L-T-80C
3.2.1 Resistance to weathering. When tested in accordance with 4.4.8, the tape shall show no visual
evidence of lifting, curling, buckling, component separation or other degradation that would make it
unfit for an external sealing media.
3.2.2 Corrosivity. Following the exposure to weathering (see 4.4.8), the test panels shall show no
evidence of pitting or corrosion in the areas covered by the tape specimens.
3.3 Rolls. The tape shall be furnished in evenly and uniformly wound rolls, adhesive side in, on cores
made of paper fiber or non-fibrous plastic. The core shall have sufficient rigidity to prevent distortion of
the roll under normal conditions of transportation, storage, and use. The inside diameter of the core
shall be 3, +1/16, -0 inches.
3.3.1 Length and splices. Unless otherwise specified in the contract or purchase order (see 6.2), the tape
shall be furnished in rolls of 60 yards minimum length. Each roll shall consist of a single length of tape
or of two or more lengths spliced together in such a manner that the splices will not separate when the
roll is being unwound for inspection or during machine or manual application. No roll shall contain
more than three splices (four pieces) (see 3.5).
3.3.2 Width. The width of the rolls shall be ½, ¾, 1, 1 ½, 2 inches, or other commercially available
width as specified in the contract or purchase order (see 6.2). A tolerance of plus or minus 1/32 inch
shall be allowed in each width.
3.3.3 Marking. On direct shipment to the Government, each roll of tape shall be marked in or on the
edge of the core with the manufacturer's name and tape designation (full or coded) and the date of
manufacture (full or coded).
3.3.3.1 Containers. Containers of the tape shall be marked in accordance with the requirements of PPP-T-
680 and of 3.3.3 of this specification. In the event of conflict, this specification shall govern.
3.4 Suitability (compatibility) for use with explosives. (Applicable only when specifically designated in
the applicable contract, order, or specification). When specified in the contract or purchase order (see
6.2), application shall be made to a Government laboratory or other Government approved laboratory
designated by the procuring agency for determination of the ability of the tape for use with a particular
explosive or explosives.
3.5 Workmanship. Workmanship shall be in accordance with the best commercial practice. The tape
shall be clean and free from foreign matter and defects that may impair its serviceability or appearance.
The edges of the tape shall be straight, true, and unbroken.
4. QUALITY ASSURANCE PROVISIONS
4.1 Classification of inspections. The inspection requirements specified herein are classified as follows:
a. Responsibility for inspection (see 4.2).
b. Quality conformance inspection (see 4.3).
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