§177.2710 Styrene-pinylbenzene resins, cross-
Styrene-pinylbenzene cross-
（a） The resins are produced by the copolymerization of styrene with pinylbenzene.
（b） The resins meet the extractives limitations prescribed in this paragraph:
（1） The resins to be tested are ground or cut into small particles that will pass through a U.S. standard sieve No. 3 and that will be held on a U.S. standard sieve No. 20.
（2） A 100-gram sample of the resins, when extracted with 100 milliliters of ethyl acetate at reflux temperature for 1 hour, yields total extractives not to exceed 1 percent by weight of the resins.
（c） In accordance with good manufacturing practice, finished articles containing the resins shall be thoroughly cleansed prior to their first use in contact with food.
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