Specifications
for Spacer Boards
Specification Number 600-601-6/19/02
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. Stock Composition
- Pulp:
- Fiber: The stock should be made from rag or other
high alpha-cellulose content pulp. It must not contain any post
consumer waste recycled pulp.
- Lignin: The stock must give a negative reading
for lignin as determined by the phloroglucinol test when tested
according to ASTM D 1030, X5 spot stains and shall have a Kappa
number of 5 or less when tested according to TAPPI T 236 cm-85.
- Impurities: The stock must be free of metal particles,
waxes, plasticizers, residual bleach, peroxide, sulfur (which will
be less than 0.0008% reducible sulfur as determined by TAPPI T 406
om-88), and other components that could lead to the degradation
of the paper and artifacts stored therein.
- Metallic Impurities: Iron must not exceed 150
ppm and copper shall not exceed 6 PPM when test according to TAPPI
T 266
- Optical Brighteners: The stock must be free
of optical brightening agents.
- pH:
The stock should have a pH value of 8.0 - 9.5 as determined by TAPPI
T 509 om-88, cold extraction (modified by slurrying sample pulp before
measurement).
- Alkaline Reserve:
The alkaline reserve should be a minimum of 2% and a maximum of 5%
calculated as CaCO3 when tested according to ASTM 4988-89.
- Sizing:
Only neutral or alkaline sizing shall be used. No alum rosin or rosin
sizing should be used as determined by ASTM D 549-88.
- Color:
The color of the stock will normally be tan, cream, buff or will be
specified on the purchase order. The color must not be so dark that
it obscures color-dependent test evaluations.
Bleeding: The color must show no bleeding when soaked
in distilled water for 48 hours while held under suitable weight in
contact with white bond paper. The color must not rub off.
Retention: The color of the stock must not change
more than 5 points of brightness as measured by directional reflectance
at 457 nm (TAPPI T 452 om-92), when exposed 24 hours to a Xenon arc
lamp in an Atlas Weatherometer under the following conditions: Irradiance
Level: 1.0 watts/m2 at 420 NM Inner filter: Borosilicate glass. Outer
filter: clear soda lime glass. Black panel temperature: 50°C. Wet
bulb depression: 8.5°C.
B. Workmanship
Edges should be cut square and clean, and sizes accurate.
C. Identification
No identification marks are necessary.
D. Packaging
- Inner Wrapper:
I.D.:Each package must plainly identify the type,
size and number of items within, the name of the supplier or manufacturer,
year of manufacture, manufacturing run or batch number, actual pH.
- 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.
ID: The outside of each container must be identified
by type, size and number of items within, manufacturing run or batch
number and Purchase Order number or Contract number.
E. 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.
- Methods:
Tests will be conducted in accordance with specified test methods
of the American National Standards Institute (ANSI), the American
Society for Testing and Materials (ASTM), and the Technical Association
of the Pulp and Paper Industry (TAPPI). Publications describing these
tests may be ordered directly from the technical associations at the
following address:
- ANSI, 1430 Broadway, New York, NY 10018
- ASTM, 1916 Race Street, Philadelphia, PA 19103
- TAPPI, One Dunwoody Park, Atlanta, GA 30348
- Tests:
Requirements
|
Test Method |
Lignin: |
negative/Kappa 5 |
ASTM D 1030, X5 or TAPPI 236 cm-85 |
Reducible Sulfur: |
< 0.0008% |
TAPPI T 406 om-88 |
Iron: |
< 150 PPM |
TAPPI T-266 |
Copper: |
< 6 PPM |
TAPPI T-266 |
pH: |
8.0 - 9.5 pH |
TAPPI T 509 om-88. cold extraction, slurried pulp |
Alkaline Reserve: |
2 - 5% |
ASTM D 4988-89 |
Alum Rosin Sizing: |
negative. |
ASTM D 549-88 |
Color Bleeding: |
none |
See above, "I. 8. Color" |
Color Retention: |
< 5 points |
TAPPI T 452 om-87 |
F. Quality Assurance Inspection
- Sampling:
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
- The Spacer Boards should be constructed of a single sheet of B-Flute
corrugated board.
- Each board should be creased vertically 6 times from both the right
and left edges, totaling 12 creases.
- The spacing between each crease should be one inch.
- The center part of the Spacer Board should not be creased for 11
3/4 inches.
B. Workmanship
- The board must not split, fray or crack along folds or creases
- No identification marks are necessary.
- The color should be white, tan, cream, buff, gray or as specified
- Edges must be cut square and clean
- Sizes must be accurate
C. Dimensions
Each Spacer Board should be 23 3/4 x 8 inches.
arrows indicate direction of grain
An examination will be made to determine whether the items comply with
the Requirements Sections. 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
- The board must not split, fray or crack along folds or creases
- No identification marks are necessary.
- The color should be white, tan, cream, buff, gray or as specified
- Edges must be cut square and clean
- Sizes must be accurate
- The dimensions should be 23 3/4 x 8 inches.
- The spacer boards should be constructed of a single sheet of B-Flute
corrugated board.
- Each board should be creased vertically 6 times from both the right
and left edges, totalling 12 creases.
- The spacing between each crease should be one inch.
- The center part of the Spacer Board should not be creased for 11
3/4 inches.
- The inner wrapper must be according to size and identified as specified
- The outer wrapper must ensure arrival in dry, undamaged condition
FAILURE TO MEET ANY OF THE SPECIFICATIONS WILL BE CAUSE
FOR REJECTION.