Pfaff 260 Owner's Manual - Page 17
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iftuwn? /l4?e?1 Typos of Fabrics Mercerized Cotton Silk Needle Size an '7h&'a? $i.c Or Fine Fabrics 80 such as georgette, chiffon, batiste, to voile, lawn, silk. ioo 0 to 000 twist 60 or 70 ar sy 13 The appearance of the finished seam is dependent n< Lightweight Fabrics 70 such as dress silks and cottons, sheers, woolens, shirting, dra. to A& B twist 80 peries. 80 on the correct relationship between needle, thread and fabric. Select the proper thread sizes and needles from this chart. Medium Fabrics 50 such as lightweight woolens, madras, muslin, brocades, heavy silks and rayon, gabardine. to 70 B&C twist 90 Heavy Fabrics such ascoatlng,denim, corduroy, slipcover fabrics, bed tickings, lightweight canvas. 40 to 50 C&D twist The same size threads should be used in the needle and on the bobbin. Some experienced seamstresses prefer a somewhat thinner bobbin thread. How ever, the bobbin thread never should be thicker than the needle thread. Very Heavy Fabrics 24 90 such as heavy TIcKrngz, canvas, overcodting, sailcloth, up to hoistery, 40 E twist to 110 Synthetics, Rayon, Acetate including nylon, orion, dacron, plastics, etc. Determined by weight of fabric 40 to 50 Determined bythresdsiz 60 to 80 16