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ColorFast Photo Paper from HP

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Category: Darkroom Printing

ColorFast Photo Paper from HP -

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HP Colorfast Photo Paper is a high-quality photo paper with the same weight and finish as a traditional photograph and has been designed for photo enthusiasts who want to display their inkjet photos for extended periods of time. To ensure confidence in HP's claims, the paper was tested by two independent laboratories, - Wilhelm Imaging Research and the Image Performance Institute of the Rochester Institute of Technology.

Results were achieved by using accelerated fluorescent lightfastness testing when using HP Colorfast Photo Paper with the HP No. 78 tri-color inkjet print cartridge. The Image Performance Institute of the Rochester Institute of Technology found HP Colorfast Photo Paper to resist noticeable fading for up to 26 years under glass, and up to 17 years without glass. While Wilhelm Imaging Research found the paper resists noticeable fading for up to 17 years under glass.

'Fading has been an issue for digital photography enthusiasts for many years. Now, with this new lightfast inkjet photo paper from HP, we will see a huge leap forward in the permanence of digital photography and inkjet photo printing,' said Rhiannon Williams, HP Supplies product manager, UK. 'HP Colorfast Photo Paper offers substantial longevity as well as the flexibility and convenience of digital photography.'

It is the interaction between the paper coatings and components and the ink used that gives the paper its colorfastness. Optimal fade resistance is achieved by using HP Colorfast Photo Paper and the HP No 78 tri-color inkjet print cartridge with the following HP printers:

HP DeskJet 700 through to 900 series
HP DeskJet 1220
HP PhotoSmart
HP OfficeJet Pro, R, T, G, K and 6000 series
HP PSC 500 All-in-One

A pack of 20 A4 sheets costs under 17

Information about HP and its products can be found on the World Wide Web at http://www.hp.com.

Background research on image permanence using HP's ColorFast inkjet printing paper.
Media can have a profound effect on the quality of the printed image including:

  • colour saturation
  • density range
  • smoothness and uniformity of tone
  •  brightness
  •  surface texture
  •  ink drying properties
  • the subjective 'feel' of the print

The components and coatings that are used to make up ColourfFast paper have a significant impact on its lightfastness when combined with specific inks. These ink and media combinations exhibit major differences in:

  • humidity-fastness
  • water resistance
  • susceptibility to ozone and other airborne contaminants that can cause image degradation

Lightfast claims are only valid on specific paper and ink combinations.

When subjecting the same combination of paper and ink to a set level of light exposure delivered over differing lengths of time, similar levels of fading are recorded. When different levels of fading are recorded this is called reciprocity failure - a pertinent measure of lightfastness.

When paper is exposed to the same level of light energy but at different intensities over different lengths of time and the results differ, reciprocity failure is recorded. Reciprocity failure is not detected when the reaction of the paper is the same, regardless of being exposed to low-intensity light for a long duration or to high-intensity light for a short duration. HP believes that accelerated light-fade tests such as these are more reliable than predictions made for photo papers and inks that demonstrate reciprocity failure.

How the tests were done
Independent testing was conducted by Wilhelm Imaging Research and Image Performance Institute at Rochester Institute of Technology.

Image Performance Institute
* 50 kilolux unfiltered cool white fluorescent light using the DeskJet 970Cxi + HP ColorFast Paper.
* Tested both with and without glass.
* Data analysed in accordance with ANSI Standard IT9.9 and ISO Standard 10977.
* Predictions made on the assumption that image fading followed reciprocity law.
* Results showed the predicted display life of HP ColorFast Photo Paper to be 26 years with glass and 17 years without glass.

Wilhelm Research Testing
* 30 kilolux glass-filtered accelerated florescent light fading tests using the HP DeskJet 970C and HP Colourfast paper.
* Tested with glass.
* Data analysis based on the ANSI standard.
* Predictions made on the assumption that image fading followed reciprocity law.
* Results showed the predicted display life of HP Colorfast Photo Paper to be 17 years with glass.

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