How deep does this stain go in this walnut slab?

[bradleyheathhays]

I'm surfacing this 2" walnut slab on the CNC, and I'm wondering what this dark coloring is on the lighter sap wood and how deep it goes? I don't have a lot of experience with walnut, and I haven't seen this kind of coloring in other peoples' projects, so I don't know what to think.

Will this unwanted dark color possibly lessen as I take more layers off?

 

[daniscool]

I'm surfacing this 2" walnut slab on the CNC, and I'm wondering what this dark coloring is on the lighter sap wood and how deep it goes? I don't have a lot of experience with walnut, and I haven't seen this kind of coloring in other peoples' projects, so I don't know what to think.

Will this unwanted dark color possibly lessen as I take more layers off?

View attachment 288885

View attachment 288886

It be is unlikely to lessen. If it is visible from the other side and/or the edge, then you can’t really get rid of it by thicknessing. You could table saw it off. It looks interesting though. Why remove it?

 

[vegas urban lumber]

is it mineral staining or some sort of spalting? if so it likely continues through

 

[DLJeffs]

Agreed. That stain entered the sap wood from the outside, not from the side you're surfacing. Therefore, if the stain is present on both sides of your board, it most surely goes all the way through.

 

[Mike1950]

Embrace it. Finished it will look great. Above info is correct.