Xerox X2 - Manual (Page 34)

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34
Archival Conditions and Specification
Given the myriad of preparation techniques, which include folding, rolling, flat stacking and hanging of single or
multiple prints, only image legibility is considered.
Archival Environment: There are 4 environmental components that affect image permanence, durability, and
therefore legibility: Water content (% relative humidity), elemental content (e.g. salt, NaCl), radiation
(exposure to light), and heat.
Xerox specifies an ambient archival environment of no greater than 70°F, 50% Relative Humidity, and total
darkness. A temperature and/or humidity lower than 70°F/50%RH can afford additional increases in
permanence, durability and Archive stability.
Conditions of Referral: Each time a print is referred, or removed from archive storage, its environment and,
therefore, Archiveability is considered changed. Print referral is restricted to the indoor environment, utilising
typical office (fluorescent) lights. Frequency is described as follows:
1. Low: once a year, or less, and not in excess 4 times per year.
2. Ordinary: more than 4 times per year, and not in excess of 12 times per year.
3. High: more than 12 times per year, and not in excess of 52 times per year.
4. Maximum: more than 52 times per year.
Duration of exposure to a non-archival environment is described as follows:
1. Low: No more than 15 minutes of per referral.
2. Ordinary: 0.25-1.0 hour per referral.
3. High: 1.0- 4.0 hours per referral.
4. Maximum: More than 4.0 hours per referral.
The state of continuous referral exists when a print is seldom or never placed in an archival environment during
its life. Maximum frequency and maximum duration is considered as continuous referral.
Combining a degree of frequency with the matching degree of duration results in a specific number of hours per
year through which the print can be exposed. The hours of exposure dictate the permanence and durability of
an image, and the print life. Varying degrees of frequency and exposure can be combined to yield a general life
expectancy in years.
Applications per Media Type
80g/m 2 Line Art Paper Most economical media - for line art graphics, check plots and proofs.
90g/m 2 Coated Design Paper Medium grade papers designed for GIS /CAD and general display
applications excellent image quality at an economical price.
125g/m 2 Hi White Paper Premium quality, for high quality for 360dpi, photo-realistic graphic
presentation imaging.
125g/m 2 Presentation Paper 720 dpi Premium quality, optimum performance in 720 dpi print mode. Use for
all presentations with sharp detail and maximum colour gamut.
160g/m 2 Presentation Paper Heavyweight, photo-graphic quality presentation paper for high
resolution images.
150 micron White Matt Film Excellent image quality and vivid colour rendition. A true water
resistant media for use as an alternative to paper in “field” projects.