Paint, Resin & Polymer Compounding calculator

Color Match Rework Calculator

Find the added cost of correcting an off-color paint batch. Enter the reworked gallons, issued colorant cost, labor record, retesting costs and spending allowance.

What this calculator does

  • Calculate the incremental cost of an off-color batch correction from colorant issues, labor and retesting, then compare with its allowance.

Formula used

  • Correction labor cost = rework hours × loaded labor rate
  • Rework cost = correction colorants + correction labor + retest and overhead
  • Cost per gallon = rework cost ÷ gallons reworked
  • Allowance headroom = approved allowance − rework cost

Inputs explained

  • Volume Reworked: US gallons in the off-color batch sent for correction.
  • Correction Colorant Cost: Issued correction colorant cost from the rework material record.
  • Rework Labor Hours: Recorded correction labor hours, excluding separately costed laboratory work.
  • Loaded Labor Rate: Payroll rate including labor burden, excluding separately entered overhead.
  • Retest and Overhead Cost: Rework laboratory and allocated overhead costs excluding entered production labor.
  • Approved Rework Allowance: Approved incremental spending allowance for this correction event.

How to use the result

  • Best suited to off-color batch reconciliation, retint allowance review.
  • Input ceilings are computational safeguards, not plant benchmarks. Excludes original manufacturing cost, disposal, lost sales and production opportunity cost. Spending does not demonstrate that the corrected color meets specification.

Current U.S. benchmarks

  • As of Sep 2026, average hourly earnings in U.S. manufacturing are $30.21 (BLS), up 3.4% from a year earlier. Burdened shop rates typically run 1.3 to 1.8 times earnings once benefits and overhead are loaded.
  • The producer price index for plastic resins and materials stands at 280.569 (BLS, Aug 2026), up 6.6% from a year earlier. Quotes priced off last quarter's material cost miss this move.
  • Industrial electricity averages 9.77 cents per kWh across the U.S. (EIA, Jul 2026), up 4.7% from a year earlier. Energy-intensive steps carry this directly into unit cost.
  • The producer price index for industrial chemicals stands at 336.006 (BLS, Aug 2026), up 13.3% from a year earlier. Quotes priced off last quarter's material cost miss this move.
  • The U.S. has 14,543 chemical manufacturing establishments employing about 911,245 workers (Census County Business Patterns, 2023).

Common questions

  • Should I include the original batch cost? No. Enter only the additional cost caused by the color correction. The normal manufacturing cost belongs in the original batch cost sheet.
  • How do I handle several correction attempts? Sum the colorants, labor and retesting for all attempts once. Use the affected batch volume once when reporting the total rework cost per gallon.
  • Does tint addition change the gallon denominator? The denominator is the original batch volume sent for correction. Cost per final released gallon requires the final measured volume and a separate yield reconciliation.
  • Can this tell me whether the color passes? No. Apply your specified color measurement and acceptance procedure after correction. A low rework cost does not establish a matching color.

Last reviewed 2026-10-02.