177.2710 Styrene-divinylbenzene resins, cross-
Styrene-divinylbenzene cross-
(a The resins are produced by the copolymerization of styrene with divinylbenzene.
(b The resins meet the extractives limitations prescribed in this paragraph:
? 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.
? 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 withgood manufacturing practice, finished articles containing the resins shall be thoroughly cleansed prior to their first use in contact with food.