How much hair dye do i need

When you are dying your hair at home, it is important to use enough dye to ensure that your hair is fully covered. If you do not use enough dye, the results may be streaky or patchy. In most cases, you will need at least three oz of dye to cover your entire head of hair.

So in this Article I will continue to answer your questions! There, it will be rather an explanation because I was asked for an explanation of the dosages of the mixtures of professional colorings.


When it comes to hair dye, how much do you really need?

Depending on the color you are looking to achieve, you may only need a small amount of dye. If you want a lighter shade of color to reflect, a little bit of dye will go a long way. However, if you are looking for a darker color, you will likely need more dye. To be sure, always read the instructions on the hair dye box.

The amount of hair dye you will need to cover your entire head depends on the length, thickness and color of your hair. In general, you will need at least 3 ounces of hair dye to cover your head completely, about 2-8oz depending on the type and texture of the hair. If you have long or thick hair, you will need lot more than 3 ounces. If you have short or thin hair, you may need less than 3 ounces. You will also need to purchase a developer, which is usually sold in a kit with the hair dye.

So what I call the dosages are the ratios to make the mixtures:

  • 1:1
  • 1:1,5
  • 1:2


Long hair

The most difficult part is figuring out how many ounces of hair dye to use for long hair because “long” is a subjective term. It could refer to hair that is a few inches below your shoulders, known as “bra-strap length,” waist-length hair, or below your waistline.

Here’s how to figure out how many ounces of hair dye you’ll need:

Use roughly 4oz of hair dye for long hair that extends 2-4 inches below your shoulder. To be on the safe side, use 8oz of hair dye for hair that extends to waistline length or more.

So, every time you want to color it at home, bring three 2oz hair dye just in case. It’s fine if there’s some left over since you can use it to create a more deep color by distributing it through your hair. However, you should never run out of hair dye because that might be really bothersome.


Short hair

You may just need 2oz to 3oz of hair colour for your short hair. Even if you intend to completely cover your head.  Unless your hair is extremely thick, in which case you’ll require a little more.

For a lob that went a few inches past my chin, though, 2oz – 3oz was always enough.   To minimize wasting dye, you can use only one box dye. If you have short hair and want to use semi-permanent or permanent hair dye, you can get a single 2.5oz hair coloring kit. That should suffice to color your hair.


Medium length hair

Shoulder length hair or a little about 1-2 inches longer hair is considered “medium-length” by most people.  This length of hair is problematic since the amount of hair dye you use is always incorrect.

Either you believe your hair length is on the shorter side and that one package will suffice. Or you go crazy and buy two boxes, only to end up with a dish full of hair dye. so, f For this hair length, I recommend applying 3 to 4 oz of hair dye.

If your hair is thicker, you can buy two additional boxes of hair dye to get 4 oz. Alternatively, you can purchase a huge 3oz package and use it to cover your entire head.


Thick hair

Because of its volume, thick hair is challenging to color. However, it also presents a number of difficulties. It might be difficult to choose the proper amount of hair color for thick hair because thick short hair can be deceiving, and you may wind up purchasing a 2oz hair dye bottle only to discover that it is insufficient to cover your thick locks. Thick hair strands also make it difficult for color pigments to penetrate. As a result, you may need more hair dye to achieve the desired color shade.

To be safe, use 2.5 oz or 3 oz of hair dye if you have thick short hairdo.


Medium thick hair

Well it’s challenging because situation may be that you used to have thick hair and bought dye depending on that but because of any reason you have loss hairs. Now you have lot of dye waste.

Because of tis it’s better to get a good picture of your hair thickness before buying your dye.


Thinning hair

In this case you won’t need as much hair dye. 2oz will be enough for most if you don’t have very long hair.


Now for explanations of the dosages of the professional coloring mixtures

What you need to know above all is the products we need for our color mixtures. So it’s simply:

  • a colorant tube which is the tube of dyes
  • and oxidant

We are not going to go into detail in this video in explanations of the coloring numbers or the dosage of the oxidant, but only talk about mixtures according to the ratios 1:1, 1:1.5, 1:2.


The first digit is for the color dosage and the second digit is for the oxidant dosage .

The basis of the ratio will be the amount of color needed and the oxidant will follow according to the chosen ratio, for example:

For the 1:1 ratio:

  • if we need 50ml of colorant we will have exactly the same quantity of oxidant so 50 ml of oxidant .
  • if we need 100ml of colorant we will therefore put 100ml of oxidant .

For the 1:1.5 ratio:

  • if we put 50ml of colorant , then we will put 1 and a half times of oxidant so 75ml of oxidant  (50 + 25 ml).
  • if 100ml of color is used , then 100 multiplied by 1.5 would give 150ml of oxidant (100 + 50ml).
  • For the 1:2 ratio:
  • if you put 50ml of colorant, then you will have to multiply the dose by 2 for the oxidant so 100ml
  • if 100ml of color is used then twice as much oxidant would give 200ml of oxidant for 100ml of color.

So as you can see it’s quite simple to understand and super easy, you don’t need to be a math pro to do these little reports! The only thing to remember is that the 1st number is for the colorant and the 2nd for the oxidant.


What you need to understand and what you need to know

In the colorant there are pigment dyes and in the oxidant there is no dye. So the more oxidant you put in your coloring mixture, the more you will dilute the colorant, so the more you dilute the dyes. It’s stupid like that what I’m telling you, but it’s to explain to you that we don’t make our choice of dosage by choosing for example the 1:2 by telling ourselves that we will save colorant. If you don’t have enough color for long, thick hair, you don’t double the oxidant just to have more product! We don’t make these dosage choices just like that

Because if you do a bad dosage by diluting the pigments of a color too much, you will not obtain the desired color. So we do not do a dosage anyhow to save product or to have more.

In general, there are small explanations on the instructions for the colorings, and the 1:2 ratio is specified that it is for very lightening, the “super lightening” colorings. We do not do the 1:2 dosage for any color. You have to choose the right dosage according to the color chosen, the desired effect, according to the hair finally according to all the small criteria to be examined in order to choose the right dosage. I insist on this point because these are things that are unfortunately done in some hairdressing salons or by hairdressers just to save product and this can give bad results on the hair depending on the colorant

Each dosage has its specificities, I will not go into all the details in this video it would be a little too long, I will stay in the explanation of the mixtures of dosages 1:1 – 1:1.5 – 1:2 but in having given you all the same these few details so that you understand that we do not do these dosages just anyhow and we do not double our oxidant for any reason   otherwise, as you have seen, the dosage of coloring is very easy to do.


Why is it important to dose and weigh products for coloring?

Taking the time to know the necessary measurements for colorant and developer, knowing how to calculate the dosage and weighing it is essential for a successful hair color.

Indeed, if you color, highlight or even sweep for your client by making an approximate calculation of the “colorant and oxidant product” mixture, without following the exact dosage, you risk using more product than is necessary. actually need it. 

In addition, if you do not follow the precise dosage during a coloring for example, you will not be able to achieve an identical hair color during the next appointment! You are also exposing yourself to the colorant not pleasing to your client or the color not being at all the desired one.


How to weigh?

The use of an electronic scale allows you to dose the exact weight of product needed in grams or milligrams to perform the coloring.

It is important to keep in mind that a dosage of products carried out without being correctly dosed and weighed can lead to coloring that “slips”, which does not last over time, which does not take on white hair. In the long term, your customers may stop using you and give you bad publicity.

From one brand to another but also from one range to another, the mixing ratios, that is to say the proportions of products to be dosed to produce a color, are different . This is why following the instructions specific to the technique performed is essential.

Finally, not weighing can cause you to use too many products: this leads to overconsumption but also to a waste of your stock.


How to calculate a mixing ratio?

To achieve a mixing ratio to apply color or highlights, for example, you must understand the calculation.

Here are some examples :

  • The mixing ratio indicates for example “1 + 3  ”, this means 1 dose of color  for  3  doses  of oxidant . If a dose represents 20 grams, it will therefore be necessary to weigh (using a scale) and mix 20 grams of color (1 dose) + 60 grams of oxidant (3 doses, 3 times 20 grams).
  • The mixing ratio indicates “  1 + 1.5  ”, this means 1 part color for 1 part and a half and oxidant. If 1 dose represents 20 grams. It will be necessary to weigh and mix 20 grams of color (1 dose) + 30 grams of oxidant (1 dose and a half, that is to say 1 dose of 20 grams + half of a dose (0.5), i.e. 10 grams).
  • The mixing ratio indicates “  1 + 2”, this means 1 part color for 2 parts oxidant. If 1 dose is 30 grams. It will be necessary to weigh and mix 30 grams of color (1 dose) + 60 grams of oxidant (2 doses, i.e. twice 30 grams).

At home, the ammonia concentration in the products is lower, so it is vital to respect the mixing ratio communicated by the brand.

In addition, it is true that hairdressers do not take all the equipment and products to their homes, which is why it is essential to know the dosage of the products that will be used with a client. This allows you to take only the tubes of products to be used

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