Preservation

Low Lignin Archives Box

First Issued January, 1991

Scope

This specification covers the requirements for an assembled, low lignin, metal edged archives box with a hinged lid and a telescoping shallow front. Figure 3-1

Requirements

Construction

The assembled box shall consist of one paperboard box blank with metal edge stays oriented and secured on the box joints as indicated in Figure 3-1.

Dimensions

The dimensions of the box shall be specified in the contract as inside measurements in the following order: length, width, and depth.

Paperboard

Composition

The paperboard for the box shall be made from cotton or linen pulp, fully bleached chemical wood pulp, or a mixture. The paperboard shall be free of groundwood (ASTM D 1030, X 5 Spot Stains and TAPPI T-236-85), alum-rosin sizing (ASTM D549-88), particles of metal, waxes, plasticizers (i.e. wet strength additives), plastics, and shall contain less than 0.0008 percent reducible sulfur (TAPPI T-406om-88). Surfaces shall be free of knots, shives, and abrasive particles.

Sizing

Alkaline sizing (surface, internal, or both) shall be used. (ASTM D4988-89)

Alkaline Reserve

The paperboard shall have a minimum of 3 percent calcium carbonate, magnesium carbonate, or a combination of both evenly distributed throughout all plies and layers. when tested according to ASTM D4988-89.

Hydrogen Ion Concentration (pH)

The pH value of the paperboard shall be between 8.0 and 10.0 when tested according to TAPPI T-509om-88.

Lignin

To demonstrate the adequacy of bleaching or lignin removal, all plies and layers of the paperboard shall give a negative reading to the phloroglucinol test when tested according to ASTM D1030 or shall have a Kappa number of 5 or less when tested according to TAPPI T-236cm-85.

Abrasion

Outer surfaces of the paperboard shall show a loss of less than 0.7 percent of the total weight (mounting card and sample) when tested with #CS 10 wheel and 100 wear cycles (TAPPI T-476om-84).

Surface Smoothness (to determine the property of adhesion of a pressure sensitive label to the paperboard surface)

The surface of the paperboard shall hold a piece of weighted pressure sensitive tape securely in place for at least 10 minutes in 6 out of 9 trials, when tested according to ASTM D286-90, Procedure B modified as follows

use a 3/4" wide, office pressure sensitive tape to conduct the test

adhere the tape to the paperboard surface with 2 rolls of a 10kg steel roller

suspend a 2oz weight from the tape.

Thickness

The paperboard thickness shall be 0.060 inches plus or minus 0.005 inches, when tested according to TAPPI T-411om-84.

Stiffness

The paperboard shall have an internal stiffness of at least 1,800 Tabor stiffness units in the machine direction and 800 Tabor stiffness units in the cross direction at 15 degrees deflection, when tested according to TAPPI T-489om-86.

Finish

The paperboard shall be plate finished (calendered) on both sides.

Color retention

Dyes used to color the paperboard shall show no bleeding when soaked in distilled water for 48 hours while held in direct contact with white bond paper. The board shall not show a loss or gain of more than 5 points of brightness after exposure in a Sunlighter II apparatus for 96 hours or a fadeometer for 36 hours, when tested according to TAPPI T-452om-87.

Adhesive

Water resistant adhesive shall be used when laminating two or more thicknesses of paperboard together to form a single board of the required thickness. When aged in an oven at 50 degrees centigrade and 87 percent relative humidity, the adhesive used shall not soften or run, but shall hold the two or more thicknesses of paperboard firmly together. The properties of the adhesive shall not detract from the properties of the paperboard (i.e. reduce the alkaline reserve, increase the percentage of sulfur, decrease the pH, decrease the stiffness). The adhesive shall not be visible through or alter the color of the paperboard. If it is necessary to buffer the adhesive, the same buffer as in the paperboard (i.e. calcium carbonate, magnesium carbonate, or a combination of both) shall be used.

Metal Edge Stay

General Information

metal edge stay shall be used to securely fasten together the joints of the box and lid.(See Figure 3-1.) It shall be made from a single unit of .0088 gauge cold rolled steel coated on the exterior with lacquer or baked enamel. It shall be positioned on the box so that at both ends it extends to within 1/4" of the edge of the paperboard.

Finish

The outer surface of the metal edge stay shall be free of sharp, raised edges

Color

The color of the metal edge stay shall be specified in the contract

Dimensions

The metal edge stay shall be 1 inch wide and shall contain 8, 4-prong eyelets per 2 inch length.

Pull Cord

General

The box shall have a nylon pull cord mechanically attached (i.e., using no adhesives) to the inside bottom front of each box. (See Figure 3-1.) The pull cord shall be formed into a loop and fastened together at the two free ends with a metal clasp. It shall measure 5" (plus or minus 1/8") x 1/16" and shall extend 2 to 3 inches out from the edge of the box

Attachment

The pull cord shall withstand being pulled apart at the metal clasp when the following test procedure is used.

Cut the pull cord in half at the point opposite the metal clasp.

Mount the two loose ends in the jaws of an Instron Tensile Tester.

Use an Instron Tensile Tester with a 50 kilogram load cell, the jaws set 2 inches apart, and the cross head and chart speeds set at 10 inches per minute.

To pass the test, the cord shall not pull apart at the metal clasp when it is subjected to a force of up to 8 kilograms.

Color Retention

Dyes used to color the pull cord shall show no bleeding when the pull cord is soaked in distilled water for 48 hours while held in direct contact with white bond paper. The dyes shall resist transfer when the dry pull cord is rubbed against a piece of Whatman #1 filter paper.

Workmanship

Each box shall meet the requirements stated in this specification, shall be constructed in accordance with good commercial practice, and shall be free of imperfections that may affect its utility or aesthetic appearance.

Each box shall be made to the dimensions specified. All panels shall fit closely without gaps or warping. All edges shall be cut straight and shall be smooth and even. The corners of the box shall be square. The bottom of the box shall rest evenly on a flat plane. The completed box shall contain no surface dirt (smudges, fingerprints, and the like) and no oozed adhesive and shall not be marred (dents, bumps, and the like) in any way.

The paperboard shall be scored and creased uniformly. Scores and creases shall be deep enough to permit precise folding during construction. All folded edges shall be free of fraying, cracks, and breaks. The lid shall be able to withstand repeated opening without cracking, splitting, fraying, or otherwise losing strength along the hinge.

Adhesive, when used, shall be uniformly applied to all surfaces to provide a firm, even attachment of all components.

Each metal edge stay shall be made to the dimensions specified. Each shall securely fasten together the joints of the box and shall be positioned as specified. All the prongs of each metal edge stay shall fully penetrate the paperboard so that they are visible on the inside of the box or lid.

The pull cord shall be made to the dimensions specified. It shall be attached to the box as specified.

Identification Markings

The following information shall be legibly embossed on the outside bottom of each box: name of manufacturer, pH range, year of manufacture, and the words low lignin.

Preparation for Delivery

Packaging

The archives boxes shall be packed in a standard commercial container that is sealed with tape. The number of boxes to be packed in each container shall be specified in the purchase order.

Marking

The outside of each packing container shall be legibly marked with the following information: the purchase order number and the type, size, and number of archives boxes packed in the container.

Quality Assurance Provisions

Tests

Test procedures and controls specified in this document shall be used to determine the quality of the product. Other procedures and controls must be approved by the National Archives before test results will be accepted. Unless otherwise indicated, the tests shall be performed at and the samples conditioned to standard conditions of 73 degrees Fahrenheit (plus or minus 3.5 degrees) and 50 percent relative humidity (plus or minus 2 percent RH.) (See TAPPI T 402om-88.)

Test Methods

The requirements for paperboard quality and characteristics shall be tested in accordance with specified test methods of 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 addresses:

ASTM - American Society for Testing and Materials 1916, Race Street Philadelphia, PA 19103

TAPPI - The Technical Association of the Pulp and Paper Industry, One Dunwoody Park, Atlanta, Georgia 30348

Tests for Paperboard Quality

The requirements for paperboard quality shall be tested according to the following methods:

Requirements Test Method
Lignin (See p.1 )
-Phloroglucinol
-Kappa number

ASTM D1030, X5 Spot Stains
TAPPI T-236cm-85
Rosin (Raspail test) (See p.1 ) ASTM D549-88
Reducible Sulfur (See p.1 ) TAPPI T-406om-88
Sizing (See p.1 ) ASTM D4988-89
Alkaline reserve (See p.1) ASTM D4988-89
Hydrogen Ion concentration (See p.1) TAPPI T-509om-88
Abrasion (See p. 2) TAPPI T-476om 84
Surface Smoothness (for label adhesion)(See p.2) ASTM D286om-90
Thickness (See p.2) TAPPI T411om 84
Stiffness (See p.2 ) TAPPI T-489om-86
Color Retention (See p.2) TAPPI T-452om-87

Test for Pull Cord Strength

The adequacy of the attachment of the pull cord at the metal clasp shall be tested according to procedures described under the Pull Cord subsection of the Requirements section, on page 3 of this specification.

Responsibility for Tests

Unless otherwise specified in the purchase order, the supplier is responsible for the performance of all requirements specified herein. Unless otherwise specified, the supplier may use his or her own facilities or any commercial laboratory acceptable to the National Archives. The National Archives reserves the right to perform any of the tests set forth in the specification where such tests are deemed necessary to assure that supplies and services conform to prescribed requirements.

Inspection

Examination Criteria

An examination shall be made to determine whether the completed box complies with the Requirements section (see pages 1-4). The qualities and characteristics that shall be regarded as unacceptable in the completed box are listed below.

Completed Box

Not style specified

Not dimensions specified

Not materials (qualities or characteristics) specified

Not color specified

Not construction specified

Not identification markings specified

Workmanship

Edges not cut straight, not smooth and even

Scores and creases not deep enough to permit precise folding during construction

Corners of the box, not square

Box not capable of being opened repeatedly without cracking, splitting, fraying, or otherwise losing strength along the hinge of the lid

Folded edges showing exterior splits and cracks

Box warped and uneven on flat surface

Lid bows open; not a snug fit

Panels are gaped or bulged and are not aligned properly

Surfaces not dean or smooth: not free of oozed adhesive, smudges, fingerprints or dirt; not free of lumps or indentations

Surfaces torn, scuffed, or otherwise physically marred

Metal edge stay not attached securely

Edge stay not oriented as specified

Surface of metal edge stay has sharp, raised edges

Pull cord not securely attached at the metal clasp

Packaging for Delivery

An examination shall be made to determine whether the packaging of the boxes for delivery complies with the requirements of Preparation for Delivery section of this specification. The characteristics that shall be regarded as unacceptable in the packaging are listed below.

Not number of boxes per container specified in contract

Container not sealed with tape

Container not legibly marked with the purchase order number

Container not legibly marked with type of archives boxes within

Container not legibly marked with size of archives boxes within

Container not legibly marked with number of archives boxes within

Responsibility for Inspection

Unless otherwise specified in the purchase order, the supplier is responsible for the performance of all inspection requirements specified herein. The National Archives reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure that supplies and service conform to the prescribed requirements.

Sampling for Examination

Construction and Workmanship

To sample boxes for construction and workmanship, boxes shall be selected according to MILSTD-105E at inspection level S-2 with an acceptable quality level of 4.0 percent defective from each lot of material offered.

Testing

To sample boxes for testing, boxes shall be selected according to MIL-STD-1O5E at inspection level S-2 with an acceptable quality level of 2.5 percent defective from each lot of material offered.

Preparation for Delivery

To sample boxes for compliance with packaging and marking requirements, boxes shall be selected according to MIL-STD-105E at inspection level S-2 with an acceptable quality level of 4.0 defective from each lot of material offered.

Sampling Method

The sampling of boxes for examination shall be carried out according to methods specified in "Sampling Procedures and Tables for Inspection by Attributes", MIL-STD-105E, issued January 2,1990 and available from Naval Publications and Forms Center; Standardization Document Order Department, Building 4, Section D; 700 Robbins Avenue; Philadelphia, Pennsylvania 19111-5094.

Ordering Information

The following information shall be included in the purchase order:

Title and date of the specification

Box dimensions

Color of box, metal edge stay, and nylon cord

Number of boxes required

Purchase order number

Number of boxes per shipping container

Special delivery conditions

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