Large format prints can be used for a range of purposes including posters, signs and photographic artwork. And while using
large format printers like Canon's imagePROGRAF series and compatible paper ensures high quality results, more can be done to maximise the permanence of these prints.
There are 3 main reasons why increasing print permanence is important in large format prints:
-
Mixed gases. Because large format prints have many uses and are found in various environments, they are exposed to a host of mixed gases. These gases can include those from cigarette smoke, cooking fumes, insect residues and other airborne contaminants.
According to independent image researchers, Wilhelm Research, prolonged exposure to mixed gases will reduce print permanence. For example, a Black-and-White print made from Canon's imagePROGRAF large format printers will last over 100 years in an unprotected resistance to Ozone test before fading and discolouration begins. However, under a glass frame, print permanence will double to more than 200 years!
-
Illumination. Extended exposure to sunlight or fluorescent lighting (for example, in museums or art galleries), will increase the rate of fading. According to research, a bare-bulb incandescent light contains significant UV emissions at 313nm and 365nm which can greatly affect the light-fastness of some print materials.
In an accelerated bare-bulb lighting test, unprotected prints from Canon's imagePROGRAF
large format printers could last more than 150 years before any signs of yellowing or fading took place. But when framed in UV-filtered glass, print permanence rose to 300 years
-
Humidity. Keeping a large format print in a dark cool place can lead to deterioration and a yellowing of the paper. Humidity and high temperatures are major causes of this effect and can chemically alter the inks printed on the paper. While Canon imagePROGRAF prints were found to have high resistance to humidity, with proper storage practices, print life can increase to an incredible 300 years!
