Invisible thread myths.
 

http://www.42quilts.com/2018/07/no-i...JgsT6QVRA#more

She is so right about the nylon thread. Throw it out. LOL

I CONCUR!! I am just finishing a banner for a neighbor to present to her church....All done in Upholstery weight velvet and tapestry, with 3" letters and numbers appliquéd onto the light background velvet. (Letters and numbers are a Teal velvet).....I had, and started using the nylon invisible thread and can I tell you what A PAIN that was!!! Breakage, stretching........Switched to Sulky polyester invisible thread and did not have one second's trouble from that point on! Cannot post pic as it is not completed hence not presented yet.......But make sure, when you need invisible thread, to always use the polyester and not the nylon!