Why Should Some Stains Be Washed In Cold Water, And Others In Hot Water?

Choosing hot water or cold water to remove a pesky stain depends on the type of fabric and the type of staining substance, but generally speaking, cold water is always a safe approach that won’t make the problem any worse!

Imagine you’re getting ready for a first date; you’re showered and coiffed, your shirt is ironed and your shoes are shined. To soothe your nerves, you’ve started your evening with a glass of red wine. Looking at the clock, you realize it’s almost time to leave, so you hurriedly raise your glass to down the rest of your merlot. Unfortunately, a stream of red wine slips out of the glass and lands squarely in the middle of your outfit! Panic sets in, and you try to remember everything your mother ever taught you about stains, but nothing comes to mind.

Hot water or cold water? Am I supposed to use vinegar or club soda? Dab, don’t rub, right? What material is this shirt made of anyways? Obviously, knowing how to effectively get stains out of your clothes and surfaces is important!

What is a Stain?

While we all know what a stain may look like, it is harder to describe what they are. A stain is a discoloration or mark that can be clearly seen on another surface or material. These stains are caused by the chemical and physical interactions of two different materials. Most stains come in two types: oil-based and water-based.

Dirty sauce stain on fabric from accident in daily life(Fecundap stock)s

Stains can generally be classified into two categories: oil-based and water-based. (Photo Credit : Fecundap stock/Shutterstock)

A water-based stain is one that comes from beverages and most liquids, drips from cutting fruit, and any other substance that is primarily composed of water. An oily stain is one from gravies, vinaigrettes, grease or oil spatters, substances that have a low concentration of water. There are some stains—such as those from ink, wine, chocolate, lipstick or paint—that will require a combination of approaches and may be more difficult to remove, particularly if they have a specific color.

Just as there are different types of stains, the temperature of the water with which you clean such stains will also differ, as will the substance you use. For example, you don’t want to use water on an oil-based stain, as it can make the situation worse, and you also want to be careful how/when you use the classic “club soda” solution. Oil-based stains often require dry cleaning to fully remove the marks, but if you are going to wash out a stain at home, the most important consideration is the temperature of the water you use!

Hot Water for Stains

If you stain something white or pale in color, or if an item is heavily soiled, then hot water is the way to go. For example, diapers and underwear should always be washed in hot water, due to their color and their high need for sanitizing, which hot water provides. Hot water is very effective at removing stains because it activates laundry detergent better than cold water, and also fully dissolves powdered detergents, making them more efficient. As mentioned above, oil-based stains often need to be brought in for dry cleaning, but if you want to wash them at home, always use hot water. Hot water is also good for stains with color, a la chocolate or red wine.

The problem with using hot water on colored clothing is that it can increase the likelihood of color bleeding or fading. Furthermore, hot water can make clothes more prone to shrinking, particularly if the item is wool or any other delicate material.

Warm water (90-110 F) may not offer the same level of sanitizing as hot water (130 F), but it is typically adequate for common articles of clothing, such as jeans and clothes of manmade fabrics. The advantage of warm water is that it can get your clothes clean without the threat of shrinking or bleeding colors.

Cold Water for Stains

Cold water can be used on any type of stain, to varying effect, but there are some items of stained clothing and fabrics that should only be washed in cold water. To begin with, any stain on a delicate item of clothing, such as something made from wool, silk, satin or hand-dyed fabric, should be removed with cold water (90 F or below).

Smooth elegant golden silk can use as wedding background(Morozova Oxana)1

Any stain on a delicate item of clothing, such as silk, should be removed with cold water (90 F or bel (Photo Credit : Morozova Oxana/Shutterstock)

Additionally, if a stain is protein-based—namely blood, egg, milk (dairy products), deodorant, glue—it should be removed with cold water. If you use hot water, you could effectively “cook” the proteins, binding them even further to the fabrics and making them nearly impossible to get out.

Some of the other stains that should be attacked with cold water include:

  • Jelly/Jam
  • Coffee/Tea
  • Soy Sauce
  • Urine
  • Baby food
  • Paint

If you aren’t sure about what temperature of water to use, it is always best to use cold water, as there is little chance of any damage to the garment. While this isn’t recommended if you want to sanitize your clothes thoroughly, it will reduce your energy bill, wear out your clothes slower, and prevent any shrinking or distortion that may make your clothes unwearable!

A Final Word

There will always be traditional remedies for getting stains out of clothes, from club soda and vinegar to lemon juice and hydrogen peroxide, but if you can’t remember all the tips and tricks, you should at least know whether to use hot or cold water! For delicate items, those stained with proteins, and any new clothes you want to prevent from shrinking or bleeding, use cold water. For intense stains that require sanitizing, or if you’re washing white/light clothes composed of manmade fabrics, hot water will be your best bet!

References

  1. American Chemical Society
  2. Canadian Society of Forensic Science Journal
  3. International Conference Journal
  4. Engineering Apparel Fabrics and Garments By J Fan, L Hunter
  5. University of Minnesota Twin Cities
The short URL of the present article is: http://sciabc.us/6bWlI
Help us make this article better

John Staughton is a traveling writer, editor, publisher and photographer who earned his English and Integrative Biology degrees from the University of Illinois. He is the co-founder of a literary journal, Sheriff Nottingham, and the Content Director for Stain’d Arts, an arts nonprofit based in Denver. On a perpetual journey towards the idea of home, he uses words to educate, inspire, uplift and evolve.

.
Science ABC YouTube Videos

  1. What Does It Take To Make Vaccines?What Does It Take To Make Vaccines?
  2. Are Zebras Black with White Stripes or White with Black Stripes?Are Zebras Black with White Stripes or White with Black Stripes?
  3. What Are Asteroids And Where Do They Come From?What Are Asteroids And Where Do They Come From?
  4. Why Do We Find Babies Cute?Why Do We Find Babies Cute?
  5. How Hurricanes Form? Why Hurricanes Spin AntiClockwise in North and Clockwise in Southern HemisphereHow Hurricanes Form? Why Hurricanes Spin AntiClockwise in North and Clockwise in Southern Hemisphere
  6. Why Is It Called "Dead" Sea? Why Does Everyone Float In This Sea?Why Is It Called "Dead" Sea? Why Does Everyone Float In This Sea?
  7. How to live without a heart or a brain - Lessons from a JellyfishHow to live without a heart or a brain - Lessons from a Jellyfish
  8. How Do Sunflowers Face The Sun?How Do Sunflowers Face The Sun?