What Is Superwash Wool and How Is It Made

Table of Contents

What Is Superwash Wool and How Is It Made
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Superwash wool lets you enjoy wearing wool without worrying about shrinking or felting. You can put superwash wool items in the washing machine, making laundry much easier. This means you spend less time taking care of your superwash wool garments. Many people like superwash wool because you can wash it in a machine and it feels smooth to the touch. This easy-care superwash wool is perfect for busy parents and anyone who wants to keep things simple. Superwash wool is easier to wash, so it’s great for people who want less work and more free time.

Key Takeaways

  • Superwash wool is changed to take off tiny scales. It gets a coating to stop shrinking and felting. This makes it safe for washing machines and easy to care for.

  • The usual chlorine-Hercosett process uses chemicals to stop wool from shrinking. But these chemicals can hurt the environment. Newer ways use safer and greener treatments.

  • Superwash wool feels smooth and keeps bright colors. It is good for things like socks and baby clothes. But it might lose its shape and warmth after some time.

  • Non-superwash wool keeps its natural feel, warmth, and shape. But you must wash it gently by hand and take more care. This helps stop shrinking or felting.

  • To keep superwash wool clothes nice, wash them gently in cold water with wool detergent. Do not use bleach. Dry them with care.

Superwash Wool

Superwash Wool
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Definition

You might wonder how superwash wool is not like regular wool. Superwash wool is made by treating wool in a special way. The process takes away the tiny scales on each wool fiber. Then, the fibers get covered with a thin plastic-like layer called Hercosett. This layer stops the fibers from sticking together when washed. Because of this, superwash wool does not shrink or felt in the washing machine. You can find superwash wool by looking for “machine washable” labels. The yarn feels smooth and looks bright because of this treatment. Some people argue if superwash wool is still “natural” since it has a plastic-like cover, but many people like it because it is easy to care for.

Key Features

When you pick superwash yarns, you get some special benefits. Here are the main things you will notice:

  • Superwash wool does not felt or shrink, so you can wash it in a machine.

  • The treatment makes the yarn smooth and shiny, so it feels soft and looks bright.

  • Superwash yarns take dye well, so your projects have bold, bright colors.

  • You do not have to hand wash superwash wool. You can use your washing machine and save time.

  • Superwash yarns are good for things you use a lot, like socks, sweaters, and baby clothes.

Karida, who started Neighborhood Fibre Co, says untreated wool “feels like wool,” blooms well, and keeps its shape after blocking. Superwash wool lets you use the washing machine, but it does not have all these natural traits. Many people now want untreated yarns because they like the woolly feel and care about the planet.

You might see that superwash yarns do not have the same smell or feel as untreated wool. Untreated wool blooms and keeps its shape, which is good for lace shawls. Superwash yarns are easy to care for, so many knitters and crocheters use them for everyday things.

Here is a simple table to help you see the differences:

Feature

Superwash Wool

Untreated Wool

Machine Washable

Yes

No

Felting Resistance

High

Low

Color Vibrancy

Bright

Natural

Texture

Smooth, less woolly

Woolly, blooms

Environmental Impact

Less sustainable

More sustainable

You can choose the yarn that works best for you. Superwash yarns are easy to care for and have bright colors. Untreated wool feels more natural and keeps its shape better.

Superwash Process

Chlorine-Hercosett Method

The chlorine-Hercosett method is the most common superwash process. Most machine-washable wool yarns use this method. This process changes wool so it does not shrink or felt in the wash. Untreated wool has tiny scales on each fiber. These scales make the fibers stick together when washed. That is why wool shrinks and felts. The superwash process soaks wool in a chlorine solution. This chemical bath removes the rough scales and makes the surface smooth. After soaking, the wool is rinsed to wash away any chlorine left. Next, the fibers get a thin layer of Hercosett resin. This resin acts like a plastic shield. It covers the wool and seals the surface. The fibers cannot catch on each other anymore. Superwash wool stays soft and smooth after many washes. Studies show that the scales are gone after this treatment. The wool does not felt anymore.

Here are the main steps in the chlorine-Hercosett process:

  1. Soak wool in a chlorine solution to remove the scales.

  2. Rinse and clean the wool to stop the chlorine.

  3. Coat the fibers with Hercosett resin to seal them.

  4. Add a softener, dry the wool, and get it ready for spinning.

You can see the main chemicals and what they do in this table:

Chemical / Material

Role / Function

Gaseous chlorine

Removes scales from wool fibers

Sodium hypochlorite (NaOCl)

Another way to make the cleaning agent

Dichloroisocyanuric acid (DCCA)

Another option for cleaning the fibers

Hypochlorous acid (HOCl)

The main cleaning agent during the process

Metabisulfite

Neutralizes leftover chlorine to protect the wool

Hercosett resin

Coats the fibers to stop felting and shrinking

Sodium bicarbonate

Keeps the right pH for the resin to work

Silicone resin

Adds extra softness and shine

Sodium hydroxide (in scrubber)

Stops chlorine gas from escaping into the air

This superwash process makes wool easy to care for and machine washable. You can use it for socks, sweaters, and baby clothes. You do not have to worry about shrinkage. The process is also called shrink-proofing because it stops wool from getting smaller in the wash.

Note: The chlorine-Hercosett method works well, but it uses strong chemicals. Some people worry about the waste and pollution from this process.

Alternative Methods

You might want a greener way to make superwash wool. Today, there are new superwash methods that avoid harsh chemicals. These methods help protect the environment. They use natural salts, air, or enzymes instead of chlorine.

Here are some main alternative superwash processes:

Alternative Method

Description

Environmental Impact / By-products

Certification / Sustainability Indicators

EXP Process (Schoeller)

Uses natural salts and eco-friendly polymers to treat the wool surface.

No toxic waste; safer for water and soil

bluesign®, GOTS certified

Naturetexx® Plasma

Uses air and electricity (plasma) to change the wool surface. No chemicals or water needed.

Chemical-free; uses renewable energy

bluesign®, GOTS, OEKO-TEX®, IVN Best certified

Ozone Treatment

Uses ozone gas to remove scales, leaving only water and oxygen as by-products.

Very clean; no harmful waste

Not yet common in stores

Enzyme Coating

Uses natural enzymes to make wool machine-washable.

May be sustainable; more research needed

Not widely available yet

These new superwash methods help you pick wool that is better for the planet. For example, the EXP process uses natural salts and does not make toxic waste. The Naturetexx Plasma method uses only air and electricity. It does not pollute water or soil. Ozone treatment is also very clean, but it is not common yet. Enzyme coatings look promising, but scientists are still studying them.

  • The old chlorine-Hercosett process makes toxic waste and uses strong chemicals. This waste can hurt water and soil.

  • The EXP and Naturetexx Plasma methods avoid these problems. They use safer materials and make less pollution.

  • Ozone and enzyme methods also help the environment, but you may not see them in every store.

Tip: If you want to buy more sustainable superwash wool, look for labels like bluesign® or GOTS. These show the wool was treated with safer, greener methods.

You have more choices now. You can pick traditional superwash wool for easy care. Or you can choose new, eco-friendly options that help protect the earth.

Superwash vs. Non-Superwash

Properties

When you look at superwash and non-superwash yarns, you can spot some big differences. The table below helps you see how each type is different in feel, strength, care, and more:

Attribute

Superwash Yarn

Non-Superwash Yarn

Texture

Smoother, softer; less natural elasticity and stitch definition

Natural scales and texture; better stitch definition; rustic look

Durability

Resists shrinkage and felting; good for frequent washing

Durable for heavy wear but can felt or shrink if not washed carefully

Care Requirements

Machine washable and dryable; low-maintenance

Needs hand washing; higher maintenance to avoid felting and shrinkage

Environmental Impact

More chemical processing; less eco-friendly

Less chemical processing; more environmentally friendly

Cost

Often more expensive

Usually less expensive

Superwash yarns are easy to wash and feel soft. Non-superwash yarns keep the wool’s natural feel and warmth. Superwash yarns do not wick moisture as well. This is because the treatment takes away the scales that help with heat and moisture.

Pros and Cons

Think about the good and bad sides before you pick your yarn.

Advantages of superwash:

Disadvantages of superwash:

Tip: If you want something better for the earth, non-superwash yarns use fewer chemicals and keep more of wool’s natural traits.

Uses

You will see superwash yarns in many things you use every day. Companies use them a lot for socks, especially for sports and travel. You also find them in baby clothes, sweaters, and other things you wash often. Superwash yarns are good for running, hiking, skiing, and travel socks. They do not felt and stay soft after many washes.

Non-superwash yarns are best for projects where you want warmth and texture. Many people use them for shawls, hats, and special pieces. These yarns work best if you can hand wash and block them gently.

Environmental Impact

Chemical Concerns

If you pick superwash wool, you should know its effects on nature. The usual way uses chlorine to take off the scales from wool. This step makes chemical waste that can hurt water and dirt. Factories try to clean this waste, but some chemicals still get into rivers and lakes. These chemicals can harm fish and other animals.

The process also puts a plastic-like layer on the wool. When you wash these clothes, tiny plastic bits called microplastics can come off. These microplastics travel in water and end up in the ocean. They do not go away and can hurt sea animals.

Here are the main worries about superwash wool:

  • Chlorine and strong chemicals dirty water and hurt water life.

  • The plastic layer lets out microplastics when washed, which pollute water and harm animals.

  • The process uses lots of water and power, which is bad for the earth.

  • The treatment can make wool less warm and less able to breathe.

Note: Picking non-superwash wool uses fewer chemicals and less energy, so it is better for the earth.

Sustainable Alternatives

You have better choices if you want to help the planet. Some yarn makers now use new ways that skip harsh chemicals. These ways use natural enzymes, plasma, or ozone to treat wool. They do not need chlorine or plastic layers.

  • Enzyme treatments use natural proteins to change the wool’s surface. This makes wool machine-washable without bad chemicals.

  • Plasma and ozone treatments use air and power to smooth the wool. These ways make little or no waste.

  • Some mills now sell chlorine-free superwash wool. These yarns use safer ways and follow strict green rules.

The Naturetexx Plasma Process is one example. It uses green energy and does not use chemicals. It has labels like GOTS and OEKO-TEX, which show it meets high safety and green rules.

Treatment Type

Felting Resistance

Impact on Wool Feel

Environmental Impact

Enzyme Treatment

Good

Keeps softness

Eco-friendly, less waste

Plasma/Ozone Process

Good

Keeps softness

No chemicals, low pollution

Traditional Superwash

Excellent

Soft, but less natural

Chemical waste, microplastics

Tip: Look for yarns with GOTS or bluesign labels. These show the yarn was made with safer, greener ways.

Caring for Superwash Wool

Caring for Superwash Wool
Image Source: pexels

Washing Tips

You want your superwash wool garments to last and look great. Knowing how to wash wool the right way helps you keep your clothes soft and bright. Superwash wool makes laundry simple because you can use the washing machine. Still, you need to follow a few steps to protect the fibers and get the best results.

Here is a step-by-step guide for how to wash wool that is superwash:

  1. Choose a gentle detergent made for wool. Do not use bleach or fabric softeners.

  2. Set your washing machine to the gentle or delicate cycle. Use cold water to prevent damage.

  3. Place your superwash items in a mesh laundry bag. This keeps them from tangling or stretching.

  4. Add the right amount of wool wash detergent.

  5. Start the washing machine and let the cycle finish.

You can also check this table for quick tips:

Aspect

Recommendation

Washing Temperature

Cold or warm water; never use hot water

Detergents

Wool-specific, gentle detergents like Eucalan or Soak

Washing Method

Gentle cycle in the washing machine; use mesh bags

Drying

Tumble dry low or lay flat to finish drying

Avoid

Bleach, fabric softeners, high heat

Superwash wool resists felting and shrinking, but you still need to handle it with care. Too much heat or rough washing can stretch or damage the fibers. Air drying is best if you have time. If you use the dryer, check often and use the lowest heat.

Tip: Following these steps helps your superwash wool keep its shape and color, even after many washes.

Choosing Wool

When you shop for wool, you have many choices. Superwash wool is easy to care for and works well for busy people. You can use the washing machine, so it is perfect for socks, baby clothes, and sweaters you wash often. The easy care label means you spend less time worrying about laundry.

Think about these points when you choose between superwash and non-superwash wool:

  • Superwash wool gives you bright colors and a smooth feel. It is easy to care for and keeps looking new after many washes.

  • Non-superwash wool feels more natural and keeps you warmer. It holds its shape better and is great for projects that need structure.

  • Superwash wool may stretch more and lose some shape over time. Non-superwash wool keeps its memory and bounce.

  • If you care about the environment, look for superwash yarns made with newer, greener methods.

Always read the label before you buy. Labels tell you if the yarn is superwash, how to wash wool, and if you can use the washing machine. This helps you pick the right yarn for your project and your lifestyle.

Note: Yarn labels show fiber content and care instructions. This helps you know if your wool is easy to care for and if it fits your needs.

Now you know superwash wool goes through a special treatment. This treatment takes away or covers the scales on the fibers. Because of this, you can wash it in a machine and it will not felt as easily. Here are some important things to remember:

Pick the wool that works best for you. Check the labels, follow the washing tips, and try to find a good mix of easy care and helping the environment.

FAQ

What makes superwash wool different from regular wool?

You will notice that superwash wool goes through a special superwash process. This process removes or covers the scales on the fibers. Because of this, you get machine washability and easy care. Regular wool can felt or shrink if you use a washing machine.

Can I use hot water to wash superwash wool?

You should avoid hot water. Always use cold or warm water when you wash superwash wool. Hot water can damage the fibers and affect the washability of wool. For best results, follow the care instructions on the label.

Does superwash wool lose its properties over time?

Superwash wool keeps its shrink-proofing and machine washability for many washes. Over time, you may see some stretching or loss of shape. You can help your garments last longer by following proper care tips and learning how to wash wool correctly.

Is superwash wool easy to care for?

Yes! Superwash wool is easy to care for. You can use the washing machine and do not need to hand wash. This makes superwash yarns a great choice for busy people who want easy care and bright colors.

What are the main uses for superwash yarns?

You will find superwash yarns in socks, baby clothes, and sweaters. These items need frequent washing. The superwash process gives you easy care and machine washability. You get bright colors and soft texture, making these yarns perfect for everyday wear.

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