Specifications
for Polyester: Poly(ethylene-terephthalate) Rolls
Specification Number 500-552-8/20/02
This specification is provided as a public service by the Preservation
Directorate of the Library of Congress. Any commercial reproduction
that implies endorsement of a product, service or materials, in any
publication, is strictly prohibited by law. This Specification is written
for L.C. purchasing purposes and is subject to change when necessary.
I. General Specifications - II.
Product Requirements - III. Inspection
A. Composition
-
Content:
Must be a clear, colorless, [biaxially oriented/stressed/drawn]
poly(ethylene-terephthalate) film such as DuPont Melinex® 516
or the equivalent.
- Impurities:
The clear and colorless polyester film must not contain any plasticizer,
surface coatings, UV inhibitors, or adsorbents and be guaranteed
to be non-yellowing with natural aging. As received, the film must
not contain any coloring agents.
B. Identification
There should be no identification marks on the film.
C. Packaging
- Inner Wrapper:
The polyester rolls must be carefully and securely packaged to prevent
damage to the roll.
I.D.: Each package must be identified by product
type, thickness, size and number of items within.
- Outer Wrapper:
The items must be packed in standard commercial containers which
are constructed to ensure that they arrive at the Library of
Congress
in dry, undamaged condition.
I.D.: The outside of the carton which contains
the packages should be labeled with product type, thickness,
size
and number of items in the carton, and Purchase Order or Contract
number.
D. Testing:
- Responsibility:
The supplier is responsible for meeting all the requirements specified
herein. The Library of Congress has the right to perform any of
the
tests set forth in the specification where such tests are deemed
necessary to ensure that supplies conform to prescribed requirements.
- Sampling:
To sample for testing, shipments will be sampled according to MIL-STD-105E
at inspection level S-2 with an acceptance quality level of 2.5
percent
defective from each lot offered. Copies of MIL-STD-105E are available
from Naval Publications and Forms Center, Standardization Document
Order Department, Building 4, Section D, 700 Robbins Avenue, Philadelphia,
PA 19111-5094.
E. Quality Assurance Inspection
To evaluate non-tested
requirements, shipments will be sampled according to MIL-STD-105E at
inspection level S-2 with an acceptable quality level of 4.0 percent
defective from each lot offered.
A. Construction, illustrated below
- Rolls of poly(ethylene-terephthalate) should be cut to the required
dimensions.
B. Workmanship
- Edges should be straight and clean.
- Each roll must be free of dents, dings, fingerprints, scratches,
abrasions, inclusions or other evidence of handling which would
be detrimental to performance.
An examination will be made to determine whether the items comply
with all requirements. The qualities and characteristics which will
be examined include the following.
Testing Inspection
- Materials must pass all composition and performance specifications
stated in "I. General Specifications"
Visual Inspection
- Construction
- Rolls of poly(ethylene-terephthalate) should be cut to the
required dimensions.
- Workmanship
- Edges should be straight and clean.
- Each roll must be free of dents, dings, fingerprints, scratches,
abrasions, inclusions or other evidence of handling which would
be detrimental to performance.