This article is from the Textiles FAQ, by Lara Fabans lfabans@adobe.com with numerous contributions by others.
(thanks to Ingrid Verbree-Barnes)
(1) A good needle is important. Some people even suggested needles
which are made specially for jeans and denim. The size in No. 16.
(2) Flatten the humps with a hammer before you begin to sew.
(3) Prepare the hem differently. The three suggestions given for
this approach were: (i) Trim excess fabric away from the humps,
(ii) sew seam tape (or bias tape) onto the hem edge and fold this
under instead of denim, (iii) cover the raw edge with "Seams Great"
(a tricot nylon cut into thin strips) and complete the hem.
(4) Get a tool which raises the presser foot to the height of the hump
created by the seam. Some suggested tools were: (i) a jean-a-ma-jig,
(ii) a jumper humper, (iii) a freebie from Nancy Zeiman of Oxmoor House
called a plastic point turner, (iv) cardboard, wood, plastic or folded
fabric placed under the presser foot.
 
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