What is PD ISO/TS 18621‑11 – Colour gamut analysis about ? 
PD ISO/TS 18621‑11 defines procedures to measure and compare the colour gamuts of RGB and CMYK printing processes.
PD ISO/TS 18621‑11 is not applicable to other printing processes. 
PD ISO/TS 18621‑11 specifies the procedure for describing the colour gamut of a reproduction system based on its ICC profile.
Who is PD ISO/TS 18621‑11 – Colour gamut analysis for ?
PD ISO/TS 18621‑11 on colour gamut analysis is useful for: 
- Photographers and videographers
- Computer graphics professional
- Quality testing laboratories
- Printing production personnel 
Why should you use PD ISO/TS 18621‑11 – Colour gamut analysis ?
The colour gamut that can be achieved by a reproduction system is an important attribute. It enables users to compare the colour reproduction capabilities of different printing systems and to determine whether one system can simulate all the colours available in another. PD ISO/TS 18621‑11 describes procedures to define and compare colour gamuts. 
PD ISO/TS 18621‑11 provides a set of well-spaced coordinates in device space and an associated triangulation for the determination of the set of faces.
For processes with more than four colour components, some knowledge of the colourimetry of a sample of colours from the colour data encoding is needed in order to determine which colours lie on the boundary.
For these reasons, coordinates on the surface of the gamut of RGB and CMYK printing processes can be determined by printing a test chart with suitable colourant combinations, and measuring the colours while for other printing processes, it is necessary to model the colourant-to-colourimetry relationship in order to identify colours on the gamut boundary. Hence it is important to perform colour gamut analysis as specified in PD ISO/TS 18621‑11.
