What type of and/ or brand of table saw blade would be good for making knife scales from boards?

I mainly use a band saw to slice scales because they cut smoother than a table saw but just about any table saw blade should work.

My band saw is a 10" and with the widest blade I still get a little wave on the cut.  As long as I have a real flat side to glue to I guess it doesn't matter.  I found a new 104 tooth blade that is a fine crosscut, I will try that and see if I can get it to cut smooth.

Neutron, after discussing with scale sellers at Blade....they are using big commercial grade bandsaws and as madness says...using the deepest blade they can get on their bandsaw.

Get the widest blade your saw will handle and that will help with some of the waviness.  Are you using a fence?  With most band saws to get the best cut the fence isn't at a 90 to the blade.  You'll have to play with that adjustment a little to find the sweet spot so your cuts will be the best they can be.

Another way to get them dead flat without power tools is to spray adhesive on a flat piece of granite and hand sand them. Take a pencil and make marks on the side you want flat.  When all the marks are gone you have a flat scale.