Comments on: Why do hems roll up? http://www.fashion-incubator.com/archive/why_do_hems_roll_up/ How to start a clothing line or run the one you have, better. Sat, 11 Feb 2012 20:30:46 -0800 http://wordpress.org/?v=2.8.4 hourly 1 By: anne http://www.fashion-incubator.com/archive/why_do_hems_roll_up/comment-page-1/#comment-4028 anne Wed, 08 Nov 2006 04:36:03 +0000 http://www.fashion-incubator.com/2006/07/why_do_hems_roll_up/#comment-4028 Could it also be because there's all that extra weight on the back? Not to discount the other issues, but a hem on a pair of heavyweight jeans is a lot of thick layers of fabric in a relatively narrow area. Knit fabric (single-knit jersey) rolls towards the knit side and away from the purl side because there's more yarn on the purl side - all those wiggly bits (technical term - and the smooth knit side basically loses the tension fight. Knit designers get around that by adding purl stitches on the edges - ribbing or knit/purl patterns like seed/moss stitch. Surprisingly, you don't need a 50/50 proportion of knit to purl stitches to stop the roll. I can't remember the requirements, but it's no more than three knit stitches to one purl, maybe less. Could it also be because there’s all that extra weight on the back? Not to discount the other issues, but a hem on a pair of heavyweight jeans is a lot of thick layers of fabric in a relatively narrow area.

Knit fabric (single-knit jersey) rolls towards the knit side and away from the purl side because there’s more yarn on the purl side – all those wiggly bits (technical term – and the smooth knit side basically loses the tension fight. Knit designers get around that by adding purl stitches on the edges – ribbing or knit/purl patterns like seed/moss stitch. Surprisingly, you don’t need a 50/50 proportion of knit to purl stitches to stop the roll. I can’t remember the requirements, but it’s no more than three knit stitches to one purl, maybe less.

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