Working with an ink company to reuse the solids is a good idea, but I
would caution you and the ink company about waste regulations. The
issue may be that the ink company would be considered a Treatment,
Storage, and Disposal Facility (TSDF) if they accept a waste material.
The regulations are different from state to state depending on their
definition of recycling and how they enforce the regulations.
Obviously, TSDF permitting is not a recommended option. It is a very
costly and time consuming process. An alternative is to fuel blend the
solids rather than send them to a land fill. Although ink pigments from
w.b. ink have no BTU value they can combine them with other materials
and fuel blend them at places such as a cement kiln.