Water-borne ink is the most environmentally printing ink at present in food packaging industries, which is one and only type ink that has been recommended and approved by FDA. This type of ink can be used for food packaging and directly contacted with food. 水性凹版油墨是当今最为环保的印刷油墨之一,也是目前唯一被美国FDA推荐和认可的,可以用于与食品直接接触的印刷油墨。