MIL-DTL-2427H (AR)
d. A solution of Cunapsol 5 (copper napthenate) reduced down with water to 2
percent copper as metal.
e. Alternatively, Grade A boxes, individual or palletized or the finished wood
parts thereof, shall be completely flooded for a minimum of one minute in PQ56, M-
GARD W510 or Cunapsol 5 preservative, as applicable. All interior and exterior surfaces
(when finished wood parts are dipped) are to be completely inundated with preservative.
Care shall be exercised to assure complete coverage of all surfaces of the board.
Immediately following the dip treatment, wood products being treated shall be drained
for a period of not less than 5 minutes. If wood products are palletized, the pallet load
shall be tipped on edge to facilitate thorough drainage. After the dip treatment, the boxes
must be air dried for a period of 24 hours minimum providing thru ventilation thus
allowing full air circulation around all surfaces of the wood box. Accelerated drying in an
oven or kiln is permitted providing oven or kiln temperature does not exceed 160° F. The
boxes must be air dried to a maximum moisture content of 18 percent when tested in
accordance with 4.4.2 prior to shipment.
3.10.1 Presence of PQ56 (copper-8-quinolinolate) preservative. When treated
with PQ56, the box shall show evidence of discoloration when tested as specified in
4.4.5.
3.10.2 Presence of M-GARD W550 (zinc naphthenate emulsifiable) preservative.
When treated with M-GARD W550, the box shall show evidence of discoloration when
treated as specified in 4.4.6.
3.10.3 Presence of M-GARD- W 510 (copper naphthenate) or Cunapsol 5 (copper
naphthenate) preservative. When treated with M-GARD W510 or Cunapsol 5, the box
shall show evidence of discoloration when tested as specified in 4.4.7.
3.11 Heat treatment (Grade A and B only). Boxes shall be fabricated from wood
heat treated to a core temperature of 56 degrees Celsius for a minimum of 30 minutes or
shall be heat treated to the same requirement after box fabrication. For Grade A boxes,
heat treatment shall take place prior to preservation application. The box manufacturer
shall be affiliated with an inspection agency accredited by the United States Department
of Agriculture. Each box shall be marked to show conformance to the International Plant
Protection Convention Standard. The quality mark shall be placed on both ends of the
box between the end cleats or end battens.
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