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| Kodak molecular sieves are packet of chemical compounds that act as absorbers of water, hydrogen peroxide and other oxidants. |
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| When your silver master microfilm arrives at Heritage it is put through a rigorous inspection. We check for archive completeness
and evaluate every reel for signs of destructive redox or vinegar syndrome. If we detect either of these problems you will be notified
and we will request you repair your archive. At this time your archive is entered into our database for easy future retrieval. |
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| If your archive is in rusty canisters or has tape inside the canisters (as often unfortunately happens), they will be put into new
archival plastic canisters. All canisters have the recommended number of Kodak molecular sieves placed inside the canister. Kodak
Molecular sieves are packets of sodium oxide in a Tyvek pack. This material absorbs moisture, oxygen, acetic acid, and many other
airborne contaminants. Each canister is dated with the month the molecular sieves were placed. The packets are then replaced at the
recommended interval. The regular use of molecular sieves is cited by ANSI as a procedure to prevent redox blemishes by scavenging
the micro-environment inside the film canisters. |
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| If a canister shows signs of vinegar syndrome we perform an overnight test of the amount of airborne acetic acid being released by your films degradation. If your
film exceeds recommended limits you will be notified and we will request that you immediately duplicate your film onto modern polyester backed silver negative microfilm. |
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| Because of the cost and labor involved, most commercial labs do not use molecular sieves at all. Heritage is the only commercial lab to use Kodak molecular sieves in
every roll of microfilm in our vault, and change them at recommended intervals. Kodak molecular sieves are just one more step in a complete archive management system that
assures your microfilm will survive for many generations to come. |
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