Coatings, Inks & Specialty Chemical Production worked example

Solvent Usage with solvent addition or wash-down rate of 9 gal / hr: a worked example in coatings, inks & specialty chemical production

Suppose solvent addition or wash-down rate falls to 9 gal / hr. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate solvent consumption and cost from solvent use rate, process time, and solvent unit cost.

The inputs for this scenario

  • Solvent addition or wash-down rate: 9 gal / hr (the input this scenario stresses; the baseline uses 18)
  • Letdown or cleanout time: 2.25 hr (held at the documented default)
  • Solvent cost per gallon: 11.4 $ / gal (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Solvent Usage consumed = solvent use or addition rate × solvent addition or cleanout time.
  • solvent usage consumed works out to 20.25 gal at these inputs, and this is the headline figure for the scenario.
  • solvent usage cost works out to 231 $ at these inputs.
  • solvent addition or cleanout time works out to 2.25 hr at these inputs.
  • solvent cost per gallon works out to 11.4 $ / unit at these inputs.

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 50% below the baseline at 20.25 gal.
  • It computes solvent gallons consumed as addition or wash-down rate times time, then multiplies by solvent cost per gallon for total solvent spend. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • solvent usage consumed: 20.25 gal (headline result)
  • solvent usage cost: 231 $
  • solvent addition or cleanout time: 2.25 hr
  • solvent cost per gallon: 11.4 $ / unit

Run it with your numbers

  • To rerun this with your own numbers, open the live Solvent Usage calculator, set solvent addition or wash-down rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.