How to Keep Both Working Yarns Between the Layers in Double Knitting

In this method, stitches for two layers alternate on one needle. You knit a stitch belonging to the layer facing you, then purl a stitch belonging to the opposite layer. Together, these make one double stitch pair. The Knitting Guild Association describes this alternating method separately from double-knitting methods that work one layer while slipping the other. The Knitting Guild Association: Double Knitting

“Front” and “back” describe yarn position relative to the needles as you hold the work. They do not permanently identify either fabric layer. When you turn the knitting, the opposite face comes toward you.

The unused strand needs to stay behind a stitch on the facing layer and in front of a stitch on the opposite layer. Both positions place it inside the fabric. For stockinette double knitting, that produces the convenient both-back, both-forward routine. Textured double knitting can require different positions, so follow its specific instructions. Stitch Diva Studios: Position of the Working Yarn

Practice the following sequence away from any special edge stitches. Let A be the color wanted on the facing layer and B the color wanted on the opposite layer for this pair.

1. Move both strands back. Check that neither strand remains hanging across the facing surface.
2. Knit one stitch with A only. Leave B unused behind the needles.
3. Bring both strands forward between the needle tips. Include A even though the next stitch uses B.
4. Purl one stitch with B only. Leave A unused in front.
5. Take both strands back between the tips, ready for the next pair. Nimble Needles: How to Double Knit for Beginners

A useful practice cue is “position both, work one.” Pause after positioning the strands and identify the color you will wrap. This separates two decisions that can otherwise become muddled: where both strands belong and which strand forms the stitch.

Move the strands through the gap between the needle tips. Carrying them over a needle can create an unintended yarn over, adding a stitch and a hole. Search Press explains this distinction in its corrected instructions for switching between knit and purl stitches. Search Press: Beginner’s Guide to Knitting—Errata

You can hold both strands in your left hand, both in your right hand, or one in each hand. Consistent strand arrangement matters more than choosing one universal grip. The Knitting Guild Association illustrates all three approaches. The Knitting Guild Association: Double Knitting

To choose a grip, make three slow stitch pairs and pause before every wrap. Can you identify both strands? Can you move the unused strand along with the active one? Can you select one without accidentally wrapping both? Use those observations to adjust your hold.

If holding one strand in each hand makes you leave the unused strand behind during a transition, rehearse moving both hands before forming the stitch. If holding both in one hand makes color selection difficult, pause and separate the strands before wrapping. Change one part of the routine at a time so you can tell what helps.

The following exercise uses eight pairs so you can inspect an entire row easily. Its open sides are intentional: edge finishing can wait until the positioning routine is clear.

Using two contrasting yarns of the same weight and suitable needles, make eight long-tail cast-on stitches with both strands held together. Each doubled cast-on stitch supplies two loops to work separately, giving 16 individual stitches after the first row. Stitch Diva documents this paired cast-on approach. Stitch Diva Studios: Casting On / Binding Off

• Row 1: Work each doubled cast-on stitch as two separate loops: knit the first loop with A, then purl the second with B, using the both-back, both-forward sequence. Repeat eight times.
• Row 2: Turn. Knit with B and purl with A across all eight pairs.
• Rows 3–8: Repeat Rows 1 and 2 three more times. For this exercise, avoid deliberately crossing the strands at the side edges.
• After every row: Count 16 individual stitches and inspect both faces. Checking both sides regularly is also recommended by Stitch Diva Studios.

To finish the sample, hold both yarns together and knit the two stitches of each pair together. Bind off these resulting stitches in the usual way, passing the previous stitch over the newest one. This joins the layers along the top; Stitch Diva describes binding off paired stitches with both strands. Stitch Diva Studios: Casting On / Binding Off

After turning a plain two-color swatch, the previous opposite layer becomes the facing layer. Its color now supplies the knit stitches. The movement stays the same: both strands back for the knit, both forward for the purl.

For a standard reversible colorwork pair, change which color you use without changing the knit–purl order. If the facing stitch should change from A to B, knit it with B, then purl its companion with A. Nimble Needles demonstrates this color exchange and explains that it connects the layers at the motif transition. Nimble Needles: How to Double Knit for Beginners

For example, an illustrative run of four facing stitches in A, B, B, A becomes four pairs: knit A/purl B; knit B/purl A; knit B/purl A; knit A/purl B. Move both yarns before every individual stitch. Consult your pattern’s chart key for its row-reading convention.

Use this checkpoint sequence after a row. It separates yarn-positioning errors from color-selection and stitch-count errors.

What you notice	What to check next
An unused strand crosses an outside face	At the next knit–purl transition, watch whether both strands move together.
Both colors form one loop	Check whether you wrapped both strands instead of selecting one.
The stitch count has increased	Look for an unintended yarn over where the strands moved over a needle.
The colors differ from your intended sequence	Write out each knit–purl pair and compare the colors used.
The side edges remain separate	Check whether your pattern calls for an edge connection.

This is a practical diagnostic sequence derived from the positioning, wrapping, and edge instructions above. Locate the first incorrect pair before continuing; adding rows makes the original transition harder to examine. For an extra stitch caused by a yarn over, the between-the-tips movement is the specific habit to revisit. Search Press: Beginner’s Guide to Knitting—Errata

Keep ordinary stitch transitions separate from edge treatment. For a closed side edge, The Knitting Guild Association describes wrapping the newly used color around the other color at the beginning of the row. Without an edge connection, the sides can remain open. Use your project’s specified selvedge consistently. The Knitting Guild Association: Double Knitting

Return to your project once you can work the practice rows while accounting for both strands at every transition. Before each stitch, check their position; then choose the color and form the loop. That small pause gives you a clear routine to follow through plain sections, turns, and color changes.

• Position of the Working Yarn — Stitch Diva Studios
• Double Knitting — Jennifer Kent, The Knitting Guild Association, Cast On Spring 2024
• How to Double Knit for Beginners — Nimble Needles
• Casting On / Binding Off — Stitch Diva Studios
• Beginner’s Guide to Knitting — Errata, Search Press