A simple variation of the purl stitch, purl through the back loop is a knitting technique that opens up new design possibilities. Bringing texture, definition, and variety to your knitting (or to the purl stitch) is Purl Through the Back Loop (PTBL). While many knitters are familiar with the standard purl stitch, PTBL offers a twist, literally! This technique, though seemingly simple, adds a subtle texture and uniqueness to your knitting projects. Let’s dive into how, where and why you should incorporate purl through the back loop into your knitting.
In a previous blog we had discussed about mastering knit through the back loop technique, in this blog we’ll explore purl through the back loop.
What Is Purl Through the Back Loop (PTBL)?
Purl Through the Back Loop, abbreviated as PTBL, is a variation of the traditional purl stitch. The difference lies in the way the yarn is worked through the stitch. In a regular purl stitch, you insert your knitting needle into the front leg of the stitch. In PTBL, however, you insert your needle into the back leg of the stitch, creating a twist in the fabric. This twisting alters the texture and look of the stitch, making it stand out from standard purl stitches.
When you purl through the back loop, the stitch tightens and twists slightly, resulting in a unique texture. The twist is subtle but noticeable, giving your fabric a crisper, more defined look. This can be particularly useful in projects where texture is a key design element, adding visual interest and complexity to your knitting without introducing overly complicated patterns.
How to Purl Through the Back Loop (PTBL)
If you’re familiar with the basic purl stitch, PTBL will feel natural with just a slight modification. Make a slip knot and cast on stitches. For practice, 15-20 stitches are enough.
Here’s a step-by-step guide:
Step 1 - Position your knitting needles
Start with the yarn in front, just as you would for a regular purl stitch. The stitch you’re about to purl should be on your left-hand needle.
Step 2 - Insert the needle through the back loop
Instead of inserting your right-hand needle into the front leg of the stitch (which is typical in regular purling), you will insert it into the back leg. To do this, position your needle behind the left-hand needle and enter the stitch from right to left through the back of the loop.
Step 3 - Wrap the yarn
As in a regular purl stitch, wrap the working yarn around the right-hand needle.
Step 4 - Draw the yarn through
Pull the yarn through the back loop to complete the stitch.
5. Slip the stitch off: Once you’ve drawn the yarn through, slide the old stitch off the left-hand needle.
6. Repeat: Continue purling through the back loop across the row or wherever the pattern requires.
That’s it! You’ve completed a PTBL. While the modification is slight, the impact it makes on the texture of your project can be substantial.
Why Purl Through the Back Loop (PTBL)?
PTBL is often used for specific design purposes. Here are a few reasons and contexts where this technique shines:
1. Creating Texture and Definition
The twisted nature of PTBL adds a textured look to your fabric. If you want to create raised, defined stitches, using PTBL can help. This texture can create visual interest in otherwise plain stockinette or reverse stockinette stitch patterns. It’s also a fantastic option for adding subtle details to areas like cuffs, collars, or the edges of blankets.
2. Preventing Loose Stitches
Purling through the back loop twists the stitch and tightens it up slightly, which can help control the tension in your knitting. This is especially useful if your purl stitches tend to be a bit loose or if you’re working with a particularly stretchy yarn. PTBL gives you better control over your stitch tension, making your knitting look neater and more consistent.
3. Adding Durability
The twisted stitches created by PTBL can add extra strength to your fabric. In areas of a garment or accessory that experience a lot of wear and tear—such as the heel of a sock or the cuffs of a sweater—purling through the back loop can reinforce the fabric, making it more durable without adding bulk.
4. Subtle Design Accents
While PTBL doesn’t create an overtly bold pattern, it does add a subtle twist that can serve as a delicate design feature. In combination with other stitches, PTBL can be used to create intricate textures and motifs, especially in cabled designs or twisted stitch patterns. It’s a great way to experiment with texture without overwhelming your project.
5. Improving Ribbing
PTBL is sometimes used in ribbing patterns, especially in twisted ribbing, where both knit and purl stitches are twisted. This type of ribbing is tighter and more elastic than traditional ribbing, making it ideal for cuffs, necklines, and hat brims where you want a snug fit.
When and Where to Use PTBL
PTBL can be incorporated into a variety of knitting projects. Here are a few places where it really shines:
1. Ribbing Patterns
As mentioned earlier, PTBL is often used in twisted ribbing patterns. Whether you're working on a hat, a sweater, or a pair of mittens, twisted ribbing creates a firmer, more structured edge.
2. Textured Panels in Sweaters
For knitters looking to add subtle detail to their garments, PTBL can be used in panel sections of sweaters. It adds texture without overpowering the design, and when combined with other techniques, like cables, the twisted stitches create stunning effects.
3. Socks
Socks often require a balance between elasticity and durability. Purling through the back loop in areas like the heel can provide extra strength while maintaining comfort.
4. Decorative Borders
Using PTBL in the borders of scarves, blankets, or shawls adds a delicate yet distinct touch. The twisted stitches form a clean, defined edge that can elevate the overall appearance of your project.
Purl Through the Back Loop (PTBL) is a versatile and often underappreciated technique in the world of knitting. Whether you want to add texture, enhance the durability of your fabric, or create a unique design element, PTBL has a place in your knitting repertoire. As with all techniques, the best way to master it is through practice. Work the stitch technique of PTBL into small projects like swatches, cuffs, or simple hats to familiarize yourself with the motion and its effect on your fabric.