Spectral photometer

Spectral photometers (or spectrophotometers) are high-quality colorimeters that can measure and accurately describe any colour.
The measuring instrument achieves this by illuminating the measuring surface with the entire spectrum of the visible light. The remission values of certain wavelengths together give the measured value, often this is output in Lab (measuring mode freely selectable from M0 to M2). The spectral measurements can also be stored directly.

High-quality proof printers have their own spectrophotometers to verify the print directly.

Spectrophotometer

Spectrophotometers are high-quality colorimeters that can measure and accurately describe any colour.
The measuring instrument achieves this by illuminating the measuring surface with the entire spectrum of the visible light. The remission values of certain wavelengths together give the measured value, often this is output in Lab (measuring mode freely selectable from M0 to M2). The spectral measurements can also be stored directly.

High-quality proof printers have their own spectrophotometers to verify the print directly.

Spot Colour

Spot colours are inks that do not belong to the CMYK colour space, but are printed as a real colour in an additional inking. The most important representatives are PANTONE, HKS and TOYO colours.

As a bright CMYK Red is produced by overprinting 100% Magenta and 100% Yellow inks, a spot colour, such as PANTONE Warm Red, is printed as a real colour in its own inking unit, and therefore can achieve a higher colour gamut than the mixed CMYK colours. Luminous colours like Pantone 811 or metallic colours like silver and gold can only be reproduced by spot colours.

The disadvantage of spot colours lies in the higher costs. A booklet with a PANTONE spot colour and colourful images has to be printed using 5 colours: CMYK plus PANTONE red. This requires 5 printing plates and a printing machine with 5 colour stations. The advantage of higher colour space is so often contrary to the disadvantage of the higher cost.

Spot colours can be reproduced very well in modern proofing systems. The colour variations of the proofs of Proof.de are published here and mostly reflect the PANTONE and HKS Colours to be well within the achievable Proof.de Gamut.

Colour variations of Pantone colours in the proof in Delta-E

Colour variations of Pantone metallics colours in the proof in Delta-E

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