Attachment J1 - Appendix 1 - 600-613-24 - REVISED FOR AMEND 3.pdf

Library of Congress Preservation Directorate Specification 600‐613 – 24 1

Library of Congress Preservation Directorate

Specification Number 600‐613 – 24

Specifications for Single wall B‐Flute Corrugated Board For Storage Trays

(Box) For High Density Storage Environments

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. If you are reading a paper copy of this specification please check our website for the most up‐to‐date version.

Scope

Corrugated board that meets the requirements set forth in this specification is intended for use in the construction of storage tray boxes for high density storage environments that house of library materials. Construction may be either die‐cut or machine cut by either contracted or in‐house operations.

1. Composition and Chemical Requirements

1.1 Fiber

The stock used for both the liner and the medium must be made from rag or other high alpha‐ cellulose content pulp, minimum of 87%. It must not contain any post‐consumer waste recycled pulp.

1.2 Lignin

The stock used for both the liner and the medium must give a negative reading for lignin as determined by the phloroglucinol test when tested according to TAPPI T 401, Appendix F, or shall have a Kappa number of 5 or less when tested according to TAPPI T 236.

1.3 Impurities

The stock used for both the liner and the medium 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), and other components that could lead to the degradation of the board itself, or the artifacts stored therein.

1.4 Metallic Impurities

Iron must not exceed 150 ppm and copper shall not exceed 6 ppm when tested according to TAPPI

T 266.

1.5 Optical Brighteners

The stock used for both the liner and the medium must be free of optical brightening agents.

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1.6 pH

The stock used for both the liner and the medium must have a pH value within a range of 7.5 ‐10 as determined by TAPPI T 509, cold extraction (modified by slurrying sample pulp before measurement).

1.7 Alkaline Reserve

The stock used for both the liner and the medium must contain an alkaline reserve greater than 2% calculated as CaCO3 when tested according to TAPPI T 553 (modified by slurrying sample pulp before measurement).

1.8 Sizing

Only neutral or alkaline sizing shall be used. No alum rosin or rosin sizing should be used, as determined by TAPPI T 408.

2. Physical and Performance Requirements

2.1 Basis Weight

The stock must meet the following requirements for basis weight as determined by TAPPI T 410.

2.1.1 Liner

The minimum basis weight should be 35 Lbs. / 1,000 ft²

2.1.2 Medium

The minimum basis weight should be 26 Lbs. / 1,000 ft²

2.2 Color

The color of the stock should be manila, unless otherwise specified on the purchase order. The color must not be so dark that it obscures color‐dependent test evaluations, e.g., spot stain tests.

2.3 Color 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.

2.4 Color 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), 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.

2.5 Surfaces and Smoothness

The outer surface of the liner board should be finished to resist soiling and must be free of fingerprints, dirt, bubbles, knots, shives and other imperfections.

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2.6 Scores and Folds

The liner facings must show no visual surface breaks longer than 1/2ʺ inch when scored and/or folded 180 degrees parallel to the flutes of the board. Test will be conducted as described for single wall corrugated fiberboard, section 9.3 of ASTM D 4727.

2.7 Adhesion of Liner and Medium

The corrugated bond strength between the medium and liner must meet a minimum requirement of 48 Lbs. per lineal foot of glue line, when tested according to TAPPI T 821.

2.9 Delamination

There must be no continuous visual surface break of the plies when the board is flexed 180 degrees both parallel and across the flutes when tested as described for single wall corrugated fiberboard, section 9.3 of ASTM D 4727.

2.10 Bending Stiffness

The board must meet a minimum requirement of 40 lbf per inch in the machine direction, and 20 lbf per inch in the cross direction, when tested according to TAPPI T 836.

2.11 Flat Crush

The board must meet a minimum requirement of 48 psi when tested according to TAPPI T 825.

2.12 Adhesive

The adhesive must not soften or run. The adhesive must not cause the stock to become transparent or alter the color of the stock. The adhesive must not yellow, discolor, or fail (causing delamination) over time. The adhesive should not contain sulfur, iron, copper or other ingredients that may be detrimental to photographic materials. The adhesive should not contain or generate oxidants. Pressure‐sensitive or rubber‐based adhesives are not acceptable. The adhesive must not extend beyond the joined area.

3. Product Requirements

3.1 Construction

The boards should be constructed as single‐wall B‐Flute corrugated board, as defined in section 6.4 of ASTM D 4727. Each sheet should be constructed with the flutes running parallel to the long dimension of the sheet. The smoothest side (felt side) of the liners should be the outer surfaces of the board. The wire side of the liners should be next to the corrugated medium, to promote maximum adhesion. The flutes of the medium must be adhered to each liner all along the tips of the flutes.

3.2 Workmanship

Edges must be cut square and clean, and sizes accurate.

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3.3 Dimensions

Any uncut sheet of B‐Flute board should be a maximum of 48 x 96 inches, or a minimum of 48 x 56

1/2 inches, or as specified on the purchase order.

3.5 Marking

There must be no identification marks on the board.

4. Packaging and Identification

4.1 Inner Packages

Each package must plainly identify the type, size and number of items within, the name of the supplier or manufacturer, year of manufacture, and manufacturing run or batch number.

4.2 Outer Package

The items must be packed in standard commercial containers that are constructed to ensure that they arrive at the Library of Congress in dry, undamaged condition. The outside of each container must be identified by type, size and number of items within; manufacturing run or batch number;

LC Purchase Order / Contract number and line number.

5. Compliance with Specification

5.1 Quality Assurance Testing

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.

5.2 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), the Technical

Association of the Pulp and Paper Industry (TAPPI), and the International Organization for

Standardization (ISO). Publications describing these tests may be ordered directly from the technical associations, their websites, or other on‐line standards vendors.

5.3 Acceptance

Materials will be accepted when the Library of Congress has ascertained that the products comply with all parts of the specification. A quick reference table of the physical and chemical requirements and test methods used to ascertain compliance is provided in section 5.4.

FAILURE TO MEET ANY PART OF THE SPECIFICATION WILL BE CAUSE FOR REJECTION

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5.4 Table of Physical and Chemical Requirements and Test Methods

Property Requirement Test Method

Lignin Negative / Kappa 5

TAPPI T 401,

Appendix F or TAPPI

T 236

Reducible Sulfur < 0.0008% TAPPI T 406

Iron ≤ 150 ppm TAPPI T 266

Copper ≤ 6 ppm TAPPI T 266 pH 7.5 ‐ 10

TAPPI T 509, cold extraction, slurried pulp

Alkaline Reserve > 2% TAPPI T 553, slurried pulp

Alum Rosin Sizing Negative TAPPI T 408

Basis Weight ‐ minimum Liner: 35 Lbs. / 1,000 ft²

Medium: 26 Lbs. / 1,000 ft²

TAPPI T 410

Color Bleeding No bleed in 48 hours See section 2.3

Color Retention |≤ 5 pts| TAPPI T 452

Creases and Folds No fraying, cracking, splitting

ASTM D 4727, section

9.3

Delamination No continuous break ASTM D 4727, section

9.3

Flat Crush ≥ 48 psi TAPPI T 825

Liner Adhesion ≥ 48 Lbs. per lineal foot TAPPI T 821

Bending Stiffness ‐ minimum 40 lbf/ in MD

20 lbf/ in CD

TAPPI T 836

Configuration Management

Date Revision History

14 May 2024 Initial release of document.