Ill. Admin. Code tit. 44, § 500.1120
Contracts requiring the procurement of offset printing services shall specify the use of soybean oil-based ink or vegetable oil-based ink unless the Procurement Officer determines that another type of ink is required to assure high quality and reasonable pricing of the printed product. This Section does not apply to digital printing services.
(Source: Amended at 42 Ill. Reg. 3193, effective February 16, 2018)