# Factice

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**Factice** is [vulcanized](/source/Vulcanized) unsaturated vegetable or animal oil, used as a processing aid and property modifier in [rubber](/source/Rubber).

Longer chain [fatty-acid](/source/Fatty-acid) containing oils such as [rapeseed](/source/Rapeseed_oil) or [meadowfoam](/source/Meadowfoam_seed_oil) produce a harder, more desirable factice. [Soybean](/source/Soybean_oil) oil produces lower quality factice, though it can be mixed with longer-chain oils to yield factice nearly as good as that made from long chain oils alone.[1] Oil-resistant factice is made with [castor oil](/source/Castor_oil).[2]

[Cross-linking](/source/Cross-link) the fatty-acid chains with [sulfur](/source/Sulfur) (brown factice) or [disulfur dichloride](/source/Disulfur_dichloride) (white factice) yields a rubbery material that improves the processing characteristics and ozone resistance of rubber.[1] Varying the amount of factice changes the physical properties of the rubber; molded items might be 5–10% factice, extrusions 15–30%. Rubber erasers can have as much as 4 times as much factice as rubber in their composition.[2]

## References

1. ^ [***a***](#cite_ref-Erhan_1-0) [***b***](#cite_ref-Erhan_1-1) Erhan, Selim M.; Kleiman, Robert (March 1973). ["Factice from oil mixtures"](https://web.archive.org/web/20130412220011/http://naldc.nal.usda.gov/download/24579/PDF). *Journal of the American Oil Chemists' Society*. **70** (3): 309–311. [doi](/source/Doi_(identifier)):[10.1007/bf02545313](https://doi.org/10.1007%2Fbf02545313). [S2CID](/source/S2CID_(identifier)) [95493744](https://api.semanticscholar.org/CorpusID:95493744). Archived from [the original](https://naldc.nal.usda.gov/download/24579/PDF) on April 12, 2013. Retrieved March 16, 2012.

1. ^ [***a***](#cite_ref-Simpson_2-0) [***b***](#cite_ref-Simpson_2-1) Simpson, Richard B., ed. (2002). [*Rubber Basics*](https://archive.org/details/rubberbasics00simp). Rapra Technology Ltd. pp. [133](https://archive.org/details/rubberbasics00simp/page/n140). [ISBN](/source/ISBN_(identifier)) [1-85957-307-X](https://en.wikipedia.org/wiki/Special:BookSources/1-85957-307-X).

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Adapted from the Wikipedia article [Factice](https://en.wikipedia.org/wiki/Factice) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Factice?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.