Acids : Damages, Weakens fiber Alkalies : Resistant (mercerization) Effect of sunlight : Weakens fiber slowly. Insects : Silverfish damages fiber. To flame : Burns readily. Shape : Fairly uniform in width, 12 - 20 ?, length varies from � to 2� inches.

8. Zig zag stitched seam finish: This type of finish is more suitable for natural fur and fake fur fabric. Trim seam allowance to 1/8 and stitch with plain zig zag stitches. 9. Bound seam finish: Bound binding in especially good for finishing seams in an unlined jacket or coat. Press the seam open on the wrong side and wrap a bias around it, with wider side of tape underneath, stitch close to edge of top fold, catching underneath fold in stitching.