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New Zealand Journal of Forestry (2013) 57(4): 24–26
©New Zealand Institute of Forestry

Professional Paper
Intra-ring internal checking in radiata pine

Dave Cown 1

1 Senior Scientist, Scion, Rotorua

Intra-ring checking, and its effect on value recovery from clearwood products has produced significant industry interest. In recent years Wood Quality Initiative and Solid Wood Innovation have funded a large amount of research in the hope of uncovering specific causes and eventually eliminating it as a serious defect in radiata pine. Within-ring checking is specific type of internal checking. The checks are contained within single growth rings and not apparent on the surface, as distinct from surface checking which is clearly visible. It is only after the kiln drying process that these checks become visible. Depending on the severity of the defect, it can cause rejects, raw material losses and increased processing costs.
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