We found 4 dictionaries that define the word printing inks:

General (3 matching dictionaries)

1. printing inks: Merriam-Webster
2. printing inks: Collins English Dictionary
3. printing inks: Vocabulary.com

Tech (1 matching dictionary)

4. Book Binding (No longer online)

(Note: See printing_ink as well.)

Definitions from Wiktionary (printing ink) ▸ noun:  A rapidly drying type of ink specifically for printing machines. ▸ Also see printing_ink ▸ Words similar to printing inks ▸ Usage examples for printing inks ▸ Idioms related to printing inks ▸ Wikipedia articles (New!) ▸ Words that often appear near printing inks ▸ Rhymes of printing inks ▸ Invented words related to printing inks