How to Lighten Hair Safely – A Step-by-Step Guide

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Adding subtle highlights or a sun-kissed balayage can be a fun way to switch up your look. But let’s face it—using hair lighteners can be tricky. We’ve all heard those horror stories about bleach disasters, and they’re definitely enough to make anyone nervous.

The good news is, that with the right steps and a bit of know-how, you can lighten your hair safely and get beautiful results right at home. In this guide, we’ll take you through the process step by step so that by the end, you’ll feel confident and ready to tackle your transformation.

How to Lighten Hair Safely (1)

Step 1: Assess Your Hair Type and Condition

Before you start, assess your hair’s current state. Is it healthy, or have you recently colored, permed, or otherwise treated it? Healthy, virgin hair (the one that hasn’t been colored or chemically treated) is the best candidate for lightening. If your hair is already damaged or over-processed, you might want to reconsider or at least take extra precautions.

Hair lightening involves removing the natural pigments in your hair (melanin). This is typically done using chemicals like hydrogen peroxide and ammonia, which break down the melanin, leaving your hair lighter. However, this process can be harsh. The chemicals not only strip color but can also weaken the hair shaft, leading to dryness, breakage, and other damage if not done correctly.

Consider Your Hair Type

Your hair type (curly, straight, thick, thin) can affect how it reacts to lightening. For example, thick, coarse hair might require stronger lightening agents or longer processing times compared to fine, thin hair. Understanding your type will help you choose the right products and techniques.

Step 2 – Choose the Right Products

When it comes to lightening, bleach is the most common product used. While bleach is highly effective, it’s also the most damaging, so it’s crucial to use it carefully. If you’re looking for a less intense option, consider using a lightening kit or a high-lift color.

These products are less damaging than bleach and can still lift your hair a few shades. However, they may not be as effective for very dark shades.

Developer Strength

The developer is another key component in the lightening process. It activates the bleach or lightener, allowing it to penetrate the hair shaft and remove the color. Developers come in different strengths, measured in volumes (10, 20, 30, 40).

Developer Volume Purpose
10 Volume Best for minimal lightening, often used for subtle color changes or toning.
20 Volume Ideal for lightening up to two shades and commonly used for gray coverage.
30 Volume Can lighten hair up to three shades and is suitable for darker hair.
40 Volume The strongest and most damaging, typically used for extreme lightening, such as going from dark brown to platinum.

Bond Builders

Bond builders like Olaplex are a game-changer in the world of lightening. These products work by reconnecting the broken bonds in your hair during the bleaching process, minimizing damage.

If you’re planning to go significantly lighter, using a bond builder can help maintain the health and integrity of your hair.

Step 3 – Prep Your Hair

Before you even think about dying, start by pampering your hair. Deep conditioning treatments and protein masks can strengthen your hair, making it more resilient to the lightening process.

Aim to do these treatments once or twice a week for a few weeks leading up to your lightening session.

Avoid Washing Right Before

Surprisingly, it’s best not to wash your hair right before lightening. Natural oils protect your scalp from irritation during the bleaching process. Try to avoid washing it for at least 48 hours before you plan to lighten it.

Step 4 – The Lightening Process

Before you begin, make sure you have everything you need:

  • Bleach or lightening kit
  • Developer (appropriate volume for your desired lightness)
  • Mixing bowl and brush
  • Sectioning clips
  • Gloves
  • Old T-shirt or towel to protect your clothes
  • Timer
  • Bond builder (if using)

Mix and Apply

Follow the instructions on your lightening product carefully. Typically, you’ll mix the bleach powder and developer in a non-metallic bowl. The consistency should be smooth and creamy, not too runny.

  1. Start by sectioning your hair into 4 parts: 2 in the front and 2 in the back.
  2. Apply the bleach to the mid-lengths and ends first, as these areas take longer to lighten than the roots.
  3. After about 10-15 minutes, apply the bleach to the roots.
Be sure to work quickly and efficiently to avoid uneven color.

Processing Time

Once the bleach is applied, set a timer. Processing time can vary depending on your hair type, the strength of the developer, and how light you want to go. Most products recommend leaving the bleach on for no more than 45 minutes. However, keep a close eye on your hair, checking every 10 minutes to monitor the lightening process.

If your hair isn’t as light as you’d like after one session, don’t be tempted to reapply bleach immediately. It’s better to wait a week or two and lighten gradually rather than risk serious damage.

Rinse and Tone

Once you’ve achieved your desired level of lightness, it’s time to rinse out the bleach. Use lukewarm water and a gentle shampoo to thoroughly wash your hair. Follow up with a deep conditioner or a bond-building treatment.

Your hair may have a yellow or brassy tone after bleaching, especially if you’re starting from a darker color. This is where toner comes in. A purple or blue toner neutralizes these unwanted warm tones, leaving you with a cooler, more natural-looking shade.

Step 5 – Post-Lightening Care

After successful lightening, the next crucial step is maintaining its health and vibrancy through proper post-lightening care.

Hydrate and Repair

Lightened hair needs extra love. Regular deep conditioning treatments are essential to keep it hydrated and healthy. Look for products that contain ingredients like keratinargan oil, and shea butter to nourish and repair your hair.

Avoid Heat Styling

After lightening, your hair will be more vulnerable to heat damage. Try to minimize the use of heat-styling tools like flat irons, curling irons, and blow dryers. When you do use them, always apply a heat protectant spray to avoid further damage.

Protect Your Color

To keep your new color looking fresh, use a sulfate-free shampoo and conditioner designed for color-treated hair. Sulfates can strip away the color and leave your hair dry. Additionally, washing your hair in cooler water can help preserve the vibrancy of your color.

Let’s Not Forget Regular Trims!

Lightening can make your ends more prone to splitting. Schedule regular trims every 6-8 weeks to keep your hair looking healthy and to prevent split ends from traveling up the shaft.

What to Avoid

@emchenhair

How to take a test strand 2.0 I posted a test strand how-to a while back on IG & tiktok using a slide cut method to inconspicuously remove the strand. A few of you commented your own ways of doing it. My favorites were: @tiff_thehairsmith said she took thin diagonal slices, @jacs831 said she used thinning shears, someone else commented that said they weaved before cutting (I couldn’t find that comment when I went back to look, so if it was you, let me know!) – so I took all of that feedback, COMBINED all 3 methods, and now I have a NEW favorite way to cut test strands. 🤌🤌 For anyone asking: “But why don’t you just test strand while it’s still in the hair & just color back over it?”⁣ ⁣ 1️⃣ leaving a singular chunk of “tested” hair on the head can create problems later on. If the purpose was to see if it would lift evenly, and then you color back over it, now it will certainly not lift evenlv with the rest of the hair. ⁣ ⁣ 2️⃣ sometimes the purpose of a test strand is to test the integrity – to see how hair with a complicated color history will stand up to lightener – if it will lift to the target shade or if it will literally 𝗠𝗘𝗟𝗧. This is the last thing I want to do on hair that’s still attached to my client’s head.⁣ ⁣ 3️⃣ if I have reason to suspect there might be metallic salts in the hair (commonly found in box dye) which will begin to 𝗦𝗠𝗢𝗞𝗘 and 𝗗𝗜𝗦𝗦𝗢𝗟𝗩𝗘 the hair when lightener is applied, strand testing is a must. Again, that’s the last thing I want to do on hair that’s still attached to my client’s head. ⁣ ⁣ 4️⃣ and lastly, so my client doesn’t have to awkwardly sit there for like 2 hours waiting for the test strand to lift, and then wait to have it re-colored. ⁣I charge hourly, so this would be a very expensive test strand, and a completely unnecessary expense for my client. ⁣ I don’t test strand every client, but for those who are looking for color corrections, have suspiciously compromised hair that looks like it has been colored over, or give me any reason to suspect issues when lightening, I absolutely test strand or I don’t do the service. I’m not willing to risk the consequences of NOT testing. ⁣ #correctivecolor #emchenhair

♬ original sound – Emily Chen

Although it might seem harmless, even small missteps can lead to less-than-ideal results, so it’s crucial to know what pitfalls to watch out for.

Skipping the Strand Test

One of the most common mistakes people make is skipping the strand test. This test involves applying the lightener to a small, hidden section of hair to see how it reacts. It’s a crucial step that can prevent disasters like over-processing or unexpected color results.

Rushing the Process

We get it—you’re excited to see the final result. But rushing through the lightening process can lead to uneven color, damage, and disappointment. Take your time, follow the steps carefully, and be patient.

Ignoring Aftercare

Lightening your hair is just the beginning. Ignoring aftercare can quickly undo all your hard work. Make sure you’re giving your hair the hydration, protection, and nourishment it needs to stay healthy and vibrant.

To Sum Up

The secret to safe lightening is all about good preparation, being patient, and taking care of your hair afterward. But if you ever feel unsure or a bit overwhelmed, don’t hesitate to call in a professional. Your hair deserves the best care, and sometimes that means letting an expert handle it.

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Aleksandra Kontic

I'm Aleksandra Kontic, a content creator and writer for 50sense, a celebrated platform known for its engaging content focused on health and wellness. My academic journey led me to study English language and literature at the Faculty of Philosophy in Novi Sad, where I sharpened my writing skills and analytical abilities. This educational path paved the way for my career in content creation, where I continue to thrive in delivering compelling narratives.
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