
ASTM washing symbols are a crucial part of understanding how to care for your clothes, and they're actually pretty easy to decipher once you know what they mean.
The symbols are standardized by the American Society for Testing and Materials (ASTM), which ensures that they're consistent across the industry. This means you can trust that the symbols on the label will give you accurate information about how to wash and care for your clothes.
For example, the "W" symbol indicates that the item can be washed in a machine. This is great news if you're short on time or prefer to do laundry in bulk.
Some fabrics, like wool and silk, may have special care instructions that go beyond just washing. For instance, wool items may require hand washing or a specific washing temperature to prevent shrinkage.
A fresh viewpoint: Clothes Washing Instructions
Understanding Laundry Symbols
The first thing to know about laundry symbols is that there are five basic elements: washing, bleaching, drying, ironing, and professional cleaning. These elements are always in the same order.
Each symbol on a care label states the maximum acceptable care, so gentler handling is always welcome. If a label says wash warm, you can wash it in cool water, but not in hot.
The ironing symbols are easy to recognize: a circle for high temperature, a square for medium temperature, and a triangle for low temperature. These symbols are recommended temperatures for different types of textiles.
The temperature of a treatment can also be defined by a series of dots. For example, 95° C is near boil, while 30° C is cool.
Here are the ironing symbols and their recommended temperatures:
The drying symbols are also important to understand. A circle in a square means you can tumble dry, while a crossed-out circle means you can't. Some symbols, like line dry and drip dry, are specific to North America, while others, like dry flat, are more universal.
For example, line dry means hang to dry on a line, while drip dry means hang to dry on a line and may be dried in the sun.
For another approach, see: Dry Cleaning Symbols Chart
Laundry Instructions
Laundry Instructions can be a bit confusing, but understanding the symbols can make a big difference. The five elements of laundry care are: washing, bleaching, drying, ironing, and professional cleaning, and their order makes sense.
The symbols on care labels are not always intuitive, but at least their order is consistent. The iron pictogram is one of the most straightforward symbols, with one to three dots indicating the maximum heat.
Here are some key things to keep in mind when it comes to laundry instructions:
- Washing instructions should include a method of washing and a method of drying.
- Do not use chlorine bleach, and it's unclear whether peroxide bleach is acceptable.
- Some items may require hand washing or professional cleaning, while others can be machine washed and dried.
- Ironing instructions may include temperature guidelines, such as iron low (230°F or 110°C) or iron high (390°F or 200°C).
By understanding the symbols and instructions on care labels, you can take better care of your clothes and extend their lifespan.
5 Elements of Laundry
The order of care instructions is actually quite straightforward: washing, bleaching, drying, ironing, and professional cleaning. You'll often see these elements represented by pictograms on clothing labels, but they can be a bit tricky to decipher at first.
The pictograms are meant to convey the maximum acceptable care level for a garment. If a label says "wash warm", you can definitely wash it in cool water, but not in hot.

Each element represents a specific level of care, from gentle washing to professional cleaning. The good news is that gentler handling is always welcome, so feel free to choose a lower level of care if you're unsure.
Here are the 5 elements in order:
Just because a label says bleaching is allowed doesn't mean you have to do it. And always remember, gentler handling is always the best approach.
Instructions
The care label on your clothes is more than just a piece of paper - it's a guide to keeping them looking their best. The FTC recommends providing washing instructions because consumers prefer it.
A care label should include a method of washing and a method of drying at a minimum. The order of care instructions is not specified in the care labelling rule, but it's provided in ASTM D5489-96c for care symbols.
Washing instructions can be broken down into several steps: washing, bleaching, drying, ironing, and dry-cleaning. The bleaching symbol tells you what sort of bleach may be used - peroxide or chlorine.
If you see a symbol with a solid triangle crossed out, it means you should not use chlorine bleach. The drying symbol can indicate whether an item can be machine dried or if it needs to be air-dried.
Here are some common drying symbols and their meanings:
Remember, it's always better to err on the side of caution when it comes to laundry instructions. If you're unsure, it's best to check the care label or consult the manufacturer's guidelines.
Special Care Labels
Some care labels give you specific instructions on how to handle certain fabrics. Never use chlorine bleach on wool, silk, and polyamide – it causes irreversible damage to these materials.
If you see a solid triangle crossed out on a care label, it means you shouldn't use any bleach at all. This symbol is often used in North America.
You'll also see symbols that indicate how to dry your clothes. A crossed-out circle means you shouldn't machine dry the item.
You might like: What Happens When You Wash Dry Clean Only
Label Requirements
Label Requirements can be complex, but Cotecna Inspection can guide you through it. They provide care label testing services according to various countries' requirements.
Cotecna Inspection helps apparel companies properly label care labels. This ensures consumers and clothing caregivers can better understand the care instructions.
Proper labeling is crucial for consumers to care for their clothing correctly. Cotecna Inspection can provide the necessary guidance to ensure compliance with country-specific requirements.
Label testing services are available to ensure that care labels meet the necessary standards. This includes testing according to the requirements of various countries.
Ironing Labels
Ironing symbols on care labels are the most intuitive. They can be enhanced with one to three dots, indicating the maximum heat, as well as symbols depicting the use of steam.
For items that require low-temperature ironing, it's a good idea to press from the back or through a cloth to avoid leaving shiny patches. The temperature should not exceed 230°F (110°C).
Ironing through a damp cloth without exerting extra pressure is recommended for medium-temperature ironing. The temperature should not exceed 300°F (150°).
Delicate garments should be ironed from the back or through a cloth, especially when ironing at high temperatures. The temperature should not exceed 390°F (200°C).
Additional reading: Dish Washing Machine Temperature
When to Use 'Dry-Clean Only'?
So you're wondering when to use "Dry-Clean Only"? It's actually quite simple: this label can be used when the garment can be safely dry cleaned by the normal process, using any dry cleaning solvent.
The key here is that the garment can't be safely washed, so it's not just about dry cleaning being the preferred method, but also about the garment's inability to withstand washing.
In fact, when "Dry clean only" is used, there must be a reasonable basis for both the dry cleaning instruction and the warning against washing.
This means that the manufacturer has tested the garment and determined that dry cleaning is the safest option, and that washing could potentially damage the fabric.
If you're unsure about how to care for a garment with a "Dry-Clean Only" label, it's always best to err on the side of caution and follow the manufacturer's instructions.
Additional reading: When Were Washing Machines Invented
Label Testing and Compliance
Label testing is a crucial step in ensuring that care labels on clothing accurately convey washing instructions. Cotecna Inspection provides care label testing services according to various country requirements.
Proper labeling is essential for consumers and clothing caregivers to understand how to care for their clothes. Cotecna Inspection guides apparel companies in various countries to properly label care labels.
Care labels must be accurate to prevent damage to clothing and ensure consumer safety. Cotecna Inspection can verify that care labels meet the requirements of various countries.
Label testing helps apparel companies avoid costly mistakes and reputational damage. Cotecna Inspection provides care label testing services to ensure compliance with country-specific regulations.
Accurate care labels are essential for maintaining the quality and longevity of clothing. Cotecna Inspection can help apparel companies ensure that their care labels are accurate and compliant.
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