Ink Press

Inkpress Inkjet Papers Print Permanence Ratings

Wilhelm Imaging Research (WIR)( is currently testing a wide range of Inkpress Inkjet Papers for print permanence ratings. Long considered the standard by which all inkjet papers are measured, WIR tests papers with Canon, Epson, and HP printers to determine the stability of the media. With papers that have been measured, such as Inkpress Rag Warm Tone 200 and 300, the results are over 110 years for each of the printers with Epson printers using UltraChrome ink, and over 200 years for HP Vivera ink.

Fpr more info on Wilhelm testing results please go here:

Although not tested yet by WIR, Sihl, the manufacturer of Inkpress Pro Gloss and Pro Silky, have subjected this media to the same type of tests as those performed by WIR. This criteria uses the following display conditions:

v     A: Indoor low intensity indirect daylight: 200 Lux, 10 hours/day

v     B: Indoor medium intensity indirect daylight: 500 Lux, 10 hours/day

v     C: Indoor high intensity indirect daylight: 2,000 Lux, 10 hours/day

v     D: Direct sunlight, south facing window: 10,000 Lux, 4 hours/day

For each of these conditions, prints are mounted framed under glass. Failure is identified by visible fading of the inks, and/or color imbalance or color balance shifting.

Printers used for this testing are the Canon imagePROGRAF 6100 with genuine Lucia pigmented inks, the Epson 7800 with genuine UltraChrome K3 inks, the Epson 7880 with genuine UltraChrome K3 Vivid Magenta inks, and the HP Z3100 with genuine Vivera inks.


Display Condition


Indoor low intensity indirect daylight


Indoor medium intensity indirect daylight


Indoor high intensity indirect daylight


Direct Sunlight at window






Canon 6100 with Lucia pigment ink





Epson 7800 with UltraChrome K3 ink





Epson 7880 with UltraChrome K3 Vivid Magenta ink





HP Z3100 with Vivera ink*

> 125

> 63

> 31


*Note: For HP inks, the failure criteria have not been reached within the exposure time. In this test, fading is assumed to be caused mainly by UV-light from reflected sunlight in private indoor environments. Fluorescent light may give different results due to different spectra and intensity of UV light. This may be important for indoor office display conditions, museum displays, etc. where artificial fluorescent light sources are used as well as comparing data to different test conditions


The listed printers are used for accelerated permanence testing with genuine OEM inks. Please not that these ratings are made to the best of our knowledge and by extrapolation of accelerated tests. For storage under extreme conditions and for improper use of prints, the prediction of durability is not possible. These figures should be used as a estimation. In addition to fading of the printed areas (inks), a slight discoloring of the background due to the use of optical brighteners in the paper is observed with is not rated critical to user acceptance regarding photographic prints.

Image failure is classified as a 30% optical density loss of single colors or a 15% optical density deviation between single colors.

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