Coatings, Inks & Specialty Chemical Production worked example

Solvent Usage with solvent addition or wash-down rate of 45 gal / hr: a worked example in coatings, inks & specialty chemical production

This scenario runs the solvent usage calculation on the strong side: solvent addition or wash-down rate of 45 gal / hr, with every other input held at its documented default. planning solvent pulls, viscosity cuts, cleanouts, or VOC-related cost reviews

The inputs for this scenario

  • Solvent addition or wash-down rate: 45 gal / hr (raised for this scenario; the documented default is 18)
  • Letdown or cleanout time: 2.25 hr (unchanged)
  • Solvent cost per gallon: 11.4 $ / gal (unchanged)

Working through the calculation

  • Applying the documented formula (Solvent Usage consumed = solvent use or addition rate × solvent addition or cleanout time) to the inputs above produces each figure below.
  • At this operating point the engine returns 101 gal for solvent usage consumed, the number this scenario is built around.
  • At this operating point the engine returns 1,154 $ for solvent usage cost.
  • At this operating point the engine returns 2.25 hr for solvent addition or cleanout time.
  • At this operating point the engine returns 11.4 $ / unit for solvent cost per gallon.

How this compares with the baseline

  • Against the tool's baseline example, where solvent addition or wash-down rate sits at 18 gal / hr and the headline result is 40.5 gal, this scenario comes in 150% above the baseline at 101 gal.
  • Use it when costing a letdown, estimating cleanout solvent on a color change, or feeding gallons into VOC and hazardous-waste tracking. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • solvent usage consumed: 101 gal (headline result)
  • solvent usage cost: 1,154 $
  • solvent addition or cleanout time: 2.25 hr
  • solvent cost per gallon: 11.4 $ / unit

Run it with your numbers

  • Every input above is editable in the live Solvent Usage calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.