Colour Physics

Kubelka-Munk K/S Colour Formulation Predictor

Reflectance does not add up; K/S does. That single change of variable is what turns colour matching from guesswork into arithmetic.

Measured Sample At the peak wavelength
%
%
% owf
Target Standard
%

Sample K/S

—

Kubelka-Munk function of the measured reflectance

Formulation

Substrate K/S
—
Unit K/S per % owf
—
Target K/S
—
Concentration for Target
— % owf
Concentration Factor
— ×

Single-constant Kubelka-Munk on one wavelength. A real match is solved across the whole spectrum and needs the two-constant form for mixtures with white pigment; treat this as the single-dye build-up, not a full recipe engine.

Kubelka-Munk K/S Colour Formulation Predictor — free, with the formula and a worked example, at Textile School.