Tuesday 12 February 2013

What are the grades? Select, Standard and Better or Feature?

Timber is graded to a face grade. Otherwise the quality is consistent in machining. The face is examined to determine if there are signs of gum vein. The more gum marks the more the timber is featured. Some people find gum marks attractive. Others don't.

Face vein: This is the amount of gum vein allowed in the face of the timber.

Australian timber is gum rich and therefore it naturally has a lot of features. The percentage of gum vein in the face of the timber determines the grade.


SELECT GRADE


Select - up to 5% gum vein to face
Standard & Better - up to 15/20% gum vein to face
Feature - up to 30/40% gum vein to face.


All grading is visual and therefore has a degree of variation because it is based in the perception of the persons involved in the process. It has a limited degree of accuracy.

NOTE: Mills adopt their own procedures for grading and so grades will vary from mill to mill. There is tolerance between batches though this is small.




Pricing is decided according to the amount of feature in the face of the timber. The less feature the greater the price.



FEATURE GRADE

No comments:

Post a Comment