Fabric Bias and Binding
presented by Honorable Lady Simona della Luna
at King’s College 2016 in the Barony of Namron, Kingdom of Ansteorra
m.k.a. Star Maddox Star.Maddox@gmail.com
loom illustration by Pearson Scott Foresman, from Wiki Commons
original woven fabric illustration by PKM at English Wikipedia, modified by Star Maddox
A glossary and a list of additional resources may be found at the end of this handout. The most up to date version of this handout may be found at http://lavorodellaluna.blogspot.com.
What is bias
When woven fabric is made, the loom is set up with long warp threads. Then the weft thread is passed from left to right and back agin, forming the cloth. Sometimes the warp and weft threads are the same fiber, strength, and spacing, and sometimes they are different. The far left and right edges of the cloth are woven in a slightly different style, forming the non-fraying selvage edges. If a strip of cloth or pattern piece is on the straight of grain, it is in line with the warp threads. If it is on the cross grain, it is lined up with the weft threads. If it is on the bias, it is oriented at a 45 degree angle to the warp and weft threads. The grain line marked on pattern pieces is intended to be matched to the straight of grain, though for some fabrics the cross grain will work as well, as long as the warp and weft threads are the same.