The Silver Star hair condition guide
Hair Porosity and Perms
Can your hair handle a perm?
The answer is not hidden in a hair type label. Learn what porosity tells us, what it does not tell us and why your hair history matters before choosing a new texture.
Start with the decision
A porosity label is not a yes or no.
Color treated hair is not automatically ruled out. Equally, smooth or shiny hair is not automatically ready. A permanent wave changes the treated fiber, so the starting condition matters.[4][6]
At Silver Star, start by telling May or Tammy what has been done to your hair and what you want to change. You can explore our perm services in Sacramento without choosing a chemical formula yourself.[8]
Four ideas, shown clearly
What does hair condition actually mean?
Each board answers a different question. Open a diagram to see it larger, or read its explanation underneath.
Porosity starts with the structure.
The cuticle is the outer cover. The cortex is the inner region containing much of the keratin structure. Researchers can measure pores and uptake rather than judging a strand only by its appearance.[1][4]
Surface chemistry also matters. Research comparing hair surfaces shows that bleaching can alter how they interact with water. Porosity is not simply a picture of scales standing up.[2]
In everyday wordsThe cover and the inside both affect what can get into a strand. How easily something gets in is not the same as how strong the strand is.
See one way researchers describe water uptake
Water uptake (%) = 100 × water gained ÷ dry hair mass
Water gained means the increase from a controlled dry starting mass. This is a definition of relative uptake, not a home test or a recommended perm threshold. Measurement conditions change what the number means.
Read the diagram
The left drawing represents a more intact cuticle. The right represents a weathered cover with an altered entry path. Both contain an inner cortex. The diagram compares concepts, not measured absorption speeds.
One strand can carry several histories.
The hair close to the scalp and the oldest retained ends may not have been through the same services. Map the parts that have been colored, lightened, permed or straightened.
Bleaching can change the cuticle and cortex. Repeated waving can also change fiber properties. Covering a lightened section with darker color does not tell us that its earlier history no longer matters.[3][11]
In everyday wordsNew color changes the look. It does not erase what happened to the hair before.
For the bond changes themselves, read how permanent waves change hair. Here, the question is whether another service makes sense for the hair you have now.
Read the diagram
Trace the strand from newer growth to middle lengths and older ends. Earlier chemical services can remain on only some parts. The key is to identify those areas rather than assume the whole strand is identical.
Stretch and recovery are different from uptake.
Elasticity concerns how a fiber deforms and recovers. Strength concerns resistance to breaking. A strand stretching farther is not automatically stronger or healthier.
Experimental work shows that wet and dry fibers can behave differently. Chemical treatment and repeated grooming can affect water uptake and mechanical behavior, so one clue should not stand in for the full assessment.[5]
In everyday wordsWe need to ask two questions: what gets into the hair, and how the hair holds together.
See the simple idea behind strain
Strain = increase in length ÷ starting length
This defines relative extension. It does not set a safe amount to stretch hair at home. Recovery, force, moisture and breakage must be considered separately.
Read the diagram
The fiber begins at one length, extends under force and is then released. One outcome shows recovery. Another shows poor recovery or breakage. The picture explains why extension alone cannot establish strength.
A suitable plan uses all the clues.
The useful question is not just whether the hair absorbs a product. It is whether the current fiber and the chosen system are suitable for the requested texture.
A preliminary strand assessment and a processing test curl are different things. Manufacturer instructions vary. One system requires test curls during processing, while another specifically says not to take them.[6][7]
In everyday wordsUse the hair history, the condition and the actual product instructions together. Sometimes the better plan is to wait or choose a different service.
Read the diagram
Three inputs lead into a professional assessment: hair history, current condition and the chosen product restrictions. The next step may be a suitable service plan, further testing or postponement. A porosity label cannot make that choice alone.
Low, medium and high
Useful words, not a processing clock.
Use porosity labels as conversation starters. Research measures specific properties under specific conditions; a label is not a complete measurement of your hair.[1][2]
You may describe hair that seems harder to wet. That observation does not automatically justify stronger lotion, added heat or extra processing time.
Even without obvious damage, review previous services. A familiar label is not a guarantee that every part of the hair will respond the same way.
Investigate the history and current integrity. More ready uptake does not mean the hair can tolerate a stronger chemical change.
There is no reliable minutes chart based only on low, medium or high porosity. A review of perm chemistry describes variation in reaction rates among hair samples. Formula choice and the actual hair matter, not just a category.[10]
A floating or sinking strand does not measure chemical compatibility, remaining fiber strength or every previous service. Laboratory wetting and pore measurements are more specific than that. Do not use a float test to approve a perm.[1][2]
A photo can communicate curl size, length and shape. It cannot establish elasticity, the exact processing history or which formula is suitable. Use the photos on this page as style references.
Different hair, different questions
What should you discuss for your hair?
Separate the look of the hair from its history and condition. These are questions to bring to a consultation, not automatic product assignments.
Fine strands
Fine describes the width of individual hairs. Explain whether your main concern is breakage, limited movement or a curl that feels too strong. Ask how the plan respects the strand condition.
Lower density
Density describes the amount of hair, not the size of each strand. Discuss where you want more visual lift. A perm changes existing hair; the result should not be presented as new hair growth.
Coarse or dense hair
Clarify whether you mean thicker strands, a lot of hair or both. Do not translate either description into an automatic request for extra heat or stronger lotion. Ask about sectioning and the selected system.
Bleached or highlighted hair
Identify which parts were lightened, how often and whether products overlapped. Excessive bleaching can affect both outer and inner structures, so a smooth finish alone is not enough to choose another service.[11]
Gray hair
Gray describes pigment. It is not a complete condition report. Share any previous color, smoothing or perm services and explain the shape you want. Do not choose a processing time from color alone.
Long hair or a previous perm
Discuss where the earlier treatment remains and whether another service would overlap. Repeated treatment has shown different effects from a single treatment in laboratory work. A new appointment does not make the old lengths new hair.[3]
At Silver Star Salon
Bring your hair history to May or Tammy.
May Wong and Tammy Phang are the sisters behind Silver Star Salon. Our perm service information puts the consultation before choosing the texture plan: the starting haircut, length, density, condition and chemical history all matter.[8][9]
That connects the science to a practical appointment. Rather than asking for a stronger perm, explain what you want the finished hair to do.
Describe the result
Show the amount of wave, curl, lift or movement you like. Say where you do not want extra volume.
Explain the history
Bring details of color, bleach, earlier perms and straightening, including treatments still present on the ends.
Discuss current condition
Point out breakage, rough sections or a change in how the hair feels when wet. Do not hide a concern to get a particular style.
Review the service plan
Ask how the proposed placement and curl pattern fit the haircut and what the selected product permits.
Be open to a different plan
The consultation may change the target, the amount of hair treated or whether a perm should happen now.
Leave with a care routine
Discuss how to wash, dry and style the finished texture, and when to reassess it rather than automatically repeat the service.
The aim is an appropriate result, not the strongest chemical change. Careful planning reduces avoidable mistakes; it cannot make every hair type suitable or guarantee a service without damage.
Why the actual formula matters
Two named systems, different instructions.
Product names are useful when they explain a real difference. These manufacturer examples show why the checking method cannot be copied from one perm to another.
| Texture EFX Color Treated Perm | Its ingredient list includes cysteamine hydrochloride in the waving lotion and hydrogen peroxide in the neutralizer. The directions require a test curl. Read the full current instructions for that exact product.[6] |
|---|---|
| Quantum Firm Options Alkaline Perm | Its lotion contains ammonium thioglycolate. The directions specify no processing test curl and provide different wrapping options. It is not interchangeable with the checking routine above.[7] |
These are educational product examples, not a claim that either was used in the client photos. Ask May or Tammy which formula is proposed for your hair. A conditioner or bond care treatment is not a substitute for the waving system's suitability limits.
A suitability check comes first
Where useful and compatible with the system, preliminary strand assessment can inform a service decision. It is not the same as repeatedly unwrapping a curl during processing.
Follow the chosen system
Use its instructions for preparation, wrapping, checking, rinsing and neutralizing. Manufacturer guidance also cautions against excessive wrapping tension.[7]
A real Silver Star transformation
A shorter shape with visible lift.
These three photos show the same client. She came in with long hair and limited fullness at the front. The finished photos show the shorter cut and perm transformation from the back and side.
The cut, texture and finishing work together to change the outline. Use this transformation to discuss the shape you want, while keeping the condition assessment specific to your own hair.
The useful lesson
A request for fullness may be about the haircut and where the texture sits. It is not automatically a request for the tightest curl.
What changed
The visible result includes the cut, perm and finishing. The photographs have different angles and lighting, so this is not a controlled experiment.
What remains individual
This is a styling transformation, not new hair growth. The photos do not measure porosity or identify the formula used.
Use the photos to explain your goal
Different shapes, not porosity categories.
These supplied Silver Star results show short and medium length texture. None is labeled low or high porosity from its appearance. Tell us which details you like, then discuss your own starting point.
Some photos show a freshly styled or damp finish. No formula, rod size or individual stylist attribution is inferred from these images. See our men's perm services and results.
Questions before you call
Perm suitability, explained clearly.
Can high porosity hair be permed?
A label alone cannot answer that. Identify why the hair seems porous, its current condition and the restrictions of the proposed product. More uptake does not automatically mean more tolerance for processing.[1][10]
Does low porosity mean I need a stronger perm?
No automatic rule follows from that label. Do not add heat or change timing just because hair seems resistant. Use the actual system's instructions and the professional assessment.[6][7]
Can highlighted or bleached hair be permed?
Some professional systems are intended for certain color treated hair, but that does not approve every lightened head. The amount of processing, overlap and current condition matter, and the product restrictions still apply.[6][11]
How long should I wait after bleaching?
There is no universal waiting period that makes every previously lightened strand suitable. Tell the stylist what was used and when. Do not treat the passage of time as proof that the treated fiber has returned to its original condition.[11]
Does a strand test guarantee no damage?
No. A sample provides information about that sample under those conditions. It does not prove that every section is identical or replace the selected product's directions.
Can a perm make thin hair grow?
A perm reshapes existing hair. The gray hair transformation on this page shows a change in haircut and visible texture, not an increase in hair follicles. Describe whether your concern is fine strands, limited density or both.
What should I ask May or Tammy?
Ask what your hair can support now, which areas would be treated, which formula is proposed and how to maintain the result. Bring the chemical history and photos that communicate your preferred shape.
Silver Star Salon
Start with your hair, not a label.
Talk to May or Tammy about your previous services, any concerns and the texture you want.
8275 Florin Rd #190, Sacramento, CA 95828Read the evidence
Sources and image notes
Laboratory studies explain mechanisms. Manufacturer directions explain a specific system. The salon information describes the consultation. None of these sources measures the porosity or chemical response of the photographed clients.
- Hessefort, Holland and Cloud, 2008. True porosity measurement of hair: a new way to study hair damage mechanisms.Original gas sorption study. Supports pore structure measurements and changes with oxidative damage. It does not provide a salon timing chart.
- Weiand and colleagues, 2022. Coarse grained molecular models of the surface of hair.Molecular modelling with experimental wetting comparisons. Supports the role of surface chemistry, rather than cuticle appearance alone.
- Han and colleagues, 2008. Effects of permanent waving on changes of protein and physicomorphological properties in human head hair.Original laboratory study. Supports the importance of formulation and repeated processing for hair structure and mechanical behavior.
- Zhang and colleagues, 2015. Effect of shampoo, conditioner and permanent waving on the molecular structure of human hair.Original structural study in PeerJ. Supports the distinction between surface appearance and molecular changes after permanent waving.
- Cosmetics, 2025. Porosity and Resistance of Textured Hair: Assessing Chemical and Physical Damage Under Consumer Relevant Conditions.Original study of textured hair samples. Examines water uptake, thermal behavior and dry versus wet mechanical behavior after treatment and grooming cycles.
- Zotos Professional. Texture EFX Color Treated Perm.Manufacturer ingredients and directions. A named example with cysteamine in the lotion and a required processing test curl.
- Zotos Professional. Quantum Firm Options Alkaline Perm.Manufacturer ingredients and directions. A named thioglycolate example with a different checking method and specific wrapping instructions.
- Silver Star Salon. Perm services and consultation.Salon service information. Supports the consultation, service range and contact details described here.
- Silver Star Salon. Meet May Wong and Tammy Phang.Salon profile. Supports the names and roles of the co owners. No stylist is identified as reviewing this article without confirmation.
- Evans, 2021. A Review of Permanent Waving and Perm Chemistry.Review of perm chemistry and experimental kinetics. Supports variation in reaction rates and the limits of a universal processing rule.
- Kim, Oh and Chang, 2024. Effects of excessive bleaching on hair: comparative analysis of external morphology and internal microstructure.Original microscopy study of excessive bleaching. Supports cuticle and cortex damage under the studied conditions, not a diagnosis from client photos.
The salon supplied the client photos and identified the three gray hair images as the same person's before and after transformation. Photographs retain the original hair appearance. The four whiteboard diagrams are simplified educational illustrations, not clinical images or measured rates.
