(+84) 962 279 910
How Long to Leave Bleach in Hair 30 Vol to Lighten Hair?

How Long to Leave Bleach in Hair 30 Vol to Lighten Hair?

Last updated date Mon Oct 09 2023 By William Brown

Fashion Blog

Are you aware of the rules of bleaching the strands? Most people know about using different bleaching products without knowing the basic rules. Bleaching can be drastic for the condition of hair if the person is unaware of the right techniques. In this guide, we will share information on how long to leave bleach in hair 30 vol.

Can We Leave Bleach In Our Hair Too Long?

Depending on the type and texture of hair, you can leave the bleach for long enough. However, it can cause irreversible damage when left on the hair for more than recommended time. Thus, it is extremely important to follow the directions of applying bleach properly. Moreover, you should wait for at least 2 weeks before applying bleach again on the hair.

How Long To Leave Bleach In Your Hair?

Various factors determine how long one should leave the bleach on their hair. However, as a rule of thumb, you should carefully follow the instructions mentioned in the bleaching kit.

You should never leave the bleach on the hair for a longer time than mentioned. Here are the factors one needs to consider to determine how long to leave bleach in hair 30 vol.

1 - Your Hair Type

The hair plays an important role in determining how long we should leave the bleach on our hair. For instance, people with virgin hair should not leave the bleach on their hair for too long. Since the hair has never been chemically processed before, it can quickly lighten.

2 - Your Starting Color

The present hair color needs to be considered to understand how long it will take to make it lighter. For instance, people who are starting to bleach their dark hair need to keep the bleach on their hair for a longer time to get the desired lightness.

On the contrary, those with light brown or golden hair color will need to leave the bleach on their hair for less time. According to AAD, people should use a bleaching color that is not more than 3 shades lighter than their natural hair color.

When someone bleaches their hair with color more than 3 shades lighter, they become severely damaged due to the high volume of peroxide used.

3 - Your Desired Color

The desired color differs from person to person. It determines how long they should leave the bleach on their hair. For instance, those who want to lighten only one shade other than their natural hair color should keep the bleach on their hair for less time.

Many people are unaware that the bleach won’t lighten the hair more after it gets dried. Thus, they leave the bleach on their hair for a long time which doesn’t provide a lighter hair color.

4 -  Type Of Developer

Most bleaching kits come with pre-mentioned instructions on how long you should leave the bleach on. However, if you are visiting a salon, it depends on the developer they are using to bleach. A developer might come with a lower volume. In such a situation, they will leave the bleach on your hair for a long time.

How To Know When It Is Time To Remove Bleach?

Most people don’t know how long to leave bleach in hair 30 vol. Thus, it is best to set timers according to the time mentioned in the instruction of the bleaching kit. Alternatively, one can realize by periodically checking the change of hair color to understand how long they need.

For the people who have never bleached before using the same kit, take a test strand and check the result. This is the best way to find out how the color will change before applying it to the entire head. For the test, apply bleach on the hidden strands and determine how long it takes to become light.

What Happens If You Leave The Bleach On For Too Long?

Most people think that leaving the bleach on the hair will give better results. However, leaving bleach for more than 30 minutes can severely damage the hair instead of lightening the color.

>>> Read more: How to bleach hair safely and tips to hydrate your hair after bleaching <<<

Other Dangers Of Bleaching

Here are the dangers of bleaching on the hair:

Hair Can Turn White

If someone leaves bleaching on their hair for a long time, the oxidation process can result in hair loss of all the pigment and become white. People should read the instructions in the kit if they don’t know how long to leave bleach in hair 30 vol.

Ability To Retain Moisture Could Be Lost

Several people found that their hair has become weak after bleaching. Additionally, most bleaching hair colors don’t suit the skin and can give a severe reaction.

Using bleach can make the hair extremely porous. Over time, hair loses its ability to retain moisture. Repeated bleaching can destroy the hair shaft.

Hair Starts Losing Keratin

Several people faced the most serious problem caused by bleaching, which is the loss of keratin. Keratin is a protein that helps you to make different hairstyles. After losing keratin, the hair becomes brittle and unmanageable. Loss of keratin is an unavoidable problem if you choose to bleach the hair.

Precautions Before Bleaching

Complete A Patch Test Beforehand

If you are using the bleaching kit first, take a patch test before applying it to the entire hair. Most people have some allergy to certain ingredients.

The chemical in the bleach might not suit everyone and can give skin reactions. Moreover, the test will allow you to find the time it will take to lighten hair color.

Read Directions Carefully

According to hairstylists, one should always wear gloves and protective eyewear before applying bleach on their hair. You should set different timers to keep a check on the color change.

Consider Your Hair Type

Girls who have previously straightened their hair should avoid bleaching because the hair has already been treated and can cause severe damage. Those who have curly hair should ensure that they are using bleach which is not too harsh. Additionally, they should be gentle with their hair while applying it.


We hope you now understand how long to leave bleach in hair 30 vol. You must read the instructions mentioned on the bleaching kit before applying it. Wear gloves and protective eyewear while bleaching. Never leave the bleach on your hair for more than 30 minutes.

>>> Read more: Can you bleach wet hair everything you need to know <<<


William Brown

William Brown


William is a professional hair stylist with over 10 years of experience. He is passionate about creating personalized, trendy looks for his clients and specializes in hair treatments and updos. He is now a certified hair adviser for Mic Hair Company. His articles are always filled with advice, pro tips, and latest hair research results.


you may like

Recommended Products

(2 Reviews)

Vietnamese Deep Curly Wave Bulk Hair - MICHAIR

from $16.1

Chijoke Chindima:Just wanted to say Mic Hair is a great company. I have been buying from them for years and have never had any issues with anything. They do a great job and always stand by their products and what they can deliver.

(3 Reviews)

Vietnamese Black Straight Hair 360 Lace Frontal - MICHAIR

Contact us

Bellezza Powell:I have been buying hair of Michair for years and always happy with hair. They have enough all hair extensions I need for my customers

(2 Reviews)

High Quality Vietnamese Black Straight 13x4 Lace Frontal - MICHAIR

from $84

Selena tran:I bought my first set of extensions in June 2022 and I'm still going strong! Love them! They're beautiful. And when it's time to get new ones, they're still gorgeous and I get compliments on how great my hair looks every day.

(2 Reviews)

Wavy brown Human Hair Weft Bundles

from $27

Rose Bella:Being scammed by a Chinese company in the past, I’m quite scared . However, everything has changed when working with MIC Hair. They are super nice and honest to me. ✔✔

Piano light brown hair egg curl bone straight black hair

Want to get updates on Michair news?


Data updating

Please wait a moment