Each negative is created in order to produce a plate. The plate goes on the printing press and makes contact with the ink and allows the envelope to be printed.
All the envelopes opposite are printed using offset printing after the envelope is made. Printing on envelopes during manufacturing is done using a flexographic (flexo) printing technique. This is most suitable for simple and uncomplicated prints, and is very economical for very large quantities.
Only one colour is used to reproduce the logo and text.
Two distinct spot colours, blue (pms 293) and grey (pms430), are used to reproduce the logo and text.
Three (3) different colours are used here even though the print has four different colours. The lighter shade of green is a stiple of the dark green below it.
Like the 1, 2 and 3 colour printing examples above, this 5 spot colour job was printed using 5 different PMS colours. A similar result is achievable using 4 colour process, although each different colour in the logo would be made up of a combination of fine dots (black, cyan, magenta and yellow) rather that the solid ink coverage which the spot colour printing technique produces.