Design Kneaded Rubber
[Prismacolor formerly Sanford Corp formerly Faber-Castell] A registered trademark for a soft, rubbery eraser. Kneaded (formerly Kneadable) Rubber erasers are composed of poly(isobutene) rubber mixed with vulcanized vegetable oil, antioxidants, mineral oil, pumice, calcium carbonate, titanium dioxide, and carbon black. Kneaded Rubber erasers leave copious small white or transparent crumbs that are invisible to the eye (Estabrook, 1989). Surface pH measurement of the Kneaded Rubber erasers gave a neutral pH value of 7.86 (Estabrook, 1989).
Synonyms and Related Terms
Design Kneadable rubber eraser; Kneaded rubber eraser
Hazards and Safety
Residual sulfur and/or chloride may be present from oil vulcanization.
Resources and Citations
- E.Estabrook "Considerations of the Effect of Erasers on Cotton Fabric" JAIC 28:79-96, 1989. Link
- E. J. Pearlstein, D. Cabelli, A. King, & N. Indictor :Effects of Eraser Treatment on Paper" JAIC 22(1):1-12, 1982. Link