Printech Archives, August 1997: Re: Reuse of Dewatered Ink Solids

Re: Reuse of Dewatered Ink Solids

Debra Kramer (
Thu, 7 Aug 1997 09:53:08 -0500


To add to George's response:

George is right that the solvent portion of a w.b. ink has btu value and
that the majority of solvent and additives is washed out by the time you
get to the point of dealing with the pigments themselves. The issue you
run into when disposing of wb ink waste is that the pigment (or solid
portion) typically does not have BTU value.

A TSD can flocculate the waste water to drop the solids out. The solids
are pressed through a filter press and then blended with other materials
which *do* have BTU value. Typically they are sent to a cement kiln.

Obviously another option is to try blending those filtered solids into
black ink. The key thing here is that the *printing company* would need
to find a re-blender or recycler who will take these solids or they must
manufacture their own ink on site (very few mfr ink from pigment and
resin on site).

The majority of the ink companies will NOT take ink, cans/containers,
etc. back due to waste disposal regulations. There is too much risk of
being sited and considered a TSD and then have to permit the ink
manufacturing facility as such.

Deb Kramer

From: Frantz, George
Sent: Monday, August 04, 1997 8:45 AM

Dave... to the best of my knowledge, some pigment will have BTU, and the

solvent portion of the waterbase ink (flexo or gravure) will have BTU
value, but they're more than washed out because of the 80-90% water content of
the inks.



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