My issue with polyester thread/cotton thread (hot iron)
FYI - Polyester thread and the hot iron don't agree. I have used poly thread as long as I can remember until yesterday when I called my sister and asked what she used to piece her quilt tops. Her answer was Brooks cotton quilting thread. - Well - She never told me this or why. I found out why Sunday. After ironing a GMFG top that I started over 25 years ago, I placed the top on the quilt frame and noticed a scorched piece. As I was removing it I could not see the thread to pick with the seam ripper, so turned it over and picked from the other side to realize that the thread on the other side had 'melted'. This was true on 4 of the 6 seams. --- I will continue to use the poly thread I have, but be aware of the heat factor. I will also be looking for large spools of cotton thread to use in the future. My quilts are for me and family, but I do have plans for some quilts that will have that extra effort. With those I will use the cotton thread. -- I always felt that polyester was stronger than cotton. I have been proved wrong with the heat factor in play. My first 2 quilts were polyester doubleknit. They will last for ever. Already rebacked them twice.