Colour Printing

It is essential to properly define the notion of colour. Matter itself does not have colour, it only has the property of reflecting certain light rays to which the eye is sensitive to a greater or lesser degree. Colour is therefore the visual sensation perceived by the observer of an object under a given lighting.

Different factors are involved in the perception of colour:

•  Light: light is an electromagnetic wave, which can in particular be characterised by its  wavelength and therefore its energy.  It can considerably modify the perception of  colour.

•   Matter: matter has the property of reflecting luminous energy to a greater or lesser extent.

• The eye: the eye plays the role of converting the information it receives and transmitting it to the brain for interpretation.

The human eye is sensitive to electromagnetic radiation with wavelengths between 400 and 700 mm (visible spectrum). Colorimetry is the technical means of expressing a colour in mathematical terms so as to position it within a defined space, calculating the differences between a standard and a sample, determining the acceptable colorimetric tolerances and even making colour formulations.

Frequently asked questions

Yes, the appearance of colours can vary depending on factors like the type of paper stock used. Pantone colours may appear differently on coated, uncoated, or silk stocks due to how the material interacts with the ink. It is important to note that we also see colour differently from each other.
Physical samples on different paper stocks can help visualize how colours will appear. Pantone guides can also assist, but computer screens may not accurately reflect printed colours. Wet proofs, though at an extra cost, provide a precise preview of the final print.
Exact colour matches to printed samples may not always be guaranteed due to variations in printer technologies and calibrations. Ordering a colour proof before mass production is recommended to ensure colours meet expectations.