Specifications include, but are not limited to: The Contractor shall use White Wove, 24#, bright white paper for all Business and Booklet Style Envelopes and White Wove 28#, bright white paper for all Catalog Style Envelopes purchased under the resulting contract. The Contractor may use either Virgin Paper or Recycled Paper for providing Envelopes under a resultant contract. Paper stock utilized must meet or exceed the U.S. Postal Service regulations for automated mailings. In accordance with Arkansas Code Annotated § 19-11-102, the Contractor shall use soybean oil ink to print Envelopes under a resulting contract, provided that the soybean ink is comparable in price to other inks and is equally suitable for use. On the Official Solicitation Price Sheet, the Prospective Contractor shall indicate the paper stock brand and ink brand being bid. The Prospective Contractor’s shall intend to utilize the ink and paper stock brand indicated on the Official Solicitation Price Sheet when fulfilling its obligations under the resultant contract. Substitutions made to the paper stock brand and ink brand (including soybean oil ink) to be utilized under a resulting contract as provided on the Prospective Contractor's Official Solicitation Price Sheet, or as otherwise provided under a previously approved substitution request occurring after award, must be approved in writing by OSP prior to production.