Originally Posted by
BellaBoo
The wt and ply of a thread is more important then the type of thread. I think 50 wt 3ply thread is too heavy for piecing. Poly thread is stronger so it can be made thinner. Most top brands of piecing thread is poly. Most all bobbin thread used for bobbins is poly. I like cotton 2 ply 50 wt, like Aurifil for piecing. 70 wt poly for the bobbin. Superior threads has the best education site for threads and what needle size to use with each thread type.
Most top thread makers make both poly and cotton. Their usages is up to the user. I don't know of any thread designated piecing thread.
I don't know why there would be any reason to use cotton in the top and poly on the bottom when piecing.
I use Prescencia and Aurifil for piecing, quilting and hand finishing the binding. I have several different weights of both. They're both pretty low lint for cotton thread. I don't even own any poly thread.