When producing their claymation-style feature films or Wallace and Gromit & Shaun the Sheep animations, Aardman Animations goes through 100s of pounds of modeling clay. As Adam Savage learned on a recent visit to Aardman, bulk clay from the factory is run through several processes to ensure that Gromit's fur is the same shade in frame #6800 as it was in frame #1 and that the consistency is appropriate for the modelers.
See also the mesmerizing paint mixing videos on Instagram and YouTube.