September 2005, V4#9: Production Thursday, Jan 29 2009 

A Little About Archival Quality

Internal Factors

The Gregath Publishing Company has a standard paper basis that all quotations and projects are based on unless the customer requests something different.  Our standard fine text paper is a 20/50#, uncoated, white, acid free paper.  This paper meets American National Standards Institute specifications for “Permanence of Paper”.  The paper is manufactured with chemical pulp under alkaline conditions.  Being of a very high benchmark (various ANSI and National Information Standards Organization standards), this paper meets these four basic requirements:

  • pH of 7.5-10 (balanced to archival)

  • A tear resistance of md index>5.25mNm2/6g which corresponds to a minimum of 40 gf.

  • Alkaline reserve: minimum of 2% calcium carbonate equivalent (buffered)

  • Less than 1% lignin (acidic)

This paper also earns “high” to “maximum” life expectancy for “Copies for Office Copying Machines” as established by ASTM International (formerly American Society for Testing and Materials).  This typically applies to xerocopy and digital grades.  While we have yet to find a published expected life span for permanent papers, ASTM suggests in their specification that paper meeting the high classification of this standard may be “usable” for 100 to 1,000 years.  Please note that the ASTM suggestion of usable means it can still be reproduced upon.  A reader can enjoy books printed on paper that is way past this “usable” stage of it’s life.

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August 2005, V4#8: Production Thursday, Jan 29 2009 

A Little About Archival Quality

Acid free, permanent and archival can be defined many ways.  However, it should be noted that both internal and external factors affect the finished product at any given time.  Internal factors are those that go into the making of the raw materials. External factors are everything from the atmospheric conditions during publishing (a book produced in a large industrial park may be subjected to caustic factors), heat, humidity and UV light to a book owner’s habit of using hand lotion frequently.

March 2005, V4#3: Define Wednesday, Jan 28 2009 

Acid Free Books: The use of this term varies from the logical definition of the individual words to a wide variety of standards – always have a company explain their definition.  An acid free book depend on internal (book materials) and external factors (chemical processes, environment, etc.).  Because of varying factors, we do not use this term, see archival webpage for more information.

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For other writing, printing, publishing, marketing lingo, check our glossaries at http://www.gregathcompany.com/gloss.html and
http://www.gregathcompany.com/glosswrite.html