Definitions for "Blue Stain"
Discoloration of sapwood due to fungus.
A fungus discoloration, predominantly bluish, but sometimes grayish, blackish, or brownish in appearance; confined almost exclusively to sapwood; common in pines.
a deep-seated discolouration of wood resulting from fungus attack; predominantly bluish but sometimes having a grey or brown tint; confined almost exclusively to sapwood.
Blue stains caused by a chemical reaction of iron coming in contact with the tannic acid in the wood.
Blue stains on the surface of the veneer which occur through insufficient water extraction when slicing (too low heating capacity on the pressure bar or when slicing too fast) because water remaining on the surface of the veneer turns blue through oxidation.