What mechanism does it make hair dye product works on hair?

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Discussion Overview

The discussion revolves around the mechanisms by which hair dye products work on hair, specifically whether they coat the hair surface or alter the hair's bonding structure. Additionally, participants explore the mechanisms behind temporary hair waving products that utilize heat and electricity, contrasting them with permanent perming products that change hair bonds permanently.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant questions whether hair dye works by coating the hair or by altering the bonding within the hair.
  • Another participant suggests that the polymeric nature of hair and the physical chemistry involved in curling may be relevant to the discussion.
  • A participant describes that hair is flexible when wet and can retain a shape after drying, which relates to the mechanism of temporary waving products.
  • It is noted that chemical waves are created by breaking sulfur bonds in hair using reducing agents, followed by reformation of these bonds with oxidizing agents, resulting in permanent curls.
  • There is uncertainty expressed regarding the specific mechanisms of hair dye products.

Areas of Agreement / Disagreement

Participants express varying degrees of uncertainty regarding the mechanisms of hair dye products, and while there is some clarity on the chemical processes involved in permanent waving, the discussion remains unresolved regarding the specifics of hair dye mechanisms.

Contextual Notes

Participants have not fully explored the assumptions underlying the mechanisms of hair dye products, and there may be dependencies on definitions of terms such as "coating" and "bonding." The discussion does not resolve the differences in understanding between temporary and permanent hair treatments.

shirleydesilva
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I want to know what mechanism does it make hair dye product works on hair? Does it work only by coating on the hair surface or any special alteration of the bonding in hair?

and beside I want to ask there are products on the market such as "hot rod" which by means of electricity turn into heat and then make the hair wavy and then after washing the hair, it returns to normal, what mechnaism does this work? I know perming product change the waviness of hair by means of chnaging the bonding of the hair permanently, but just don't understand this.
 
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I would not be surprised if one of the biology people decided to talk about the polymeric nature of hair, and the physical chemistry involved in curling. It is the technical explanation of the mundane that is the heart of inspiration.

Njorl
 
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Well, about the waving: hair is very flexible when wet, it is fragile and is stretched. When you role it on something, it will shrink back into place when drying and retain that shape.

The chemical waves are produced by breaking the sulfer bonds -S- in the hair by reducing agents, after which the bonds are made again by an oxidizing agent while the hair is curled up. Those are covalent bonds, so the curls will be permanent.

Hair dye products.. good question: not sure :)
 
Originally posted by Monique
Well, about the waving: hair is very flexible when wet, it is fragile and is stretched. When you role it on something, it will shrink back into place when drying and retain that shape.

The chemical waves are produced by breaking the sulfer bonds -S- in the hair by reducing agents, after which the bonds are made again by an oxidizing agent while the hair is curled up. Those are covalent bonds, so the curls will be permanent.

Hair dye products.. good question: not sure :)

For some reason, I knew Monique would have an answer for this.

Nautica
 

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