Abstract: The invention disclosed herein relates to apparatus, systems and associated methods for supplying ink to printing presses. The ink supply systems operate in combination with a printing system and comprise a bulk ink supply system and a supplemental ink supply system. The bulk ink supply system and supplemental ink supply system can jointly, or individually, supply inks of different colors to individual press units of a printing press. The bulk ink supply system includes one or more supply lines leading to the printing press for supplying ink to the printing press in bulk. The supplemental ink supply system includes one or more ink canisters for supplying ink to the printing press. An intermediate ink supply system may be operated in addition to and/or in place of the bulk and/or supplemental ink supply system.