ProLigno / ProLigno 2007 Issue 4  
     
 
 
   
 

 


 

 

 

DRYING PROCESS FOR WHITE BEECH

Ottaviano ALLEGRETTI
PhD in Wood Science - CNR-IVALSA, Italian Research Council - Timber and Trees Institute
Adresa: Via Biasi 75, I-38010 San Michele all'Adige (TN), Italy
Tel: 0039 0461 660203. Fax: 0039 0461 650045. E-mail: allegretti@ivalsa.cnr.it

Rodolfo CIVIDINI
Private consultant
Adresa: Via dei Porta 6/1 36051 (TS), Italy
E-mail: cividinir@yahoo.com

Livio TRAVAN
Eng. - Technical assistance at NARDI International
Adresa: Via Ritonda, S.S.11, 37047 San Bonifacio (VR), Italy
E-mail: livio.t@metal-tecno.com

Abstract: According to periodical trend, the market of semi-finished wood products in Europe repeatedly de-mands dry beech with a typical natural pale colour turning to grey-white for different end uses going from furniture to interior design.
One of the main problems is that nobody really knows what white beech means, and the absence of standards and methods for grading creates confusion and misunderstanding between buyers and sellers. The general opinion is to consider white beech, the sawn timber from 25 to 100mm thick with a light and ho-mogeneous colour within the whole cross section from the surface to the core.
Those characteristics are not easy to reach, above all for large thickness timbers and during the sum-mer. Many factors influence the colour of the dried wood but the drying process, as well as the operations before drying, such as the log storage and the sawing process are fundamental. This paper condensates the experiences and knowledge of the authors and it reviews the main rules to apply during drying in order to reach good results.

Key words: drying, beech, colour modification.

REFERENCES
ALEON, D. (2002). Beech Drying with Light Colour, without Stain and with Low Residual Stresses. Proceed-ings of COST Action E15 4th Workshop, Santiago de Compostela, Spain.
ALLEGRETTI, O. (2004). Non Symmetrical Drying Test - Experimental Results for Free and Constrained Samples of Beech Wood. 5th European COST E15 Workshop, Athen.
CIVIDINI, R. (2000) Conventional Kiln-Drying of Lumber. Compendium. NARDI Srl, Italy
CIVIDINI, R.; VALENTI, L.; ALLEGRETTI, O. (2003). Investigation On MC Gradients In Vacuum-Press Drying Process Of Beech Elements. Proceedings of 8th International IUFRO Wood Drying Conference, Brasov, Ro-mania.
CIVIDINI, R. (2007). Faggio: segati. Guida all'essiccazione artificiale. NARDI Srl, Italy
KÄRKI, T.; MÖTTÖNEN, V. (2004). Preventing Discolouration of Birch (Betula pendula, B. pubescens) in HT Drying. 5th European COST E15 Workshop, Athen.
KOCH, G. (2004). Discoloration of Wood during Storage and Drying. 5th European COST E15 Workshop, Athen.
KOCH, G.; BAUCH, J. (2000). Discolouration in European Beechwood (Fagus sylvatica L.) during Storage and Drying. Proceedings of COST Action E15 2nd Workshop on Quality Drying of Hardwood, Sopron, Hun-gary.
KOCH, G.; WELLING, G. (2006). Verfarbungen - nicht immer ist die Trocknung schuld (Colour Changes - Not Always the Fault of Drying) - EDG Drying Seminar, Hamburg.
NEGRI, M.; TESSADRI, B.; GAETI, N.; VALENTI, L. (2004). Physical Properties in Wood during Press-Vacuum Drying: Colour Changes and Other Phenomena. 5th European COST E15 Workshop, Athen.

 

 
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