Knit Lace: Slip-Stitch Ripples

(multiple of 18 sts plus 1)

Rows 1, 3 and 5 (RS) Knit. 
Rows 2 and 4 K1, *sl 2 sts purlwise wyib, k1; rep from * to end. 
Row 6 P1, *yo, p4, p2tog, [k1, p1] twice, k1, ssp, p4, yo, p1; rep from * to end. 
Row 7 *K2, yo, k4, ssk, p1, k1, p1, k2tog, k4, yo, k1; rep from *, end k1. 
Row 8 P1, *p2, yo, p4, p2tog, k1, ssp, p4, yo, p3; rep from * to end. 
Row 9 *K4, yo, k4, k3tog, k4, yo, k3; rep from *, end k1. 
Rows 10, 12, and 14 Purl. 
Rows 11 and 13 *P1, sl 2 sts purlwise wyif; rep from *, end p1. 
Row 15 *K1, yo, k4, ssk, [p1, k1] twice, p1, k2tog, k4, yo; rep from *, end k1. 
Row 16 P1, *p1, yo, p4, p2tog, k1, p1, k1, ssp, p4, yo, p2; rep from * to end. 
Row 17 *K3, yo, k4, ssk, p1, k2tog, k4, yo, k2; rep from *, end k1. 
Row 18 P1, *p3, yo, p4, p3tog, p4, yo, p4; rep from * to end. 
Rep rows 1–18 once more. 
Rows 19-22 Rep rows 1–4.

Click for explanation and illustration
k = knit sl = slip
k2tog = knit 2 together ssk = slip, slip, knit
k3tog = knit 3 together st(s) = stitch(es)
p = purl wyib = with yarn in back
p2tog = purl 2 together wyif = with yarn in front
rep = repeat(s)(ing) yo = yarn over
RS = Right Side  

Reprinted from Vogue Knitting Stitchionary Volume Five: Lace, with permission from 6th&Spring Books; copyright 2010; photos by Jack Deutsch Studio. All rights reserved.