Why Is Yarn Waxed? A Complete Guide to Yarn Waxing for Knitting Machines
Anyone who buys yarn for knitting machines will often come across a little-known but essential process: yarn waxing.
Many people ask:
- Why is yarn waxed?
- How often should yarn be re-waxed?
- How long does the wax last?
- Can you knit with unwaxed yarn?
The short answer is simple: wax is essential to ensure smooth knitting, reduce friction, and protect both the yarn and the knitting machine.
Let's take a closer look.
What Is Yarn Waxing?
Yarn waxing is the process of passing the yarn through a special wax disc that deposits a very thin lubricating layer onto the surface of the yarn.
The purpose is not to change the characteristics of the fiber, but simply to improve its ability to run smoothly through the knitting machine.
The amount of wax applied is extremely small—almost imperceptible to the touch—but enough to significantly reduce friction.
Why Does Yarn Need to Be Waxed?
During knitting, the yarn passes through dozens of contact points, including:
- yarn guides;
- tension devices;
- needles;
- sinkers;
- yarn feeders;
- eyelets;
- guide mechanisms.
Every contact point creates friction.
Without proper lubrication, the following problems may occur:
- increased yarn tension;
- unexpected yarn breakages;
- greater lint formation;
- premature needle wear;
- irregular knitting;
- defects in the finished fabric.
Wax greatly reduces these issues.
What Are the Benefits of Yarn Waxing?
Proper waxing offers several important advantages:
- smoother knitting at higher speeds;
- fewer yarn breaks;
- more consistent yarn tension;
- better stitch quality;
- reduced needle wear;
- less lint generation;
- improved machine efficiency.
For these reasons, virtually every professional knitting factory waxes yarn before production.
How Long Does the Wax Last?
This is one of the most frequently asked questions.
The wax coating is not permanent.
Over time it gradually tends to:
- partially evaporate;
- oxidize;
- lose its lubricating properties;
- become less evenly distributed.
In addition, normal handling and transportation of the cones slowly remove part of the wax layer.
As a general rule, freshly waxed yarn maintains good lubrication for several months when stored correctly.
However, if the yarn remains in storage for a long period—especially one year or more—it is advisable to re-wax it before knitting.
How Often Should Yarn Be Re-Waxed?
There is no universal rule.
It mainly depends on:
- the age of the yarn;
- storage conditions;
- temperature;
- humidity;
- fiber type.
As a practical guideline:
- Newly produced yarn is normally ready to use.
- Yarn stored for a few months is generally still suitable.
- Yarn stored for one year or longer should preferably be re-waxed.
Many knitting factories choose to re-wax every cone before starting production, regardless of its age.
It only takes a few seconds and can prevent many production problems.
Why Is Stock Yarn Often Re-Waxed?
In the stock yarn industry, it is common to purchase yarn originating from:
- spinning mills;
- knitting factories;
- textile manufacturers;
- surplus production lots.
These yarns may have been stored for months or even years.
Although the quality of the fiber generally remains unchanged, the wax coating may have lost part of its effectiveness.
For this reason, many customers prefer to re-wax the yarn before using it.
What Happens If You Knit with Unwaxed Yarn?
Technically, it is possible—but it is strongly discouraged.
Especially on industrial knitting machines, using unwaxed yarn may lead to:
- more frequent yarn breakages;
- inconsistent yarn tension;
- dropped stitches;
- machine stoppages;
- faster needle wear;
- defects in the finished garment.
With delicate fibers such as cashmere, extra-fine merino wool, alpaca, or other luxury blends, the difference between waxed and unwaxed yarn can be significant.
Does Wax Damage the Yarn?
Absolutely not.
The wax used for textile yarns is specifically designed for knitting applications.
Only a microscopic amount is applied to the yarn, and most of it is removed during the garment's first washing or finishing process.
It does not affect:
- softness;
- handle;
- color;
- fiber quality.
Its only purpose is to improve knitting performance.
How Is Yarn Waxed?
The process is extremely simple.
The yarn is passed through a manual or automatic waxing device fitted with a special wax disc before entering the knitting machine.
The entire operation takes only a few seconds and can save hours of production downtime.
Yarn waxing is one of the simplest yet most important operations in machine knitting.
Proper lubrication ensures smoother production, reduces yarn breakage, protects the machine's needles, and helps achieve a higher-quality finished garment.
If you are working with yarn that has been stored for a long time—especially stock yarn—it is always good practice to check the condition of the wax coating and re-wax the yarn if necessary before production.
Just a few seconds spent waxing the yarn can make the difference between a smooth production run and hours of unnecessary machine stoppages.
