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Z Twist vs S Twist

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May 8, 2020 Ashlea 1 Comment

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When new to spinning yarn, you may find yourself asking what is Z twist, and what is S twist, and what difference does it make? This post will clear that up for you!

Z Twist vs S Twist

Z twist or S twist simply refers to the direction in which your wheel or spindle is spinning while you spin your fiber into yarn. If the wheel is spinning to the right as you look at it (clockwise) that is a Z twist, and if the wheel is spinning to the left (counter-clockwise) that is an S twist. (If using a drop spindle, it is the direction the spindle is going as you’re looking down at it.)

z twist or s twist handspun yarn

What difference does it make, you ask? How you ply!

When spinning yarn, you will always spin in one direction and then ply the yarn in the opposite direction. This helps to balance the yarn, create a stronger yarn, and to remove any extra twist from each of the singles.

Traditionally speaking, when spinning a single yarn (one bobbin) you will use a Z twist. Then when you go to ply that bobbin (either by plying additional singles or a Navajo (aka Chain) ply), you will use an S twist.

Technically speaking, however, as long as you ply in the opposite direction from which you spun your singles, it doesn’t really matter which direction you start with. For example, if you are a crocheter, you may find that the opposite makes a better working yarn for you. (S twist to spin and Z twist to ply.) This is because of how the yarn is wrapped around the hook while you’re crocheting with it. As a crocheter, this matters to me.

As long as you start one way and finish the other, the yarn will theoretically be sufficient for all kinds of uses.

How to tell which twist is which:

To discern whether a yarn was spun with S or Z twist, look at it vertically. Yes, even commercially made yarns.

The fibers will either run top left to bottom right like this in an S twist:

S twist yarn

s twist yarn

OR

Top right to bottom left, like this in a Z twist:

Z twist yarn

z twist yarn

If you think about the center part of the letters S or Z, you can see why the first is called an S twist while the second is called a Z twist. Cool, right?

If you’re looking at a yarn that has already been plied and the fibers run top left to bottom right, that means that it was plied using S twist, and – if done correctly, originally spun using a Z twist.

Plying and Finishing beginner, how to spin, twist

Comments

  1. Novella Creasman says

    September 10, 2020 at 6:04 am

    Thank you for this information, I want to learn to spin fibers, and i read any and everything i can find. I have get to buy a wheel or fiber, but your article has helped more than most. Thanks again. What would u recommend on a wheel for a beginner , Electric is how i am leaning? Reply if u can to this comment.

    Reply

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Hi! I’m Ashlea, the fiber enthusiast behind this crazy little yarn spinning blog. I am a fiber loving crochet addict that enjoys a good audio book and long spinning session. Read more about me here.

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