MIL-PRF-22019E
the package of sheets with the sealing instructions for sealing type II material and for heat-
sealing
type I material on rotary, band, and jaw-type sealing equipment. The tag or sheet shall be visible
upon opening the unit package (see 4.3.2.2).
3.6 Identification of material. The specification number, type, manufacturer's designation,
month and year of manufacture, lot number, and the notation "Seal other side" shall be clearly
and legibly marked using water-resistant ink on the backing surface of the material.
Additionally for type I materials, the manufacturer's recommended heat sealing conditions:
temperature (°F), pressure (psi), and dwell time (sec) shall be marked under the Manufacturer's
Designation. The color of the markings shall be yellow for type I and green for type II. If either
marking color (yellow or green) creates contrast issues with the color of the barrier material,
black marking shall be used. The identification shall appear in continuous rows of constantly
recurring symbols in the machine direction from one end of the sheet to the other (see 4.3.2.1).
The separation between parallel rows of recurring symbols shall be not greater than 2½-inches.
The letter and the figures shall not be less than 1/16-inch high and no more than ¼-inch high (see
4.3.2.3). Printing shall be alternating in accordance with the following example (The lines in the
example are not to be printed. The lines are shown to illustrate the offset of "Seal other side."):
Seal other side
Manufacturer's Designation Date of Manufacture Lot No. Specification No.
Type
Sealing Conditions
xxx °F; yy psi; z sec
2½-inches
(max)
Seal other side
Specification No. Type
Manufacturer's Designation
Date of Manufacture
Lot No.
Sealing Conditions
xxx °F; yy psi; z sec
3.7 Performance requirements. The performance of the barrier material shall conform to
the requirements specified in table I, when tested as specified in 4.6.
4
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