SewIY conductive thread is a novel multimaterial composite braid.  Most conductive threads are made by twisting yarns made of spun conductive staple fibers.  Some threads use traditional textile materials that have been surface-treated with silver or other conductors.  For comparison, even the highest quality stainless steel conductive threads:

-Are not insulated

-Are not solderable

-Are noticeably stiffer and coarser

-Are more difficult to sew with

-Have 21 times or greater linear resistance 

-Have significantly lower current carrying capacity

SewIY thread can be hand or machine sewn.  When using a sewing or embroidery machine load the thread in the bottom bobbin.  We recommend using straight stitches.  You can add extra stitches where you plan to make soldered connections and then use a seam ripper to release the extra thread.  This extra thread can then be pulled through your PCB for soldering while allowing you to form continuous routes.

SewIY thread is designed to be soldered to both rigid and flex through-hole PCBs.  Be generous with your solder to help bathe the conductors and form a uniform joint.  Your soldering iron's temperature should be set to 710° F or 376° C.  Check out our soldering guide here for more details.

SewIY thread is tough.  We recommend using flush cutters or thread scissors.  Do not try to break the thread by hand.