What must oxidation hair colors, permanent waving solutions, and chemical hair relaxers have to be able to penetrate the cuticle layer?
Must have an alkaline pH because a high pH 12 the cuticle
and it causes it to lift and expose the cortex. … Because of the different protein structure is located within the cortex.
In what layer of the hair do changes involving oxidation?
The cortex also houses the pigment (melanin) that gives hair its natural color. Services such as chemical hair relaxing, thermal styling, wet setting and hair coloring oxidation cause temporary and permanent changes to the hair. These changes take place in
the cortex layer
.
Why must oxidation hair colors permanent waving solutions and chemical hair relaxers have an alkaline pH?
why must oxidation chemical hair colors, permanent waving solutions, and chemical hair relaxers must have an alkaline pH?
to penetrate the cuticle layer
, because a high pH swells & allows for penetration of the cuticle & causes it to lift & expose the cortex the cortex chemicals must have an alkaline pH.
What are the chemical actions that take place during permanent waving?
The first function of of permanent waving (thio) neutralization is the deactivation, or neutralization, of any waving lotion that remains in the hair after processing and rinsing. The chemical reaction involved is called
oxidation
. Permanent waving solution breaks disulfide bonds by adding hydrogen.
What is the waving solution called that is used in a curl Reformation?
What is the waving solution called that is used in a curl reformation and is similar in composition to alkaline permanent waving solutions or lotions? A(n)
rap
is the application of permanent wave solution to one working panel or section of hair just before wrapping the hair on rods to pre-soften resistant hair.
What type of hair requires a highly alkaline chemical solution?
| Question Answer | Which type of hair requires a highly alkaline chemical solution? coarse, resistant hair | The most common type of perm rod is the: concave rod | The sulfites used as low-pH relaxers are compatible with: thio relaxers |
|---|
What are the safety precautions for permanent waving?
- Protect client’s eyes.
- Perform strand tests.
- Avoid scratching the scalp.
- Do not attempt to remove more than 80 percent of natural curl.
- Thoroughly rinse chemical relaxer from hair.
- Use normalizing lotion and neutralizing shampoo.
- Use conditioner and wide-tooth comb.
What are the 3 medulla types?
When the medulla is present in human hairs, its structure can be described as—
fragmentary or trace, discontinuous or broken
, or continuous. Figure 14 is a diagram depicting the three basic medullary types.
What is Vellus hair like?
This hair is
translucent and unmistakably thinner than other hair
on your body. You’ll also find these tiny hairs on your nose and eyelids. But in most cases, vellus hairs don’t appear on the soles of people’s feet or the palms of their hands. Although these hairs are common on adults, children have a larger number.
What does a healthy cuticle layer protect?
The cuticle is your hair’s protective layer, composed of overlapping cells — like fish scales or roof tiles, but facing downwards. A healthy cuticle is smooth and flat. This gives your hair shine and
protects the inner layers from damage
.
Which side bond is the strongest?
The chemical/physical changes in
disulfide bonds
make permanent waving, curl re-forming, and chemical hair relaxing possible. Although there are far fewer disulfide bonds than salt or hydrogen bonds, they are the strongest of the three side bonds, accounting for about 1/3 of the hair’s overall strength.
What are the most common wave patterns?
Whether longwave or shortwave, by far the most common pattern seen in upper air charts are
just plain troughs and ridges
. These waves and troughs are considered ‘open’ as, for the most part, there is no closed circulation associated with the waves.
What are the most common reducing agents used in permanent waving?
The most common reducing agent used in permanent waving is
thioglycolic acid
. This compound provides the hydrogen which is the catalyst in the reduction phase of the redox process. The redox process occurs during permanent waving in two phases.
What structure must be permanently broken to change the hair from straight to wavy?
| Question Answer | the tool positioned used when only a minimum degree of volume is desired is the off base | What element do most acid waves use along with tension and waving lotion to process hair heat | what structure must be permanently broken to change the hair from a straight to a curly state disulfide bonds |
|---|
What are the two major phases of permanent waving?
Two types of spiral wrapping methods are base-to-ends and ends-to-base. The two major phases in perms today involve
the physical action and the chemcial phase
. It is not necessary to blot the hair after rinsing and before neutralizing because the excess water left in the strands helps with the neutralizing process.
What are the two basic techniques for wrapping hair around a perm tool?
PHYSICAL PHASE OF PERMING
Must be familiar with distributing and sectioning and wrapping (perm tool, end paper techniques, base control and perm patterns). There are 2 basic wrapping techniques:
overlap (croquignole) and spiral
.
