Bottom-lid two pieces box with four-colour printing on usomano paper. Size: 9x9x9x4 cm
Papers with embossed and/or patterned finish (the Florentine lily card for example)
The four-colour is the reproduction and printing in four-colour of an illustration, obtained by selecting (that is dividing) the original according to the principles of subtractive synthesis in the three primary colours yellow, cyan (blue) and magenta (red).
A reproduction obtained by this process is called "tri-colour".
Generally, however, to the three primary colours is added a fourth colour, black, with the aim to obtain more details and a better contrast of the image; hence the term "four-colour".