Discolouration becomes a quality. The objective is to produce a wallpaper that changes colour and/or composition over time through the influence of sunlight. CANON supports this project by rENs with knowledge and materials.
Colourfastness is considered a quality, but discolouration can never be prevented entirely. The dye inks in home printers and the pigmented inks on the professional market have different characteristics and, therefore, a different colourfastness. rENs experiments with a combination of various types of ink and paper, in order to control discolouration with the help of UV radiation.