I turned a dark walnut bowl from kiln dried wood (that is what it was advertised as).  It has now warped 5/16" and looks like an egg.  I bought kiln dried wood and was wondering why it would warp so much?  How do I tell if wood is in fact kiln dried meaning it is supposed to be dry and any warpage would be at a very minimum?  Turn out a small portion of the center and let it dry more before finishing it?

Thanks,

Nevin 

A piece that thick was probably dry near the surface but still had some moisture deeper. Rough turning first, allowing it to equalize and then finishing it off is probably the best approach. Measuring the weight is the most accurate method for determining how dry it is. 
 

I’m not sure if there is a standard for what constitutes “kiln dried” and most moisture meters read only to a shallow depth. 

I agree with Lew. Kiln drying would take a long time for wood that thick so it seems strange it would be attempted. Walnut is usually very stable .

Can't answer this question but I do love "Tried and True" finish, I used a couple weeks ago and it was wonderful.

Wood is a dynamic material and will always, always move and react to it's environment. In addition, removing the center of a piece that thick relieves a lot stress and stability. I expect every bowl I turn to warp to some degree.

6 hours ago, John Morris said:

Can't answer this question but I do love "Tried and True" finish, I used a couple weeks ago and it was wonderful.

Yes, I have found it to be very good myself.  I usually apply a polish over it to help bring out more shine in the wood.  Other times I put on 2-3 coats and just buff it out with fine steel wool.  Thanks for your comment. ~ Nevin

14 hours ago, lew said:

A piece that thick was probably dry near the surface but still had some moisture deeper. Rough turning first, allowing it to equalize and then finishing it off is probably the best approach. Measuring the weight is the most accurate method for determining how dry it is. 
 

I’m not sure if there is a standard for what constitutes “kiln dried” and most moisture meters read only to a shallow depth. 

Thank you, I was expecting some warping but 5/16" was more than I thought would happen.

 

Next bowl I turn I will rough it first and let it sit for a week or two before finishing it. ~ Nevin