MIL-DTL-17667E
4.5.2 Spring back. Cut ten strips, each 2 inches by 8 inches, in both the machine and cross
machine direction of representative sample sheets. Lay the specimen on a hard smooth surface
and fold, without creasing, 2 inches of the strip onto itself. Gently place a 1-pound flat bottom
weight, 1-3/4 inches in diameter on the fold. The weight shall be centered on the fold. After 30
seconds, gently remove the weight and, by means of a protractor, determine the angle of spring
back 30 seconds after removing the weight. Determine the spring back angle for ten specimens
in each direction of the paper, testing five in each direction for each side of the paper. Record
the average in each direction.
4.5.3 Hydrogen Ion concentration (pH). Place 5 grams of air-dried shredded neutral paper in
a 500 milliliters (mL) heat resistant Pyrex Erlenmeyer (or equivalent) flask and add 250 mL of
boiling distilled or deionized water free of CO2 and having a pH between 6.7 and 7.1. To avoid
the tendency of the fibers to float on the surface, the flask shall be well shaken. Attach a water-
cooled condenser and reflux gently for one hour with occasional shaking to ensure that all of the
fibers are immersed in the water. Stopper the flask, then cool the solution to test conditions.
Determine the pH of the extract electrometrically, using a glass or quinhydrone electrode and
calomel cell, or colorimetrically, using isohydric indicators. The average of three separate tests
shall be determined. Electrometric determination of pH is preferred for control testing.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in
the contract or order (see 6.2). When actual packaging of materiel is to be performed by DoD or
in-house contractor personnel, these personnel need to contact the responsible packaging activity
to ascertain packaging requirements. Packaging requirements are maintained by the Inventory
Control Point's packaging activities within the Military Service or Defense Agency, or within the
military service's system commands. Packaging data retrieval is available from the managing
Military Department's or Defense Agency's automated packaging files, CD-ROM products, or
by contacting the responsible packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but
is not mandatory.)
6.1 Intended use. The chemically neutral, non-corrosive wrapping paper covered by this
specification is intended for use in specialized military methods of preservation.
MIL-DTL-17667 is a premier material required for the Navy's Prime Program. It provides a
neutral wrap or cushioning material for unique Navy plastic disposal requirements in a marine
environment.
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