Eyewear, Lenses & Vision Products worked example

Tint Bath Capacity at 66% tint bath availability: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop tint bath availability to 66%, then walk the calculation through step by step. Estimate usable tinted-lens capacity from bath load size, available tint cycles, bath availability, and first-pass tint acceptance.

The inputs for this scenario

  • Lenses per tint bath cycle: 32 lenses / cycle (held at the documented default)
  • Available tint bath cycles: 18 cycles (held at the documented default)
  • Tint bath availability: 66 % (the input this scenario stresses; the baseline uses 92)
  • First-pass tint acceptance: 95 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross tint capacity = lenses per tint bath cycle × available tint bath cycles.
  • Usable first-pass tinted lenses works out to 361 lenses at these inputs, and this is the headline figure for the scenario.
  • Gross tint bath capacity works out to 576 lenses at these inputs.
  • Tint capacity lost to bath downtime or changeover works out to 196 lenses at these inputs.
  • Tint capacity lost to color or cosmetic rejection works out to 19.01 lenses at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where tint bath availability sits at 92% and the headline result is 503 lenses, this scenario comes in 28.26% below the baseline at 361 lenses.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to tint bath availability, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It assumes a stable, well-maintained dye bath; aged or contaminated dye, frequent color changes and difficult substrates (polycarbonate, high-index) push real acceptance below your entered figure.

Results at a glance

  • Usable first-pass tinted lenses: 361 lenses (headline result)
  • Gross tint bath capacity: 576 lenses
  • Tint capacity lost to bath downtime or changeover: 196 lenses
  • Tint capacity lost to color or cosmetic rejection: 19.01 lenses

Run it with your numbers

  • To rerun this with your own numbers, open the live Tint Bath Capacity calculator, set tint bath availability to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.