silica, and potassium." This source (from the same journal) says: " Like the Pink Pearl eraser, the Faber-Castell Kneadable eraser is said to contain factice, rubber, antioxidants, pumice, and colorants. Unlike the Pink Pearl, it is said to contain mineral oil as a softener to prevent curing, and CaCO3 as a filler." Personally I'd go with the first definition, though the composition seems to vary by manufacturer. Opencooper (talk) 17:59, 13 April 2016 (UTC)

History
What is the history of the kneaded eraser? Who invented it and when? — Preceding unsigned comment added by 2003:72:2F13:E00:C4C6:1FD:1CA1:675F (talk) 21:07, 17 May 2018 (UTC)

To clean or not to clean
The article states that “Besides their precision, kneaded erasers are preferred by artists for their long life and ease of cleaning”, followed by “Kneaded erasers cannot be cleaned” which is contradictory. C0ldc0ne (talk) 12:05, 25 May 2024 (UTC)