Why are two dilution trials required?

They provide a local measured response for your formulation. Solvent identity, resin chemistry, temperature, and shear history prevent a universal dose rule.

Can the target lie outside the measured viscosities?

No. Run another trial to bracket the target. The calculator does not extrapolate beyond the entered measurements.

What does dose per original base mean?

A dose of 4 means 4 lb of added diluent per 100 lb of original coating. It is not 4% of the final blend.

Can I add the predicted amount directly to production?

Confirm the prediction in a laboratory trial first. Then follow the qualified batch adjustment procedure, including mixing and viscosity verification.

Coatings, Inks & Specialty Chemical Production calculator

Viscosity Adjustment From Trials Calculator

Interpolate a diluent addition between two matched laboratory trials. Enter both trial doses and viscosities, the bracketed target, and the original batch mass.

What this calculator does

Estimate a diluent addition between two measured dilution trials that bracket your target viscosity.

Formula used

Trial fraction = (lower-dose viscosity − target viscosity) ÷ (lower-dose viscosity − higher-dose viscosity)
Estimated dose = lower dose + trial fraction × (higher dose − lower dose)
Diluent addition = original base mass × estimated dose ÷ 100
Adjusted mass = original base mass + diluent addition
Final added diluent share = diluent addition ÷ adjusted mass × 100

Inputs explained

Lower Trial Diluent Dose: Diluent added per original base mass in the lower-dose trial.
Lower-Dose Trial Viscosity: Measured viscosity using the matched temperature and instrument protocol.
Higher Trial Diluent Dose: Diluent added per original base mass in the higher-dose trial.
Higher-Dose Trial Viscosity: Measured viscosity under identical conditions to the lower-dose trial.
Target Viscosity: Approved target measured using the same viscosity test protocol.
Original Base Batch Mass: Base coating mass before any trial-equivalent diluent addition.

How to use the result

Best suited to laboratory solvent-cut planning, matched coating dilution trial.
The result requires a confirming trial; it is not a universal viscosity mixing law. Targets outside the measured bracket and nondecreasing viscosity trials are rejected.

Current U.S. benchmarks

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

Why are two dilution trials required? They provide a local measured response for your formulation. Solvent identity, resin chemistry, temperature, and shear history prevent a universal dose rule.
Can the target lie outside the measured viscosities? No. Run another trial to bracket the target. The calculator does not extrapolate beyond the entered measurements.
What does dose per original base mean? A dose of 4 means 4 lb of added diluent per 100 lb of original coating. It is not 4% of the final blend.
Can I add the predicted amount directly to production? Confirm the prediction in a laboratory trial first. Then follow the qualified batch adjustment procedure, including mixing and viscosity verification.

Last reviewed 2026-10-01.