Titanium Dioxide/- Lithopone/- Fina Process Oil 2059/100.0 White Factice 822/400.0 Zinc Oxide/10.0 Vulcanizate Properties: Cure: 30 min at 150 C in stea Density (mg/m^3)/1.59 Hardness, IRHD/49 Stearic Acid/2.0 Barytes/- Mill mixing is often preferred because of the greater control it allows. High factice levels can also cause occasional crumbling in internal Sulfur/7.0 mixers unless care is taken. Mill rolls should be kept cool since high MBTS/1.5 temperature may result in sticking. The following mix schedule has been found satisfactory: DPG/2.5 Disperse the zinc oxide in the rubber. Add stearic acid, accelerators, sulfur, pigment, filler, and oil. Add the factice. Pigment/as required Erasers are generally either cured from calendered or milled sheet in simple clamped molds in a steam pan or are extruded and then steam cured. Press molding is also used. Molded erasers may be either individu
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