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By using Canon's "Photo Paper Pro" with Canon's genuine ink, you can achieve an image permanence of up to 100 years1 (when stored in an album).
1. Image permanence of up to 100 years (when stored in an album)
To test the image permanence when prints are stored in an album, we use the same method as how the image permanence of silver-halide photo papers are measured when stored in dark places.
Print samples are printed with ink concentration of 1.0 (each Bk, C, M, Y). The samples are kept in a certain environment of high temperature and 50% humidity. The rate of the decrease in ink concentration and rate of yellow discolouration are recorded. The recorded results are then converted to the length of time when print image is kept in an environment of 23%/50% humidity.
Judgement standards
Limit point for single colour composite colours: The percentage in decrease of illumination intensity of reflex OD value must be within 30% (OD = 1.0 -> 0.7).
Limit point for process BK: The percentage change of deterioration for each single colour must be within 15% and the reflex OD value (1.0) must be within the limit point (OD 1.0 -> 0.7).
The equation below is used to estimate the number of years until fading becomes apparent. It is assumed that there will be 500 lux x 10 hours of exposure to light per day.
Equation: Number of years until fading becomes apparent = illumination intensity / (5000 lux hour X 365)
Precautions on storing printed images
The above results may not be achieved depending on how the print images are stored or displayed. The indicated results are obtained by the simulation test carried out by Canon Inc and are not guaranteed by Canon Inc. Please note that these results do not reflect the durability or the discolouration of the paper itself. Allow ink to dry completely after printing and before storage. Store images in albums, clear plastic folders or glass frames to avoid exposure to open air. Never store printed images in locations subject to high temperatures, high humidity or direct sunlight. Store prints at normal room temperature.
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