MANUAL ON THE PROPERTIES AND USES OF LESSER ... - ITTO

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FinishingNatural DurabilityTreatabilitySpecies with good machining prbperty orsurface quality are preferred for productsrequiring smooth surfaces such as flooring,furniture, novelty items, toys, sporting goodsand tool handles. LUS are grouped into thefollowing machining characteristics, namely:Class I - Very good (95-100% defect-freesurface; very good surface quality); Class 11-Good (85-94% defect-free surface; goodsurface quality); Fair (75-84% defect-freesurface; fair surface quality); Poor (65-74%defect-free surface; poor surface quality).Refers to operations involved in the applicationof transparent or opaque liquid coatings onthe wood to protect and enhance its durabilityand appearance. LUS are classified into thefollowing groupings based on finishingcharacteristics, namely: Class I - Good to verygood (sands and takes stains and varnish verywell); Class 11 - Fair (sands and takes stainswell); Class III - Poor (poor sanding)Refers to its ability to resist the attacks ofdeteriorating organisms. Although wood isnot completely immune to such attacks, anumber possesses superior resistance. LUSare grouped according to the following naturaldurability classes, namely: Class I - Durable(more than 7 years); Class 11 - Moderatelydurable (4-7 years); Class III - Slightly durable(2.5-4 years); Class IV Non-durable (1-2.5years); Class V Perishable (less than 1 year).Refers to the ease with which species of woodtakes in preservatives using vacuum orpressure process. This serves as a guide forthe wood preserving industry in formulatingtreatment schedules for different species.LUS are grouped according to the followingdurability classes, namely: Class I - Easy totreat (practically complete penetration ofchemical preservatives); Class IT - Moderatelydifficult to treat (limited side penetration ofchemical preservatives); Class III - Verydifficult to treat (practically no sidepenetration of chemical preservatives).8
6. END-<strong>USES</strong>Refers to the listing of current and potential industrial end-uses of each LUS based onR & D results conducted by the Forest Products Research and Development Institute andfrom available industry market information.7. ILLUSTRATI<strong>ON</strong>Refers to the photographed LDS wood samples taken in either quarter-sawn or flatsawnsurface. The wood samples were properly identified and carefully selected to ensurethat it will be true presentation of its original source.9
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