Control of discoloration in pitch pine

Specific drying conditions for control of discoloration in pitch pine were analyzed and evaluated to determine best drying temperature and moisture content (MC) to maximize high value-added uses. High-temperature kiln-drying with restraint effectively reduced twist but also caused an excessive darke...

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Published in:Forest products journal 2007-12, Vol.57 (12), p.58-64
Main Authors: Yeo, H, Eom, C.D, Han, Y, Ahn, B.J, Kim, K.M, Smith, W.B
Format: Article
Language:English
Subjects:
air drying
Analysis
Applied sciences
Degradation and preservation
discoloration
Exact sciences and technology
Experiments
Forest products industry
lumber
Mechanical woodworking and drying
Moisture content
Physical properties
Pinus rigida
Polymer industry, paints, wood
Polymers
Properties and testing
resins
Rubber goods
softwood
Studies
Temperature
Temperature effects
water content
Wood
wood drying
wood moisture
Wood products
Wood. Paper. Non wovens
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creator Yeo, H
Eom, C.D
Han, Y
Ahn, B.J
Kim, K.M
Smith, W.B
description Specific drying conditions for control of discoloration in pitch pine were analyzed and evaluated to determine best drying temperature and moisture content (MC) to maximize high value-added uses. High-temperature kiln-drying with restraint effectively reduced twist but also caused an excessive darkening stain. Further experiments showed that this stain generation is controlled by drying at conditions exceeding 100 degrees C dry-bulb only until before wood core temperature reached 100 degrees C. Results also showed accurate control of MC and finishing the drying process at the most suitable time to be important. Boards of excellent color were produced by applying a newly developed reducing temperature drying schedule for stain control. It is anticipated that higher additional value can be obtained from pitch pine, with continued studies on stain control, resin exudation, and twist restraint.
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High-temperature kiln-drying with restraint effectively reduced twist but also caused an excessive darkening stain. Further experiments showed that this stain generation is controlled by drying at conditions exceeding 100 degrees C dry-bulb only until before wood core temperature reached 100 degrees C. Results also showed accurate control of MC and finishing the drying process at the most suitable time to be important. Boards of excellent color were produced by applying a newly developed reducing temperature drying schedule for stain control. 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High-temperature kiln-drying with restraint effectively reduced twist but also caused an excessive darkening stain. Further experiments showed that this stain generation is controlled by drying at conditions exceeding 100 degrees C dry-bulb only until before wood core temperature reached 100 degrees C. Results also showed accurate control of MC and finishing the drying process at the most suitable time to be important. Boards of excellent color were produced by applying a newly developed reducing temperature drying schedule for stain control. 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source Business Source Ultimate; ABI/INFORM Global
subjects air drying
Analysis
Applied sciences
Degradation and preservation
discoloration
Exact sciences and technology
Experiments
Forest products industry
lumber
Mechanical woodworking and drying
Moisture content
Physical properties
Pinus rigida
Polymer industry, paints, wood
Polymers
Properties and testing
resins
Rubber goods
softwood
Studies
Temperature
Temperature effects
water content
Wood
wood drying
wood moisture
Wood products
Wood. Paper. Non wovens
title Control of discoloration in pitch pine
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