And if no inks are used, white paper remains white, not black.
So, for printing onto paper, the CMYK printing process is used. Mix two of these together and you can make red, green or blue. However, because inks are not perfect, the black appears as more of a dark brown colour, so a pure black ink is used to overcome this.
Although a greater number of ink colours should give better quality results, in reality, the differences are subtle – in many cases you will find it difficult to detect the difference between a six-ink print and an eight-ink print.
Bubble jet printers do not provide a protective coating.
The sensor in your digital camera is made up of millions of tiny picture elements (pixels).