Downloadable computer software for calibration of colour measuring instruments and of instruments measuring the visual appearance of materials, particularly of spectrophotometers; downloadable computer software for ensuring the accuracy of colour measuring instruments and of instruments measuring the visual appearance of materials.

Disc recorded computer program for ensuring color accuracy of a computer output or input device, namely, a monitor, printer, CRT scanner, digital camera, video camera, spectrophotometer, colorimeter, or spectrometer