This invention provides a method of forming fancy yarns which does not require a fancy twisting frame. The method according to the present invention involves supplying a fibrous foundation strand and a fibrous effect strand to a pair of drafting rollers, the foundation strand being supplied from a drafting restraint such as a double apron and the fibrous effect strand being supplied immediately before the rollers without restraint whereby portions of the effect strand are snatched through the rollers and are incorporated into the foundation strand as randomly spaced irregularities which persist when the combined strands are spun into a yarn. The method can be used to make slub yarns, for example of wool, which may have a foundation including a synthetic multifilament reinforcing core. By back-twisting the resultant yarn with a binding yarn a slub gimp yarn can be produced.
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