That's a mystery to me. I always figured A. saccharinum (sugar maple) was the hardest of the maples. The big lumber yard around here doesn't sell any soft maple, but they do separate the hard maple into 2 bunks - maple heart and maple sap. I have always assumed that this was because of the colour only. Sapwood for clear finishes and heartwood for paint grade.
Originally Posted by John Hemenway
I'll see if I can find out anything more about this.
All the best,
**Now holding auditions for a catchy new signature**