Molecular Sieve Acid Scavenger

For moisture free film storage and extended dye images

Long-term storage of film has been an industry concern since the beginning of motion pictures. Moisture, temperature, acids and vapors from the atmosphere that surround stored film have an impact on the life expectancy of motion picture film.

"Vinegar Syndrome", is a term used to describe the chemical reaction that goes on during the deterioration of cellulose triacetate film support. When cellulose triacetate begins to decompose, "deacetylation" occurs, and the acetate ion reacts with moisture to form acetic acid producing a vinegar odor when a can is opened. Once the reaction is started, it cannot be stopped.

Molecular Sieve is a technology developed by Eastman Kodak Company, that has the ability to retard the vinegar syndrome reaction. Simply stated, the inclusion of Molecular Sieve with processed motion picture film in a sealed container has the ability to extend the life of the dye images and film support beyond that which is currently considered normal.

When should the KODAK Molecular Sieve be used?

Molecular Sieve can be introduced at any stage of film storage but is most effective when introduced at the earliest opportunity (after lab processing and before storage).

How to use the KODAK Molecular Sieve

Molecular Sieve is held in a semi-permeable packet of Tyvek™ - which allows vapors to be easily scavenged and contained.

The Molecular Sieve packets should be placed evenly around the outside circumference of the film roll. The packets can be folded lengthwise for 16mm applications. Film and Molecular Sieve packets are then inserted in a polyethylene plastic bag. The bag should be folded over within the container.

If you decide not to use a bag, the can should be sealed with moisture proof tape. It is important that the container be clean and rust free.

Each Molecular Sieve packet contains 12.5 grams of Molecular Sieve desiccant. Using the proper amount of Molecular Sieve is important for optimum storage results. Never use more than the recommended amount.

Technical can

The following chart indicates the appropriate number of packets for different formats and roll sizes as well as placement within the container.

Film Type Size No. of Molecular Sieve Packets
65 / 70 mm 2000-foot roll 12
65 / 70 mm 1000-foot roll 6
35 mm 2,000-foot roll 6
35 mm 1,000-foot roll 3
16 mm 2,000-foot roll 3
16 mm 1,000-foot roll 2

In general, three packets, each containing 12.5 grams per 1,000 linear feet of 35mm film are recommended.

Tips on using KODAK Molecular Sieve

Thoroughly read the Safety Data Sheet (SDS).

The SDS provides valuable safety information regarding the handling of the material.

KODAK Molecular Sieves have the ability to absorb moisture from the air quickly. For maximum effectiveness care should be taken to minimize transfer time. Store unused Molecular Sieves in their original moisture proof container.

KODAK Molecular Sieve is water reactive. Material can react with water liberating extreme heat.
The Tyvek™ packet provides protection from direct contact with Molecular Sieve. Avoid using damaged or torn packets.

KODAK Molecular Sieves are supplied in strips of 6 packets. Each packet contains 12.5 grams. Scissors may be used to cut single units from a strip. Cut only in heat sealer areas. Be careful not to cut into the packet.

NAPM 1T9, 11-1992 Storage Standard recommends inspection of the film at least every two years to detect any changes in its condition. Molecular Sieve packets should be replaced every two years if stored at ambient temperatures and every 10 to 15 years if stored at NAPM recommended conditions of 2°C at 20-30% relative humidity.

Dispose of this material in accordance with the material Safety Data Sheet provided with this product. Because of loss of effectiveness, we do not recommend rejuvenation.

How to order

KODAK Molecular Sieves may be purchased directly from Eastman Kodak Company by calling Kodak Customer Service, Monday - Friday, 8:00 am to 5:00 pm Eastern Time: (800) 356-3259, use prompt 3, then prompt 1.

Email Orders:

Description Kodak Cat No.
KODAK Molecular Sieve, Acid Scavenger / 120 packets / 12.5 g each 859-7684

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