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Demi formulation fact or fiction

07 Feb

Welcome to BACK2MYROOTS B2MR:

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Having just posted an article about Demi lotion. I was very interested to find these to articles until i read them. They not only contradict each other they both mislead. The one below in the first line by confusing Demi lotion application as being another name for a semi permanent this article i was

unable to write a comment on!

 

The second posting although better was still incorrect however i was able to post comment as to whether it gets posted or not is another question!

 

Article one: from online posting

Semi Demi Colour:

Hair color procedures come in many forms. Semi-permanent (sometimes called Demi Color) is one of my favorites. This color does not enter the hair cuticle[ Demi does enter cuticle to some degree]. It’s a non-ammonia, low peroxide hair color [ As above if Demi Ammonia may be present] that only affects the outside of the hair shaft. It won’t lighten hair but can cover some Grey. I love to use it because it does not have any damaging effect on the hair, in fact it gives hair brightness and shine and makes hair look fresh and less frizzy. It’s a great process for men also as it can cover grey without looking like a guy who’s coloring his hair (which is what most men want)! It’s very natural looking.

I love doing hair color because it has the power to change how people look and feel. In my salon, over 80% of my clients get color. I’ve been doing hair color for over 35 years and still love going to work every day!

I’ve seen every change and new process in the hair salon business and change is what makes the business so exciting for me. I love sharing these changes with my clients, going to advanced hair classes and learning all the new hair trends and treatments.

Semi-permanent hair color is not exactly new but it will make you fell like you’ve got a brand new, fresh look and make your hair look healthy and shiny as well.

Above Written and posted by hairdresser

 

 

Demi-permanent hair color: from online posting

Demi-permanent color level lasts much longer, It can last through 24 to 26 shampoos. In the demi-permanent color process, pre color molecules go into the cuticles and will enter the cortex where they then partner to create medium sized color molecules. Their bigger in size which means they can take much longer to wash out. Demi-permanent color products do not contain any ammonia so the natural pigment of your hair can not be lightened. Demi-permanent color does contain a very small amount of peroxide, which adds a subtle, but noticeable, color enhancement to your hair. It also helps to blend and cover gray hair.

Above Written and posted by hairdresser

 

Article Two:

Demi response to above article:

Had a look great article most informative: But a Demi formulation may well have ammonia or another alkaline in in it, as you stated the colour molecules deposit in the cortex to get in to the cortex the cuticle has to be opened hence need for alkaline such as ammonia to create this environment the colour molecules then develop when they meet with the peroxide stimulating them to swell and develop.

The ammonia or alkaline create the environment for the colour molecules to enter the hair the peroxide reacts with the molecules swelling the new colour

It is the peroxide that lifts hair not Ammonia over time a Demi application can lighten hair given that the peroxide level is around 5vol. This lightening will only occur with prolonged use and over

Razor cutting dem
razor cutting

lapping!Thanks for the article Mike B2MR

 

 

By definition Demi Lotion formulation is as follows:

What is Demi colour how does it fit in with permanent and Semi permanent colour?

Demi permanent colour is an opaque hair colour it will generally last about 6 weeks

It main design and application would be for modern Grey coverage and refinement of under tones, also adding richness and shine has a slightly satin finish.

It will not lighten the hair’s natural pigment when mixed correctly with right developer.

It Penetrates the cuticle layer to deposit the new artificial pigment in the Cuticle  and to some degree in the Cortex, ammonia or another alkaline is required for this chemical process,  although not a formulation to lighten the hair over use or constant over lapping will over time lighten the hair slowly, due to the fact that the developer has a low level of peroxide normally less than 5vol. this percentage of Hydrogen Peroxide is required to develop the colour molecules enabling them to deposit partially in the cuticle and cortex, Semi permanent colour tend to be direct dye that lie on the cuticle layer will fade out with washing but may build upon very porous hair, In some formulation a semi permanent may have an alkaline in the to partially open the cuticle for extra deposit.

[ direct dye is fully developed colour molecule the larger the colour molecule the more the cuticle has to be opened the larger ones will not deposit as deeply so will fade quicker]

 

I hope this is helpful MikeB2MR

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