Bad news (sanding Black Walnut to 10'000-grit)

[chatometry]

Bad news after sanding a black walnut sample up to 10'000-grit.
That is, chatoyance keeps growing as grit increases, and even at 10'000-grit it looks like it's still growing!
In addition, chatoyance after finishing with shellac is significantly higher on this ultra-fine-sanded sample than on its bookmatched twin, which was sanded to 240-grit.

Sample 1 after sanding to 240-grit:


Sample 1 after sanding to 10'000-grit:


More info here, after the Iroko section:

Progressive grit sanding – PZC Chatometry

Paolo

 

[2feathers Creative Making]

Shellac is easier...

 

[chatometry]

That's the point! Ultra-fine sanding + shellac gives more chatoyance than normal sanding + shellac!
That is, at least on these black walnut samples.

 

[chatometry]

After these results, we repeated the same test on 4 more species (iroko, sapele, black locust and spanish cedar). In all the cases, sanding to 10'000 provided much higher chatoyance also after finishing!

More data here:

Ultra-fine sanding – PZC Chatometry

 

[JerseyHighlander]

Iodine... Black Walnut is full of it.

 

[chatometry]

Is there a way to remove it?
Paolo

 

[JerseyHighlander]

Is there a way to remove it?
Paolo

I doubt it. It's a component throughout the tree.