The focus of the animation is the CMYK model which is a mathematical abstraction and not the device dependency of any particular print process I consider it helpful in the same way as the animations at the articles RGB color space and YCbCr are in explaining a 3 D volume that can be difficult to visualize from a static drawing We can not show subtractive ink colors accurately but that does not mean the article can not have diagrams The colors I used are the same as here and here i e 125 colors uniformly filling the displayable range and mapped to the CMK space Note this is not perfect there is no gamma correction and linearity is assumed If anyone likes to propose a different colour law in terms of 24 bit RGB shades I can see about putting them in the animation Just noticing that it is a spinning object tells the viewer it is something in 3 D It helps to notice that the cube rotates about its diagonal which is the K axis Then one understands the geometry The goal is to give a qualitative visualization of how ink densities are coordinated like dimensions of a space a In principle three inks can define the whole gamut which is therefore a cube The article explains that black ink is added to save money on ink and to address the inadequacy of affordable CMK inks in very dark tones I think it is a forlorn expectation that any Wikipedia diagram can provide colorimetrically accurate color swatches It is correct to show that the CMK trio of subtractive inks work to a good first approximation as orthogonal variables that define a color space jacobolus has ideas for further geometric diagrams of the printing process that should be helpful if they are based on reliable sources May we hear more