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The Architect and the Finisher: A Scientific Deep Dive into Hair Treatments and Rinses[link]

(docs.google.com)

1 point by karyan03 1 month ago | flag | hide | 0 comments

The Architect and the Finisher: A Scientific Deep Dive into Hair Treatments and Rinses

Section 1: The Fundamental Dichotomy: Nourishment vs. Surface Coating

1.1 Difference in Core Functions

In the world of hair care, rinse (conditioner) and treatment are often used interchangeably, but their fundamental roles and mechanisms of action are distinctly separate. Understanding the difference between these two products is the first step toward effective hair management.

Treatment (The Architect): The core function of a treatment is to deliver nutritional ingredients into the hair shaft to repair and strengthen its damaged structure.1 This is an "inside-out" approach that primarily targets the cortex, the central part of the hair. Its goal is to temporarily replenish structural components like protein, which are lost due to frequent perms, coloring, and heat styling, thereby improving the hair's fundamental strength and elasticity.3

Rinse/Conditioner (The Finisher): In contrast, the main function of a rinse is to form a protective film on the surface of the cuticle, the outermost layer of the hair, to soften it and reduce friction.5 This is an "outside-in" approach focused on improving the hair's texture, manageability, and appearance. It provides immediate softness and shine, prevents static electricity, and protects the hair from external stimuli.1

This difference can be compared to the process of repairing a damaged road. A treatment is like the structural repair work of filling in potholes. This is a fundamental task that restores the road's durability and safety. On the other hand, a rinse is like the finishing work of painting lines and coating the surface of the repaired road to make it smooth. This improves the road's immediate usability and appearance while protecting the surface from the external environment. One is responsible for structural integrity, the other for surface functionality and protection.

1.2 Answering the Core Question: "What is the most crucial functional difference?"

The clearest answer to the user's first question lies in the difference in their target location and mechanism of action.

A treatment targets the hair's internal structure, the cortex, and provides structural support through penetrative ingredients like hydrolyzed proteins.2 In contrast, a rinse targets the hair's external surface, the

cuticle, and manages the surface through adhesive ingredients like silicones and cationic surfactants. This fundamental difference dictates all other characteristics of the two products, including their usage instructions, recommended frequency, and ingredient composition.

Table 1: Comparative Analysis of Rinse vs. Treatment

FeatureRinse (Conditioner)Treatment (Hair Pack/Mask)
Primary FunctionSurface coating and flexibilityInternal nourishment and damage repair
Primary Action SiteCuticle (Outer layer)Cortex (Inner core)
Key Active IngredientsCationic surfactants, silicones, fatty alcoholsHydrolyzed proteins (LPP/PPT), amino acids, vitamins, oils
Mechanism of ActionElectrostatic adhesion and film formationPenetration via diffusion and internal replenishment
Recommended Leave-in Time1–3 minutes10–20 minutes
Recommended FrequencyDaily (or with every shampoo)1–3 times per week
Main EffectsImmediate detangling, shine, static reductionImproved elasticity and strength, enhanced moisture retention (long-term)

This table provides a clear, at-a-glance comparison of the fundamental differences between the two products and serves as a reference point for understanding the entire report. The differences in each category are not merely marketing distinctions but scientific facts based on the chemical properties of the ingredients and their interaction with the hair structure.

Section 2: The Science of the Hair Shaft: A Microscopic Perspective

To understand how hair care products work, one must first scientifically understand the structure of the hair and the process of damage. Hair is not a simple fiber but a complex tissue with intricate structures and chemical properties.

2.1 Hair Anatomy 101

The hair shaft (the part of the hair visible above the scalp) is composed of three main layers.4

  1. Cuticle: The outermost layer, consisting of overlapping, transparent cells that resemble fish scales. It acts as armor, protecting the inner parts of the hair, and determines its shine and smoothness.
  2. Cortex: The central core, making up about 80-90% of the hair's mass. It is composed of bundles of keratin protein fibers and determines the hair's strength, elasticity, and color.
  3. Medulla: The innermost part of the hair shaft, which is not present in all hair types. Its function is not clearly understood.

The most crucial fact is that the hair shaft is composed of dead cells.3 This means it cannot self-repair or regenerate like skin. Therefore, once damaged, the only way to manage and repair it is through external products.

2.2 The Chemistry of Hair Damage

Hair damage begins when the cuticle is lifted or destroyed.

  • Physical Damage: Excessive combing when wet or rubbing vigorously with a towel can wear down and lift the cuticle layers.4
  • Chemical Damage: Alkaline chemical products like hair dye or perm solutions forcibly open the cuticle to allow chemicals to penetrate the cortex. In this process, the cuticle can become permanently lifted and porous, allowing internal proteins to be easily lost.4
  • Heat and UV Damage: High heat from hair dryers or straighteners, as well as ultraviolet rays, can denature the keratin protein structure within the cortex, making the hair weak and brittle.4

As a result, damaged hair has an open, rough cuticle and carries a negative (-) electrical charge. This leads to increased friction (tangles), moisture loss (frizz), and a weakened cortex (breakage).4

2.3 The Decisive Role of pH

One of the core principles of hair care is pH balance.

  • Healthy hair and scalp maintain a slightly acidic state with a pH between 4.5 and 5.5.11 In this state, the cuticle lies flat and closed.
  • Most shampoos are slightly alkaline to enhance their cleansing power. This causes the hair to swell slightly and opens the cuticle, which helps to effectively remove dirt and oil.6
  • Rinses and treatments are formulated to be acidic. This acidity neutralizes the alkalized hair after shampooing and causes the open cuticles to contract and close tightly.11 A closed cuticle prevents moisture and nutrients from escaping the hair's interior and creates a smooth surface that reflects light evenly, resulting in shine.

Based on this principle, the "Shampoo → Treatment → Rinse" order is not just a recommendation but a systematic pH adjustment process: "Alkaline (Open) → Infuse Nutrients → Acidic (Close)." The alkaline shampoo opens the door (cuticle), the treatment delivers nutrients (protein) through that door, and finally, the acidic rinse closes and locks the door. This provides a strong scientific basis for the recommended order of use.

Section 3: Action Mechanisms: Penetration and Adhesion

The functional difference between treatments and rinses stems from the two different physicochemical mechanisms by which their ingredients interact with the hair: penetration and adhesion.

3.1 Internal Operations: The Science of Treatment Penetration (Answer to Q3)

The question of how a treatment's nutritional ingredients can penetrate deep into the hair can be explained by the principles of molecular size and diffusion.

  • Opening the Gateway: As explained earlier, the slightly alkaline environment during shampooing opens the cuticle, creating a pathway for nutritional ingredients to enter. In already damaged hair where the cuticle is lifted, this pathway is even wider, facilitating easier penetration.4
  • The Importance of Molecular Size: This is the key to how treatments work. A typical protein molecule is too large to pass through the gaps in the cuticle. Therefore, to enable effective penetration, proteins undergo a process called hydrolysis, which breaks them down into smaller pieces.17
    • Hydrolyzed Keratin/Collagen/Silk: These ingredients are protein fragments small enough to actually reach the cortex.13
    • LPP (Low Molecular Polypeptide) vs. PPT (Polypeptide): This is a more technical distinction. LPPs are very small, low-molecular-weight protein fragments with excellent penetration power, allowing them to reach deep into the cortex.3 In contrast, PPTs are relatively larger protein fragments that primarily act on the outer part of the cortex and the cuticle layer.3 The reason high-performance, premium treatment products emphasize LPP ingredients is precisely because of this superior penetration ability.3
  • The Role of Time: Penetration is a diffusion process, which requires time. The reason treatment products recommend a leave-in time of 10–20 minutes is to allow these small molecules sufficient time to travel from the hair's surface into the cortex.1

3.2 Surface Science: The Electrostatic Adhesion of Rinse

The principle behind how a rinse instantly softens hair lies in electrostatic attraction and film formation.

  • Opposites Attract: When hair is damaged, its protective lipid layer is stripped away, exposing the negative charge (-) of the underlying keratin protein on the surface.
  • Cationic Surfactants: Rinses contain ingredients that carry a positive charge (+), such as Behentrimonium Chloride (cationic surfactants).26 This positive charge is strongly attracted to the negative charge on the surface of damaged hair, much like a magnet, causing it to adhere preferentially to the most damaged areas.
  • Film Formation: Silicone ingredients like Dimethicone and fatty alcohols like Cetyl Alcohol work together with these cationic surfactants to form a thin, smooth, hydrophobic (water-repellent) film on the hair's surface.16 This film physically presses down the lifted cuticles, reduces friction between hair strands to prevent tangles, and seals in moisture.1

In conclusion, the recommended usage time on a product's label is a crucial clue to its core function. A short time of 1–3 minutes implies a rapid adhesion mechanism on the surface, while a longer time of 10–20 minutes suggests a deeper penetration mechanism is required. Consumers can infer whether a product's main purpose is "finishing" or "architectural" just by looking at the instructions.

Section 4: A Chemist's Guide to Key Ingredients

The effectiveness of hair products is ultimately determined by the chemical properties of their ingredients. This section provides an in-depth analysis of silicones and proteins, the representative components of rinses and treatments.

4.1 The Silicone Spectrum: Beneficial or Harmful? (Answer to Q4)

Silicone is one of the key ingredients in rinses, and there is much debate about its effects and safety.

  • Function: Silicones, represented by ingredients like Dimethicone and Cyclopentasiloxane, are polymers that form a thin, water-resistant film on the hair surface, providing excellent softness, shine, and heat protection.2
  • Advantages:
    • Immediate Cosmetic Effect: Instantly detangles and softens hair, reduces friction, and imparts a brilliant shine.1
    • Protective Function: Coats the cuticle to protect hair from humidity (preventing frizz) and can reduce damage from heat styling tools.8
    • Safety: Chemically very stable and inert, with a low probability of causing skin irritation or allergic reactions.29
  • Disadvantages:
    • 'Build-up' Phenomenon: Non-water-soluble silicones, in particular, can accumulate on the hair if a shampoo without strong sulfate-based cleansing agents is used. This build-up can make hair feel heavy and greasy, and it can also block the absorption of moisture or treatment nutrients.2
    • Blocking Nutrient Absorption: The silicone film acts as both a protective layer and a barrier. If a rinse is used before a treatment, this film can prevent the treatment's active ingredients from entering the cortex, significantly reducing its effectiveness.2
  • Understanding the Types is Key: Not All Silicones Are Created Equal.
    • Non-soluble Silicones: (e.g., Dimethicone) Provide the strongest coating effect and durability but are difficult to remove, making them the main cause of build-up. A strong cleansing shampoo is required.
    • Water-soluble Silicones: (e.g., PEG-Dimethicone) Offer a lighter feel and wash out easily with water, posing a lower risk of build-up.35
    • Volatile Silicones: (e.g., Cyclopentasiloxane) Help the product spread smoothly upon application and then evaporate into the air, leaving behind a very lightweight film.36

Table 2: The Silicone Matrix: Types, Characteristics, and Considerations

Silicone TypeRepresentative IngredientKey AdvantagesPotential DisadvantagesRemoval Method
Non-solubleDimethicone, AmodimethiconeMaximum softness, shine, and coating effectHigh potential for build-upSulfate-based or deep-cleansing shampoo
Water-solubleDimethicone Copolyol, PEG-DimethiconeLight conditioning, easy to rinseRelatively weaker coating and protectionEasily removed with water or regular shampoo
VolatileCyclopentasiloxane, CyclomethiconeLightweight feel, fast-dryingMinimal conditioning effectEvaporates naturally into the air

This table can provide practical help for consumers to determine what type of silicone is in a product by reading the ingredient list and to judge whether it is suitable for their shampooing habits and hair condition. A wise approach is to understand and manage the types and properties of silicones rather than having a vague fear of the word "silicone."

4.2 The Protein Arsenal: Structural Reconstruction

The core of a treatment is protein.

  • Keratin: The main protein that constitutes hair. Hydrolyzed keratin in products works to fill the gaps in the damaged keratin structure of the hair.13
  • Amino Acids: The smallest building blocks of protein. Their very small molecular size allows them to penetrate deep into the hair to provide moisture and strengthen the structure from within.37
  • The Risk of 'Protein Overload': While protein is essential for hair, excessive use of protein-heavy treatments without adequate moisture can make the hair stiff, rigid, and prone to breakage. This is one of the main reasons why daily use of treatments is not recommended for most hair types.39

Section 5: The Optimal Hair Care Regimen: Procedure and Principles

Just as important as choosing the right product is using it in the right order and with the right frequency. An optimal usage method based on scientific principles maximizes the product's effectiveness and minimizes side effects.

5.1 The Scientific Order of Use: Shampoo → Treatment → Rinse (Answer to Q5)

The optimal order of use for maximum effectiveness is clear, and the reason is based on the principles of hair pH and cuticle opening/closing.

  1. Step 1: Shampoo: Removes impurities and oils from the scalp and hair. The slightly alkaline shampoo causes the hair to swell and opens the cuticle, preparing it to receive the nutritional ingredients of the treatment.6
  2. Step 2: Treatment: Apply to hair that has been gently towel-dried after shampooing. The low-molecular-weight nutritional ingredients penetrate into the cortex through the open cuticles. A leave-in time of 10–20 minutes is necessary for this diffusion process.1
  3. Step 3: Rinse (Conditioner): The acidic rinse restores the hair's pH to a slightly acidic state, tightly closing the open cuticles. This creates a "lock-in" effect, trapping the nutrients supplied by the treatment. Simultaneously, it forms a coating film on the surface to provide immediate softness and protection.6

Adhering to this order is crucial because if a rinse is used before a treatment, the silicone coating from the rinse will act as a barrier, fundamentally blocking the treatment's active ingredients from penetrating the hair's interior.2

5.2 Frequency and Amount: The Rationale Behind the Recommended Schedule (Answer to Q2)

There is a clear reason why rinse can be used daily, but treatment is recommended for use only 1–2 times a week.

  • Why Rinse is Used Daily: The coating effect provided by a rinse is temporary and is mostly washed away with each shampoo. It is recommended for use every time to resolve the tangles and stiffness that occur after shampooing and to protect the hair.1
  • Why Treatment is Used 1–2 Times a Week:
    • High Concentration of Ingredients: Treatments are highly concentrated with active ingredients. Daily use can lead to excessive accumulation on the hair, making it greasy or, in the case of "protein overload," stiff and brittle.1
    • Absorption Saturation Point: There is a limit to the amount of nutrients hair can absorb at one time. Using it about 1–3 times a week is sufficient to replenish lost nutrients and maintain its effects without side effects.
    • Exception: For extremely damaged, porous hair, it may be beneficial to temporarily increase the frequency to 2–3 times a week or more until the hair's condition improves.2

5.3 The Scalp Exclusion Zone: A Key Safety Rule (Answer to Q8)

The reason you should not apply rinse and treatment directly to the scalp is that these products are designed for the hair shaft, which is dead keratin tissue, not for the scalp, which is living skin tissue.1

  • Risks of Scalp Application:
    • Clogged Pores: Heavy ingredients like oils, butters, and especially non-soluble silicones in the products can clog the scalp's pores. This can obstruct sebum secretion, leading to inflammation (folliculitis), itching, and in the long term, can hinder healthy hair growth.9
    • Irritation and Blemishes: Residue left on the scalp can cause contact dermatitis or, due to excessive oiliness, can be a cause of dandruff or pimples.1
    • Reduced Volume: Applying heavy conditioning ingredients to the root area of the hair can weigh it down, reducing overall volume.

Therefore, unless a product is specifically labeled for "scalp use," all rinses and treatments should be applied from at least 2–3 cm away from the scalp, focusing on the mid-lengths to the ends, for safe and effective use.

Section 6: Decoding the Label: A Consumer's Guide

There are hair care products with various names on the market, and their price ranges vary widely. Understanding product labels correctly and knowing the reasons for price differences is fundamental to rational consumption.

6.1 Product Classification: Clarifying the Terminology (Answer to Q6)

Confusing product terms can be simplified based on their function.

  • Rinse = Conditioner: These two terms refer to functionally identical products. "Rinse" is a term that was more commonly used in the past, while "conditioner" is closer to the currently internationally accepted official name.1 Both products are primarily intended to coat the hair surface after shampooing to make it soft.
  • Treatment = Hair Pack = Hair Mask: These terms also refer to products in the same category. That is, they are a group of highly concentrated products that are left on for a certain period to supply deep nourishment to the hair.2 "Hair pack" or "hair mask" may have a nuance of having a thicker and richer texture than a general "treatment," but their fundamental purpose and usage are the same.
  • A Spectrum of Functionality: Products form a spectrum based on their intensity.
    • Lightest Level: Rinse/Conditioner (daily use, surface management)
    • Most Intensive Level: Treatment/Hair Pack/Mask (1–2 times a week, internal repair)
    • The line can be blurred as some conditioner products have added nutritional ingredients, but it is most accurate to judge based on the product's main function and recommended usage.51

6.2 The Secret of Price: What Are You Paying For? (Answer to Q10)

The price difference between rinses and treatments is primarily caused by the type, concentration, and technology of the key active ingredients.52

  • Low-Cost Products: Tend to rely on relatively inexpensive and basic ingredients. The main conditioning effect comes from common silicones like dimethicone, fatty alcohols, and basic cationic surfactants. These are effective at softening the surface but have a minimal function in substantially improving the hair's interior.54
  • High-Cost Products: The reason for the higher price is the use of more expensive and higher-performing ingredients.
    • High-Functionality Proteins: Often contain a high concentration of low-molecular-weight proteins (LPP), which have superior penetration power but are expensive to produce.55
    • Patented Ingredients and Special Raw Materials: Differentiate themselves by using proprietary patented ingredients backed by efficacy research, rare plant extracts, and high-purity vitamins.61
    • Sophisticated Formulas: Use more luxurious and less irritating emulsifiers, fragrances, and preservatives, and increase the proportion of active ingredients by excluding unnecessary fillers.
    • Brand Value and R&D Costs: The brand's reputation, marketing, packaging, and the research and development costs invested in developing new technologies and ingredients are also reflected in the price.

In conclusion, the price difference is often not just a matter of branding but is determined by the inclusion of high-functionality raw materials that substantially contribute to hair improvement and the technology behind them.

Section 7: Customized Recommendations and Advanced Considerations

Everyone's hair condition is different, so a flexible approach tailored to one's own hair condition is needed rather than a one-size-fits-all rule.

7.1 Healthy Hair: Is Treatment Necessary? (Answer to Q9)

For someone with healthy, non-chemically treated hair, a treatment is not essential, but it is beneficial from a preventive standpoint.

  • Necessity: Healthy hair has a well-sealed cuticle and minimal internal protein loss, so a daily rinse/conditioner may be sufficient to manage tangles and protect the surface.
  • Preventive Effect: However, all hair is exposed to daily stressors like UV rays, fine dust, and heat from dryers. Using a treatment periodically (e.g., 1–2 times a month) is like "preventive maintenance" that replenishes protein and moisture before this minor damage accumulates. This helps to maintain the healthy state of the hair for longer and builds resistance to future damage.3

7.2 Damaged Hair: Why Isn't Rinse Alone Enough? (Answer to Q7)

Using only a rinse on damaged hair cannot be a fundamental solution. This question also summarizes the core message of the report.

  • A rinse can temporarily make hair look soft and healthy by covering the roughened cuticle with a silicone film.2
  • However, this does not address the root cause of the problem: the loss of protein and moisture from inside the cortex.3 The structural weakness remains.
  • Using only a rinse on damaged hair is like covering a broken table with a pretty tablecloth. It may look fine on the surface, but the table's fundamental instability is not resolved. For true improvement, the internal structure (the table legs) must first be reinforced with a treatment, and then the external surface (the tablecloth) should be protected and finished with a rinse.

7.3 Final Recommendations by Hair Type

  • Fine and Oily Hair: Use a rinse daily, but apply it lightly, focusing on the ends. Use a lightweight treatment once a week or once every two weeks to provide nutrition without weighing the hair down.39
  • Thick and Dry Hair: Use a highly moisturizing rinse daily. Use a rich, concentrated treatment or hair mask 1–2 times a week to maintain flexibility and moisture.39
  • Damaged/Chemically Treated Hair: Follow the full "Shampoo → Treatment → Rinse" routine at least twice a week. Depending on the hair's condition, it is ideal to alternate between a protein-based treatment (for strengthening) and a moisture-based treatment (for flexibility) to maintain a protein-moisture balance.39 Choosing a product containing LPP ingredients can maximize the damage repair effect.

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  19. [기고] 케라틴 펩타이드와 코스메슈티컬 화장품 - 약업신문, 9월 10, 2025에 액세스, http://m.yakup.com/news/index.html?mode=view&nid=279340
  20. 트리트먼트, 꼭 해야 하는 이유 : 자료실 - 벨모어, 9월 10, 2025에 액세스, https://www.bellemore.co.kr/Resources/?bmode=view&idx=148725786
  21. 상품문의-[Re] LPP와 PPT 차이가 뭐예요?[답변완료] - 아이엠스토어, 9월 10, 2025에 액세스, https://www.imstore.co.kr/m/board.html?code=aaii_board3&page=1&type=v&board_cate=&num1=999695&num2=10000&s_id=&stext=&ssubject=&shname=&scontent=&branduid=1237410&search_type=one_product&number=1&lock=N
  22. 미용실 트리트먼트 PPT 와 LPP 차이는 뭘까? - YouTube, 9월 10, 2025에 액세스, https://www.youtube.com/watch?v=yFkSbTc2AUU
  23. ppt와lpp는 이렇게 달라요^^ - YouTube, 9월 10, 2025에 액세스, https://www.youtube.com/watch?v=zHUYxOALQE0
  24. 샴푸 후 린스 vs 트리트먼트, 어떤 것을 사용해야 할까? - 하이닥, 9월 10, 2025에 액세스, https://news.hidoc.co.kr/news/articleView.html?idxno=33174
  25. 린스 vs 트리트먼트 먼저 사용해야 하는 것은? 올바른 사용법 알려드림, 9월 10, 2025에 액세스, https://www.allurekorea.com/2023/05/30/%EB%A6%B0%EC%8A%A4-vs-%ED%8A%B8%EB%A6%AC%ED%8A%B8%EB%A8%BC%ED%8A%B8-%EB%A8%BC%EC%A0%80-%EC%82%AC%EC%9A%A9%ED%95%B4%EC%95%BC-%ED%95%98%EB%8A%94-%EA%B2%83%EC%9D%80-%EC%98%AC%EB%B0%94%EB%A5%B8-%EC%82%AC/
  26. 고객 문의(Q&A)-실리콘 성분 - 이안솝, 9월 10, 2025에 액세스, https://www.eansoap.com/m/board.html?code=gooworl102&page=41&type=v&board_cate=&num1=976143&num2=00000&number=23067&lock=N
  27. 린스는 어떻게 작동하고, 왜 쓰는 거야? : r/askscience - Reddit, 9월 10, 2025에 액세스, https://www.reddit.com/r/askscience/comments/wirosz/how_does_hair_conditioner_work_and_why_do_we_use/?tl=ko
  28. 헤어 컨디셔너, 린스, 트리트먼트 차이점은? … - 뷰티트래블뉴스, 9월 10, 2025에 액세스, http://www.beautytravelnews.com/news/view.html?section=9&category=137&no=1986
  29. 탐스러운 머릿결의 배신, 실리콘 들어간 샴푸 탓? - 헬스조선, 9월 10, 2025에 액세스, https://m.health.chosun.com/svc/news_view.html?contid=2013112802234
  30. 내가 쓰는 샴푸, 화장품에 유해 실리콘 성분이..? 실리콘에 대한 잘못된 지식 바로잡아드립니다! (피부과 전문의 노성민) - YouTube, 9월 10, 2025에 액세스, https://www.youtube.com/watch?v=GhVWVx9RukA
  31. Q: 무실리콘 샴푸의 장점? #1.화장품정보사이트 ifacemaker.com****, 9월 10, 2025에 액세스, http://www.ifacemaker.com/board2_view.php?aq_type=AWhairbody&aq_id=2426
  32. 실리콘 샴푸로 탈모를 - M3D공식쇼핑몰-아름다운 머릿결과 건강한 두피를 약속합니다-, 9월 10, 2025에 액세스, https://m.m3dmall.com/board/free/read.html?no=32&board_no=7&page=1
  33. 무실리콘 샴푸란?샴푸의 기초지식 - M3D공식쇼핑몰-아름다운 머릿결과 건강한 두피를 약속합니다-, 9월 10, 2025에 액세스, https://m.m3dmall.com/article/%EC%83%B4%ED%91%B8%EC%9D%98-%EA%B8%B0%EC%B4%88%EC%A7%80%EC%8B%9D/7/20/
  34. KR101172733B1 - 무실리콘 투명겔상의 모발 및 두피 보습 영양트리트먼트제 조성물, 9월 10, 2025에 액세스, https://patents.google.com/patent/KR101172733B1/ko
  35. 실리콘이 천연 모발에 그렇게 안 좋은 건가? : r/Naturalhair - Reddit, 9월 10, 2025에 액세스, https://www.reddit.com/r/Naturalhair/comments/qbolmj/are_sillicones_all_that_bad_for_natural_hair/?tl=ko
  36. 실리콘에 대한 오해와 진실 - 더시그니처매거진, 9월 10, 2025에 액세스, https://www.signaturemg.co.kr/news_view.php?idx=2231&cate=&cate_sub=
  37. 시그니처 케라틴 단백질 크림 클리닉 트리트먼트 (베이비파우더향, 600ml) - 다봉쓰, 9월 10, 2025에 액세스, https://m.dabongss.com/product/%EC%8B%9C%EA%B7%B8%EB%8B%88%EC%B2%98-%EC%BC%80%EB%9D%BC%ED%8B%B4-%EB%8B%A8%EB%B0%B1%EC%A7%88-%ED%81%AC%EB%A6%BC-%ED%81%B4%EB%A6%AC%EB%8B%89-%ED%8A%B8%EB%A6%AC%ED%8A%B8%EB%A8%BC%ED%8A%B8-%EB%B2%A0%EC%9D%B4%EB%B9%84%ED%8C%8C%EC%9A%B0%EB%8D%94%ED%96%A5-600ml/9/
  38. 미용사가 추천하는 헤어트리트먼트 올바른 사용방법 INFORMATION - 코츠비(COTSBI), 9월 10, 2025에 액세스, https://m.cotsbi.com/article/information/12/2433/
  39. ‍♀️ 트리트먼트를 매일 해도 될까? - 재능넷, 9월 10, 2025에 액세스, https://www.jaenung.net/tree/20713
  40. 컨디셔너 vs 린스 vs 트리트먼트, 대체 뭐가 다를까? - 헬스조선, 9월 10, 2025에 액세스, https://m.health.chosun.com/svc/news_view.html?contid=2024090502400
  41. 트리트먼트를 매일 하는 것이 머릿결에 좋을까요? 머리카락이 더 잘 빠지는 이유는? - 닥터나우, 9월 10, 2025에 액세스, https://doctornow.co.kr/content/qna/b0d385b05bb4437a8d7b082a543d865a
  42. 트리트먼트 VS 헤어팩 - 에누리 쇼핑지식 쇼핑Q&A, 9월 10, 2025에 액세스, https://m.enuri.com/knowcom/detail.jsp?kbno=504686&bbsname=qna
  43. 머릿결 좋아지려 쓰는 트리트먼트… '이렇게' 쓰다간 염증 위험 - 헬스조선, 9월 10, 2025에 액세스, https://m.health.chosun.com/svc/news_view.html?contid=2024052301795
  44. 린스 (r44 판) - 나무위키, 9월 10, 2025에 액세스, https://namu.wiki/w/%EB%A6%B0%EC%8A%A4?uuid=ddadcab6-6ac1-474d-a42d-ba75dfe9da2e
  45. [두피케어TIP] 린스, 두피에 닿으면 탈모에 영향을 줄까? : Dr.Graft ｜ Scalpcare_TIP, 9월 10, 2025에 액세스, https://drgraft.co.kr/Scalpcare_TIP/?bmode=view&idx=8336447
  46. 공지사항- 잘못 알고 있는 헤어케어 상식!!!, 9월 10, 2025에 액세스, https://www.hairbest.com/m/board.html?code=hairbest_board4&page=8&type=v&num1=999952&num2=00000&number=48&lock=N
  47. 린스 사용 땐 가급적 두피에 닿지 않게 - 감사나눔신문, 9월 10, 2025에 액세스, https://www.gamsanews.co.kr/news/articleView.html?idxno=18099
  48. m.health.chosun.com, 9월 10, 2025에 액세스, https://m.health.chosun.com/svc/news_view.html?contid=2022123001123#:~:text=%EB%A6%B0%EC%8A%A4%EB%8A%94%20%EC%BB%A8%EB%94%94%EC%85%94%EB%84%88%EC%99%80%2C%20%ED%97%A4%EC%96%B4,%EC%9C%BC%EB%A1%9C%20%EC%98%81%EC%96%91%EB%B6%84%EC%9D%84%20%EA%B3%B5%EA%B8%89%ED%95%9C%EB%8B%A4.
  49. 헤어컨디셔너?? 트리트먼트?? 대체 뭘써야하지?? - YouTube, 9월 10, 2025에 액세스, https://www.youtube.com/watch?v=d-Bz5BiFPjw
  50. 린스, 컨디셔너, 트리트먼트, 헤어팩… 다양한 헤어 제품, 뭐가 다를까? - 헬스조선, 9월 10, 2025에 액세스, https://m.health.chosun.com/svc/news_view.html?contid=2016060701841
  51. 린스, 트리트먼트, 컨디셔너 차이 / 헤어 제품 총정리, 9월 10, 2025에 액세스, https://atoclaus.tistory.com/entry/%ED%97%A4%EC%96%B4%EC%A0%9C%ED%92%88%EC%A0%95%EB%A6%AC
  52. "같은 브랜드 미용실인데…가격은 왜 달라요?" [수민이가 궁금해요] - Daum, 9월 10, 2025에 액세스, https://v.daum.net/v/20240514141523393
  53. 트리트먼트 10㎖당 가격 116원에서 2600원까지…최대 22배 차이나 - Daum, 9월 10, 2025에 액세스, https://v.daum.net/v/qQdXPnJq6s
  54. 트리트먼트 사용시 주의점샴푸의 기초지식 - M3D공식쇼핑몰-아름다운 머릿결과 건강한 두피를 약속합니다-, 9월 10, 2025에 액세스, https://m.m3dmall.com/article/%EC%83%B4%ED%91%B8%EC%9D%98-%EA%B8%B0%EC%B4%88%EC%A7%80%EC%8B%9D/7/270/
  55. [특가/대용량] 아브카 극손상 케어 LPP 단백질 헤어팩 저자극 트리트, 9월 10, 2025에 액세스, https://tmon-ad.oasis.co.kr/product/detail/109385-1185840
  56. [대용량] 바디브 저분자 단백질 LPP 트리트먼트 1000ml 극손상 케어용 미용실, 9월 10, 2025에 액세스, https://ko.aliexpress.com/item/1005007620031618.html
  57. [강다니엘PICK/열보호]박준뷰티랩 LPP 단백질 노워시 트리트먼트 200ml+80ml 리브인(기획/단품) 손상모헤어팩 | 올리브영, 9월 10, 2025에 액세스, https://www.oliveyoung.co.kr/store/goods/getGoodsDetail.do?goodsNo=A000000172064
  58. [특가/대용량] 아브카 극손상 케어 LPP 단백질 헤어팩 저자극 트리트먼트 1000ml, 9월 10, 2025에 액세스, https://m.oasis.co.kr/product/detail/109385
  59. [박준뷰티랩] 박준 LPP 단백질 헤어 에센스 오일 105ml - 마켓컬리, 9월 10, 2025에 액세스, https://www.kurly.com/goods/1000427912
  60. 엘피피/피피티/트리트먼트/클리닉 - 헤어2000, 9월 10, 2025에 액세스, https://m.hair2000.co.kr/product.html?cate=2&category=2-20
  61. 댕기머리, 9월 10, 2025에 액세스, https://doorimall.net/
  62. MEDAVITA 공식 스토어 | 프리미엄 헤어케어, 9월 10, 2025에 액세스, https://medavita.co.kr/
  63. Women - "기능성 화장품 No.1" 리스킨, 9월 10, 2025에 액세스, https://www.reskin.co.kr/m/product_list.html?type=N&xcode=053&mcode=001
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