Blue line indicator diapers

Blue line indicator diapers DEFAULT

Choosing the best nappies for your baby


A good nappy keeps wetness away from baby's skin, helping to protect against irritation, rashes and chafing.

Softness and Stretch

A soft surface and stretchy sides gently protect baby's delicate skin and comfortably adjust to their shape.

A Wetness Indicator

A line on the nappy that turns from yellow to blue letting you know when it may be time for a change.

Shaped for Newborns

A cut-out on the front of the nappy that goes around the umbilical stump, keeping it dry and exposed to air to help it heal, called a navel friendly shape!.

Mum tips

  • Newborns will need on average 7-8 nappies a day.

  • After the first few weeks, your baby may need only 5-6 nappies per day.

  • This might seem like a lot of nappies, but there are ways you can save money and get rewarded for buying the essentials your baby needs.

  • Remember that newborns grow quickly and may only be in the smallest size for a few weeks.

  • No matter which Pampers nappy you buy, you can collect fun and useful rewards by downloading the Pampers Club app and scanning your receipts


Pampers Blue Line: How Do Wetness Indicators Work?

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As you approach parenthood (whether it is your first time or not), there are lots of things that you need to learn and master. Feeding, burping, bathing, and then there’s the diaper change!

As a mom, it seems to become a normal part of the job when you casually sniff or feel your baby’s butt from time to time, but if you have been there you will know that this isn’t a wise thing to do, especially if you get caught out. 

Now there is something that is on the market that could be a game-changer for us all- wetness indicators like Pampers blue line: How do wetness indicators work?

Table of Contents

What Is A Wetness Indicator?

The wetness indicator is usually a yellow line that runs along the outside of the diaper and alerts the parent that the diaper is wet by changing to a blue color. This is a sign that the diaper is at the maximum absorbent capacity and a change is needed.

So, what is the chemistry behind this magical invention?

The wetness indicators are a chemical called Bromophenol Blue. Once a liquid comes into contact with it whether it is acidic or alkali it will change from its usual color, from yellow to blue.

Babies’ urine tends to be slightly alkali making this a very effective hack for parents, taking all the guesswork out of diaper changes.

What Diapers Offer The Wetness Indicator?

There are many brands that have cottoned on to the effectiveness of the wetness indicator and that it is a feature that us parents actually like. We are going to put Pampers Blue line diapers under the microscope and truly look at whether they are as effective as they sound.

Why Pampers?

Pampers diapers have been around for years so it is only natural to believe that during that time they have learned and made their product one of the most popular and leading brands amongst us moms.

They boast to have the most durable and softest material to protect your baby’s most sensitive areas, this barrier protects their skin from nappy rash and irritation. 

This is only one of the many features of Pampers diapers and of course, they have the magical wetness indicator we spoke about, they have extra elasticity so you have no sneaky leaks or poop explosion emergencies. If that is not enough they also hold the horrid smell of poop and urine without stinking out the room! 

Pampers diapers are known for being hypoallergenic meaning that they are safe to use on your baby’s delicate skin. They will not cause diaper rash or skin irritation and this is an important feature for parents.

Pampers are well known for their hypoallergenic qualities. As parents, we often worry about the things our baby can and cannot eat, what laundry detergent to use but now you can use a diaper without worry! 

Are Pampers The Best Diapers Around?

As with anything in parenthood, there are always brands that compete with each other. Some may have features that others do not, some may be cheaper but when it comes down to diapers what are the real telltale signs that show us Pampers are the best?

Many brands have been around for years each one making their product the ‘best’ around but if we look closely we can see that there may be clear differences that make us choose Pampers over any other.

  • Pampers tend to be better for younger babies, with good fitting technology this may be your go-to diaper to prevent any little leaks.
  • Pampers use materials that are known to be softer on a baby’s skin which may be your deal-breaker.
  • On the other hand, Pampers are slightly more expensive than the other leading brand but you get what you pay for right?
  • The tabs on Pampers are a part of the design so one pull makes this diaper easier and fits more securely. 
  • When choosing a diaper many of us are attracted by the cute design and characters they may have but the underlining factor here has to be absorbency! Pampers are known to win hands down in this area.
  • They have a hypoallergenic breathable lining with compounds that pull the wetness away from your baby’s skin allowing them to stay dry and protected. Combine this with the wetness indicator and it seems you may have found your preferred diaper!

Other Brands That Feature A Wetness Indicator

Pampers is not the only brand that features a wetness indicator, there are many others available too. Brands such as:

Mother changing babys diaper


Does blue line mean wet diaper?

Pampers has a vertical blue line that shows outside the diaper. Whenever your baby wets themselves, the line will change color. This blue line is referred to as the wetness indicator.

Does Pampers Baby Dry have wetness indicators?

All sizes of Pampers Baby Dry and Swaddlers have wetness indicators. The Baby Dry model did use to only have the indicator on sizes newborn, 1, and 2. But now it is a feature found on all sizes.

What color do diapers change when wet?

This varies across different brands. For example, Pampers Swaddlers wetness indicator changes from yellow to blue/green when wet. Huggies wetness indicator changes from yellow to bright blue when wet.

What does the yellow vertical line on a diaper mean?

The yellow line that you can see on the outside of a diaper is in fact the wetness indicator. This then changes to different colors indicating that the diaper is wet and needs to be changed. The color change varies from brand to brand.

Pampers wetness indicator not working

Occasionally the wetness indicator on your Pampers diaper does not change color as it should, even though your baby has wet their diaper. This can happen for a few different reasons:

  • Your baby may not have peed enough to turn the yellow line to blue.
  • The indicator can dry out on hot days and go back to yellow.
  • If the pee does not hit the front of the diaper directly, the line may not change at all. This is very common with male babies.

The Final Thought

Now as a mom myself I am aware that there are so many brands boasting that they are the best, and most of them come with a wetness indicator nowadays. But there is no invention that can replace your common sense!

Many times I have switched brands and found with them all that when my daughter clearly needed a diaper change and the wetness indicator was hardly blue at all. This can usually happen because if the indicator does not have direct moisture, the chemical will not turn blue!

I also found that even when the indicator was blue the nappy didn’t feel that wet, in this case, I waited a little longer until I was sure a diaper change was necessary. 

It is daunting becoming a parent whether it is for the first time or not.

You just need to remember that regardless of whether the wetness indicator has turned blue or not, it still is your choice whether you change the diaper, it is only an indicator of moisture after all! 

If you would like to compare some other brands of diapers such as Kirkland vs Huggies or Luvs vs Pampers check out our other reviews.

Emma Davies

Hi, I'm Emma and I'm a mother to 5 beautiful children aged from 1 to 21 years old- life is hectic! I have learned so much along the way, not only from my own children but also through my professional life. In my positions as a Childminder and Teaching Assistant, I have studied Child Development and The Early Years Developing Practice. I wish to share all of this knowledge and help you with your own parenting journey!

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Pampers blue line indicator question

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This is probably a really dumb question but does the blue line only turn blue for pee or for both pee and poo? My daughter just had a well soiled diaper but the line was only a little blue. Wondering if I should take that to mean she also peed.

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Wetness indicator

A wetness indicator is a common feature in many disposable diapers and toilet training pants. It is a feature that reacts to exposure of liquid as a way to discourage the wearer to urinate in the training pants, or as an indicator for parents that a diaper needs changing.[1][2]


  • "Fade when wet" is a feature in most training pants that has small graphics which fade as a reaction to liquid, specifically urine.[3]
Wet vs Dry.jpg
  • "Feel wet" is a feature used in some training pants that lets the wearer know when they are wet by feeling. Nowadays few training pants use this feature.
  • "Color Change When Wet" is a feature in most modern baby and adult diapers that has a yellow stripe or graphics that goes from the front to the back of the diaper that which turns blue after a minute or two as a reaction of liquid, during the transition when the indicator is activated the indicator fades or turns an amber color before turning blue, over time the indicator becomes less yellow and more blue as the diaper gets used more often to let the wearer or the caregiver know when the diaper needs to be changed.


In 1978, Kimberly-Clark introduced Kleenex Super Dry diapers with "wetness indicators" in the form of a design that fades and lightens as the inside of the diaper becomes wetter.[4][5] (The Kleenex Super Dry line was later superseded by Kimberley-Clark's higher-end "Huggies" line.[6][7])

In 2000, Huggies introduced and started integrating their new "Learning Designs" feature into all Huggies Pull-Ups training pants. These were small designs on the Pull-Up that use a special ink that fades when exposed to wetness, with an intent to let the wearer know when the wearer is wet or dry and as an incentive for urinating in the toilet instead of in the Pull-Up.[8] But on March 2nd, 2005, the original Huggies Pull-Ups are now known as Learning Designs. Learning Designs Pull-Ups also have a small star picture on the inside that is digested on, that is also printed on certain ink that evaporates when exposed to feces.[9]

In 2002, Pampers introduced Easy Ups trainers, which adopted the Learning Designs technique from Huggies Pull-Ups.

In 2004, Pampers introduced Feel 'N Learn trainers, which not only used the Learning Designs, but also added a wetness liner that lets the wearer know when they are wet by feeling.

In 2005, Huggies released Pull-Ups Training Pants with Wetness Liner, similar to Pampers Feel 'N Learn.



Line indicator diapers blue

Ultimate Baby Guides

Pampers blueline is a vertical blue line that shows outside of your baby’s diaper. Whenever your baby wets him or herself, the Pampers changes color. The blue line that shows is referred to as a wetness indicator. A wetness indicator is a regular feature in most diapers that helps to show if the diaper has been exposed to liquid through urine thereby telling the parent that the child needs another diaper.

There are many types of wetness indicator, but one of the most unique types is the one with a change of color when it is wet. Such diapers come with a yellow feature that extends from the front to the back which changes to blue after it must have been exposed to moisture. Pampers blue line has awesome characteristics that perform the task of alerting parents when it’s time to change the diaper.

It is common knowledge that having a baby comes with increased responsibilities, most especially in the area of your child’s natural way of passing out substances from his body. The urine or poo of a newborn baby can create a very unique mess that might be difficult to take care of. This is why the Pampers baby nappy and diapers come with a feature that helps you as a parent to know when it’s time to change your baby’s nappy.

Why You Should Get A Pampers Diaper

It is a known fact that there are many kinds and models of baby diapers in the market. But the most popular and perhaps the most unique is the Pampers baby diaper. The Pampers baby diaper happens to be the most sought after diaper by most parents all over the world. The reasons are not far-fetched.

With its durable material, its softness on the tender skin of your baby as well as its ability to hold on to baby poo and urine without exposing its putrid smell makes pampers baby diaper stands out among the exhaustive list of other diaper models that you can find around. These and many more make the Pampers baby diaper the nappy of first choice for most parents.

However the major benefits of using pampers baby diapers are as follows

  1. It is very convenient to use. As a disposable diaper, pampers come with a soft material that gives a whole lot of convenience to your baby whether he is eating, sleeping, or playing.
  2. It can be disposed of with ease when compared to other kinds of baby diapers.
  3. It is hypoallergenic. This makes your baby immune from whatever skin or chemical reactions that they may be prone to.
  4. It comes with a wetness indicator which helps to indicate whenever your baby has messed up him or herself either through urine or moist poo. The Pampers blue line will replace the normal yellow line when it’s time to change the diaper.
  5. The blue color that shows will immediately tell you as the parent that it’s time to change and dispose of your baby’s diaper. Once you notice the blue line, you have to change the diaper to protect your baby’s sensitive skin from diaper rash.

How does the pampers blue line work?

The Pampers baby diaper comes with various substances that help it to do its work well. Some of these substances include chemical elements as well as absorbers, fire control gels, floral gels, etc. these substances all work together to ensure maximum comfort for your baby.

Whether your baby urinates or poo, it cannot leak out simply because of the chemical substance that your Pampers is made of help to resist the pressure that forces water out of the polymer.

When you purchase a Pampers baby diaper, you will see a yellow line that extends to the other side of the diaper. When you put it on your baby, the yellow line remains for as long as your baby has not urinated on himself. When your baby urinates on himself, the yellow line in the diaper becomes a Pampers blue line which is an indicator to you that it’s time to get a new diaper for your baby.

At times, the diaper may seem big and heavy. This is another way to know that it is time to change your baby’s diaper. This is as a result of the weight of the content that your baby has excreted.  Since your baby cannot speak or say much at that tender age, the blue line in the Pampers baby diaper speaks for your baby by telling you that the diaper needs to be changed.

It is very necessary and important for you to change the diaper immediately you notice the change in color of your baby’s diaper from yellow to blue. This is to avoid complications and skin rashes that may result from whatever he or she may have excreted.

Benefits Of The Pampers Baby Diaper Blue Line

Having understood the way the blue line in your baby’s Pampers diaper works, it is very important to peruse the various benefits that come along with the blue line in your baby’s diaper. Since we are well aware that the major importance of the blue line in the Pampers baby diaper is the fact that it tells you when you need to change your baby’s diaper. Some of its other advantages include the following:

Advantages of Pampers blue line

  • It ensures that your baby’s tender skin remains soft and dry. This is simply as a result of the fact that you will know as soon as your baby messes himself, ensuring that you are able to change the diaper on time to prevent skin problems.
  • It prevents over desiccation and unnecessary outflow of either urine or baby poo from your baby by sending a message to you immediately your child must have excreted such substances, giving you enough time to attend to it thereby stopping it from pouring out under whatever guise.
  • It helps you to avoid the embarrassment that comes with the putrid smell that is associated with a baby’s urine or excreta by allowing you to change the diaper and wash it off from your baby’s body immediately you notice it.

Below is the list of diapers that change when wet.

15 Diapers that change color when wet

  1. Pampers swaddlers
  2. Pampers baby dry
  3. Pampers pure protection
  4. Pampers cruisers
  5. Huggies little movers
  6. Huggies little snugglers
  7. Huggies snug & dry baby diapers
  8. Huggies special delivery
  9. Huggies overnight
  10. Bamboo nature
  11. Mama bear gentle touch
  12. Ditto baby diapers
  13. The Honest company diapers
  14. LUVS Ultra leakguards disposable baby diapers
  15. Seventh generation baby diapers

FAQs for Diaper wetness indicators

What color do diapers change when wet?

Different diapers have different wetness indicator colors. For example, Pampers swaddlers wetness indicator changes from yellow to blue /green when wet. Huggies wetness indicator change from yellow to bright blue when wet.

What does the yellow line on a diaper mean?

The yellow line on a diaper means a wetness indicator. It changes to different colors depending on the brand. For instance, Huggies baby diapers change from yellow to bright blue when wet.

How to know if Pampers is full

To know if your baby’s pampers diaper is full, the diaper bulges and becomes squishy when touched. The diaper also feels heavy and swollen up.

What color do pampers turn when wet?

Pampers turn from yellow color to blue color when wet.

What are the Pampers with wetness indicators?

Pampers with wetness indicator includes Pampers swaddlers, Pampers baby dry, Pampers pure protection, and Pampers cruisers.

Pampers wetness indicator not working
Sometimes you will discover that the pampers wetness indicator does not change in color when your baby pee. This can happen for few reasons such as:

a. The pee is not enough to turn the yellow line to blue
b. The indicator can dry out on hot days and go back to yellow.
c. If the pee does not hit directly in the front of the diaper, the line may not change. This is common with baby boys.

When the indicator does not work, use your nose, touch and feel the diaper and see if it is full and heavy.


In summary, the Pampers blue line in the Pampers baby diaper serves as a notification for you to change the diaper immediately it becomes wet. This guide helps you to know how the blue line in your baby pampers can assist you in the day-to-day care of your developing toddler.     

Bromophenol blue as wetness indicator in Diapers by

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