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Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
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Source: FPL-RN-0231, 1976

Author(s): McMILEN, J.M.

Publication Year: 1976  View PDF »

Category: Research Notes

Abstract: Producers of hard maple lumber have difficulty in consistently kiln-drying it to the normal light orange-yellow color or the verywhitest color specified for some products. For the white color, they believe winter-cut, air-dried material is required. Research has shown that normal, white, or discolored lumber can be produced from air-dried or green 4/4 or 5/4 hard maple bychanging kiln conditions. A low-temperature,low relative humidity kiln schedule producedwhite stock. A moderate-temperature,moderate-humidity schedule produced the normal-colored maple. Operational malfunc-tions that cause unwanted high-humidityconditions that produce reddish-browned stock are discussed, and precautions in usingthe low-temperature schedule are included.

Keywords: Drying, Maple sapwood, reddish-brown coloration

File size: 206 kb(s)

Date posted: 08/31/2010

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