| Doesn't really do anything, or else there'd be no strings without it. And lots of strings don't have any silk on them. It might have helped keep strings together before there was consistent winding available, and it MIGHT keep hardware from getting scratched (though you'd have to be pretty anal to worry about whether the strings leave a mark on the barrel of your tuning machines). Mostly it identifies stuff now, like D'Addario used to do with the silk on the Slo-Wounds, or trying to pin down a brand (e.g. the peculiar red that GHS used on Boomers).
John
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"Without space, music is just noise piling up on itself." TRK
Lakland Owners' Club # 248
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