My name is Emily, I have been blogging since 2009. I found the curly girl method in 2018, which helped me to discover my naturally wavy hair. Since then, I’ve continued to wear my hair wavy, reading and watching tons about wavy hair. This blog is where I share what I’ve learned, in hopes of helping others. More about me and my backstory can be found on my about page.

This is just one misconception about the curly girl method. The internet seems to get quite a bit wrong about the curly girl method. If you’re interested in learning more about the ‘real’ curly girl method, check out my post: The real curly girl method is different from what the internet taught me.

Short hair (or haircut with short layers) routine for naturally wavy hair (to learn how I have adapted to styling this haircut!)

In other words, diffusing your hair dry may help hold your hair in the texture it has while wet, but it doesn’t create that pattern out of thin air. That’s your texture, it’s just being preserved better by drying your hair faster than air drying.

The book is very against using heat, she even says that a single use of heat tools like a blow dryer or a flat iron can cause permanent damage to hair…yet she recommends diffusing. So, I think that speaks somewhat to how it is quite safe.

By recognizing that FOV requirements can be highly variable, we are able to better serve the needs of our customers and offer a broad range of camera FOV options.

The field of view of the camera determines how much of your sample you can see. With larger FOVs, cameras can image more effectively and capture a sample in fewer images. However, FOV is decreased at higher magnifications and in order to improve speed, and it should be matched to the model of microscope. By keeping this in mind, you can maximize your FOV and perform more efficient imaging.

It does make a difference in results, at least somewhat. The main reason why people recommend diffusing to 90 or 95% dry instead of until completely dry is diffusing until your hair is totally dry usually introduces a lot of frizz vs diffusing until very close to dry. That’s just one example of how it matters how long you diffuse, though.

Yet, I’ve still been asked all sorts of other questions about diffusing! I realized I had even more to share with you guys about diffusing. I decided that I’d basically just do a Q and A style blog post covering different diffusing related questions that I’ve received.

To try to exclusively look at the impact of diffusing time, I used the same shampoo and conditioner products, tried to use the same amount of each, used the same techniques in the shower and after the shower, used the same gel, in the same amount, and applied it the same way. My goal was to use all the same techniques on both of these wash days except for the diffusing time.

I think this is because my curls were looser, so they were a bit puffier. I know that in the past when I have diffused until almost completely dry it resulted in more volume due to the increased shrinkage. In fact, this impact is what I try to avoid by diffusing less now than I used to.

See the photo below for an example of how diffusing until fully dry makes my current haircut get REALLY voluminous, haha.

Diffusers don’t have the ability to change your hair texture in any meaningful way. Diffusers are just attachments that take the air that comes out of your blow dryer and spreads it (diffuses it) across a wider area.

She likes to recommend hover diffusing, and she says using high heat is safe in that case. If the diffuser isn’t directly contacting your hair, the heat won’t transfer as much as it can if they are in direct contact.

The top row of the collage below is the day I diffused for  6 minutes. The bottom row is photos from the day that I diffused for 30 minutes.

The area across which your camera can image is known as the field of view or FOV, the larger the FOV the more of your sample you can see. Having a large FOV allows you to take more efficient images containing more data, and take fewer images in order to capture the entire sample. But as with all camera specifications, changes to FOV will affect other vital factors such as resolution and imaging speed.

I used to diffuse until almost dry, to maximize volume and the tightness of my waves. Now, I only diffuse for a little while so that my hair isn’t as tight, so that the sides don’t “poof up” too short.

You can diffuse your hair while following the curly girl method. In Curly Girl The Handbook by By Lorraine Massey (who is credited for creating the curly girl method) she even recommends that diffusing for people with wavy hair!

Adaptors can also affect the microscope and camera FOV depending on the type of adaptor used. A C-mount adaptor is the most popular microscope camera adaptor and is restricted to a maximum 22 mm FOV. The F-mount adaptor is a larger format adaptor capable of reaching >30 mm FOV.

For example, if you have 2C hair then using techniques to get ‘looser waves’ may put you more at a 2B, where if someone who regularly has 2B hair uses a technique to get ‘looser waves’ they’ll get more of a 2A. As this post said earlier, diffusing doesn’t create waves. I just mean looser or tighter than your norm.

The camera FOV depends on two factors: the size of the camera sensor and the total magnification. Sensor size can be measured in a number of ways but a commonly used measure is the size of the diagonal across a sensor, as some sensors are square and others rectangular. This is typically displayed in millimeters, and a range of camera sensor sizes can be seen in Figure 1.

I have two blog posts that cover diffusing wavy hair. There is my how to diffuse wavy hair tutorial that includes 4 different diffusing styles. Then there is my air drying vs diffusing wavy hair post that compares/contrasts those two options. I’ve also shared my for wavy hair, sharing which I felt were best.

Diffusers are unlikely to cause heat damage to your hair. Some damage may be possible if you use high heat and touch the diffuser directly to your hair, but diffusing is widely seen as far less damaging than blow-drying, using curling irons or blow dryers.

If your hair dries wavy when you diffuse, that’s because your hair texture when wet was already wavy, and the diffuser just helps dry your hair faster, so it doesn’t get straightened out by the weight of water being in your hair longer.

Pixiediffusing

The main reason why people ask this one, is they notice that their hair is wavier or curlier when they diffuse vs when they air dry. This is a common experience, but it’s not the result of the diffuser making your hair curly.

If you prefer your hair when it’s a bit looser than your norm, or if you don’t like your hair to curl at the roots, air drying for a while and then diffusing may help achieve the look you’re going for. I saw someone recently asking for how to achieve more of a Jason Momoa look, and I think air drying about half way and then diffusing may be a way to try to achieve that.

If I would have thought this out better, I wouldn’t have worn two pink v-neck shirts on each day! Oops. I didn’t wear the same shirt on both days they are just somewhat similar but I realize wearing a significantly different shirt would have made it clearer which photos are from which day.

As a result of this, I decided to run an experiment for you guys to help show how diffusing time does matter. I didn’t want to diffuse my hair until it was fully dry, as I knew that would result in my hair being too short. So I experimented with diffusing just a little bit (six minutes total) with diffusing until about half dry (30 minutes of diffusing).

The biggest difference is in the tightness of my curl pattern. It’s most visible on the curlier side of my head, which is the first photo in both rows. On the day where I diffused for 30 minutes, I got some spirals, while on the day where I diffused just 6 minutes, my hair was only S-waves.

How to diffuse wavy hair

If the goal is simply to attach the camera to the microscope, a 1x adaptor contains no additional lenses and provides no additional magnification or demagnification. This is often the preferred method as it introduces no additional lenses into the system. Every extra lens reduces the number of photons reaching the camera by 3-4% so many researchers will try to avoid this.

The ocular lens, or eyepiece, magnifies the image produced by the objective lens so it can be seen by the human eye.

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If you’re worried that your hair isn’t “really” wavy, you may benefit from checking out my post ‘Does the curly girl method turn straight hair wavy?”

Diffusinga situation

If your hair is only somewhat frizzy, this may just be the result of diffusing. It is normal for diffusing to introduce a little bit more frizz than air drying just because it is basically wind blowing on your hair. Using a lower speed may reduce the frizz level.

In other words, if your goal is to achieve the looser end of your curl pattern spectrum, air dry entirely or air dry and then diffuse. If your goal is to get results that are in the middle of the tightness your hair can achieve, diffusing part way and then air drying is the way to go. If you want to maximize your curl tightness then diffusing until 90 or 90% dry will help.

Defusing vsdiffusing

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The next thing I’d wonder is if you are diffusing until your hair is bone-dry. Many people find that if they diffuse to 95% dry and then let it finish air drying, that results in a lot less frizz.

Filed Under: Curly Girl Method, Wavy Hair Basics Tagged With: Can a Diffuser Make Straight Hair Wavy?, Can You Use A Diffuser While Following The Curly Girl Method?, Diffusing Wavy Hair, Do Diffusers Cause Heat Damage To Wavy Hair?, Does It Matter How Long You Diffuse Your Hair?, If I'm Going To Diffuse And Air Dry, Wavy Hair Before And After Diffusing, Which Should I Do First?, Why Does Diffusing Make My Hair A Mess In The Back?, Why Does Diffusing Make My Hair Frizzy?

Keep in mind that with all of these, they’re based on your curl range. What ‘looser waves’ or ‘tighter waves’ will be for you depends on your curl pattern.

If your hair is like mine and takes a long time to dry, you’ve probably wondered if it matters if you diffuse all the way, part way, or just a little bit!

Most likely, if you’re going to do a combination of air drying and diffusing, you’ll want to diffuse first. This is with the assumption that your reason for diffusing is to reduce your overall drying time.

A microscope C-mount or F-mount adaptor is needed to connect a scientific camera to the microscope camera port. The mount threading is standardized which means that a C-mount adaptor will connect to all scientific cameras that connect via C-mount. However, the adaptors are microscope specific which means that although any C-mount camera will connect to a C-mount adaptor, the adaptor will only fit microscopes of the matching brand.

I haven’t actually been asked this one, to be honest. However, I have often see people say something like ‘I let my hair air dry half way, then diffuse the rest’

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If you find that diffusing your hair makes your hair messy in the back, you’re likely leaning over rather than staying truly upside down while you diffuse. If you lean over, your hair will pull to the sides of your face ad sort of part down the center in back, and get stuck that way if it dries in that position.

For some reason, it’s often repeated online that the true curly girl method doesn’t allow people to use diffusers. This isn’t actually true. The true curly girl method is based on Lorraine Massey’s book and she recommends that “swavy” and wavy haired people diffuse!

Diffusingcurly hair

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[…] I have received a lot more questions about diffusing than I answered here, so I made a new blog post: Your questions about diffusing wavy hair answered. […]

Some rectangular camera sensors can often occupy the microscope FOV more effectively depending on the size, but if the camera FOV is larger than the microscope FOV there will be vignetting, an effect seen at the corners of the image due to the lack of light, as seen in Fig.3 Bot. While this may capture more of the microscope FOV, the substantial image artifacts at the corners of each image can lead to decreased image quality.

I wish I knew the exact video to link to, but I can’t seem to find it. I know that I’ve seen hair stylist and curly hair specialist Manes By Mell suggests only using the high heat setting while diffusing if you are not touching the diffuser to your hair.

Diffusinghair

If your reason for diffusing is more about your technique, then whether you air dry or diffuse first should depend on your style goal.

If your goal is instead to maximize volume, and/or keep your waves tighter, then diffusing first will help do that. I think of diffusing as helping to ‘lock in’ the shape my hair has when wet. So diffusing first helps start to lock in the curls before they have a chance to get weighed down as much.

Pixiediffusingvs hoverdiffusing

There are different techniques used for diffusing, but some of them, like pixie diffusing, involve putting your hair in the diffuser. This basically just helps hold/support your hair as it dries. It doesn’t change your hair texture.

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CMOS cameras offer much larger sensors, typically around 18.8 mm diagonal which matches up well to certain microscope models. Some microscopes can go above 20 mm diagonal, so CMOS cameras are also available with sensor sizes of 22 mm, 25 mm, and even 29 mm.

These larger sensors typically have more pixels, so while an EMCCD would have 0.25 megapixels (MP), CMOS cameras contain anywhere from 1-15 MP depending on the pixel size.

Similarly to resolution, FOV is dependent on both the microscope and the camera, both of which have upper limits on their max FOV. By pairing a large FOV camera with a large FOV microscope much of your sample can be captured at once, while using a smaller FOV camera with a large FOV microscope will limit the amount of data you can receive even if the microscope can deliver much more.

What is thediffusingtechnique in conflict

Adapters can have lenses in them to magnify or demagnify the image before it reaches the camera. This can be used to better match the camera FOV to the microscope FOV. For example, if the camera has an 11 mm diagonal FOV but the microscope is capable of an 18 mm FOV, a 0.67x adaptor would demagnify the image and allow it to be displayed on the 11 mm camera. However, this increase in FOV comes at the cost of reduced resolution.

Figure 1: Different camera FOVs displayed on the same sample. While CCD/EMCCDs have small FOVs, CMOS cameras range from 18.8-29 mm in FOV, and can be square or rectangular.

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CCDs and EMCCDs typically had smaller sensors measuring around 11 mm, this limits what you can image and is well below the maximum of most microscopes.

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At Teledyne Photometrics, we aim to create cameras that can optimally match the FOV of all modern microscopes (Table 1). For this reason, the Prime 95B Series comprises a 19 mm camera, a 22 mm camera and a 25 mm camera. Additionally, the Prime BSI and Iris 9 both fit a 19 mm microscope FOV and the Iris 15 fits a 25 mm microscope FOV. The Kinetix is our largest format sensor which is able to be used to get the maximum FOV out of any system up to 29 mm.

After I got a haircut a couple months ago, I had to learn some new techniques as my old techniques didn’t look very good on my new haircut. The biggest change I made was how long I diffuse for.

If diffusing is making your hair really frizzy, I’d first look at your diffusing technique. Are you moving or wiggling the diffuser a lot as you go? Are you constantly moving it from one place to another on your head? The more you move the diffuser around while diffusing, the more likely you are to introduce frizz.

A camera with 25 mm diagonal FOV can only image an area this large if the magnification is 1x. With a typical life science magnification of 40x, the camera FOV decreases by a factor of 40, resulting in a 625 µm diagonal FOV.

Diffusing even 5 minutes shortly after washing your hair can significantly reduce how long your hair will take to finish air drying, by reducing how much water is in your hair from the get-go. If you air dry and then diffuse it can still save you some time, but less.

The development of larger FOV microscopes and scientific cameras that can take advantage of the F-mount is relatively recent - at the time of writing only one commercially available 25 mm microscope exists. Most modern microscopes have a 19 mm or 22 mm FOV and are therefore still able to use the C-mount. The largest format spinning disk confocal systems are also limited to a 22 mm FOV.

The greater the magnification, the smaller the FOV, as shown in Figure 2. However, high resolutions depend on high magnifications (see our resolution article for more), and high camera speeds can also be obtained with smaller FOVs. So in order to image at a large FOV, it will affect other factors in your imaging. Luckily, most biological samples are small (from cells to molecules) and often don 't need the entire FOV the camera can offer.

One thing to keep in mind is that a microscope FOV is circular, and a camera FOV is square/rectangular, as seen in Fig.3 Top. Pairing an 18 mm FOV camera with a 18 mm FOV microscope does result in some areas that are not imaged, but this is largely a common factor with all imaging systems unless circular camera sensors emerge in the future. So for now, the camera FOV should aim to fit within the microscope FOV, meaning that it is best to match the FOV between camera and microscope.

Figure 3: Matching camera FOV to microscope FOV. Top . An 18 mm FOV microscope is matchedby an 18 mm FOV camera, which fits within the microscope circular FOV. Bot . Having a camerawith a larger FOV than the microscope leads to more image capture but introduces vignetting artifacts.

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