If you've been battling frizzy, unmanageable hair, you've likely researched various salon treatments. The two most popular contenders that frequently emerge are Hair Smoothing and Keratin Treatments. Both promise to transform your unruly locks into sleek, glossy perfection. However, they achieve this in fundamentally different ways, and choosing the wrong one can lead to unsatisfactory results or unnecessary damage.
At Bombay Beauty, our master stylists perform these treatments daily. To help you make an informed decision and achieve the hair of your dreams, we have crafted this comprehensive guide comparing Hair Smoothing and Keratin Treatments. We’ll break down exactly what each treatment is, how it works, and who it is best suited for.
What is Hair Smoothing?
Hair Smoothing, sometimes referred to as hair rebonding or permanent straightening, is a chemical process that alters the structure of your hair. This treatment breaks down the natural disulfide bonds in your hair—which determine whether your hair is straight, wavy, or curly—and restructures them so that the hair becomes perfectly straight.
The Process
The process typically involves applying a strong chemical relaxer to break the bonds, followed by a neutralizer to set the hair in its new, straight shape. The stylist will often use a flat iron during the process to lock in the straightness. The entire procedure can take anywhere from 3 to 6 hours, depending on the length and thickness of your hair.
Pros of Hair Smoothing
- Permanent Results: The hair that has been treated will remain straight permanently. You will only need to touch up the new growth at the roots every 4 to 6 months.
- Pin-Straight Look: If you desire incredibly straight, "glass-like" hair with zero waves, smoothing is the way to go.
- Eliminates Frizz Completely: Because the structure is permanently altered, humidity will no longer cause your hair to frizz.
Cons of Hair Smoothing
- Chemical Damage: The chemicals used are strong and can be harsh on the hair cuticle. If your hair is already heavily bleached or damaged, smoothing is usually not recommended as it can lead to severe breakage.
- Loss of Volume: Because the hair is rendered completely straight and flat, you will lose significant natural volume and bounce.
- Awkward Grow-Out Phase: As your natural wavy or curly hair grows in at the roots, there will be a noticeable contrast between the new growth and the treated lengths.
What is a Keratin Treatment?
Unlike hair smoothing, a Keratin Treatment is not a permanent structural change. Keratin is a natural protein that makes up about 90% of your hair. A Keratin Treatment (sometimes called a Brazilian Blowout) works by infusing your hair with a liquid keratin blend, essentially filling in the porous gaps in your hair cuticles that cause frizz and dullness.
The Process
The stylist washes your hair with a clarifying shampoo to open the cuticles. The keratin solution is then applied meticulously to every strand. The hair is blow-dried and flat-ironed at a high temperature to seal the keratin into the hair shaft. This process generally takes 2 to 4 hours.
Pros of Keratin Treatments
- Healthier-Looking Hair: Because you are injecting protein back into the hair, it looks significantly healthier, shinier, and more vibrant.
- Retains Natural Texture: Keratin treatments eliminate frizz but do not permanently break the bonds of your hair. If you have curls, you will still have curls, but they will be softer, looser, and frizz-free. If you want it straight, it makes blow-drying it straight incredibly easy.
- Fades Gradually: The treatment washes out slowly over 3 to 6 months. This means there is no harsh line of demarcation when your roots grow out.
- Safe for Color-Treated Hair: In most cases, keratin treatments are perfectly safe for color-treated or bleached hair; in fact, they often help lock in the color and repair prior damage.
Cons of Keratin Treatments
- Not Permanent: You will need to repeat the treatment every few months to maintain the results.
- Specific Aftercare Required: You must use sulfate-free and sodium chloride-free shampoos to prevent stripping the keratin from your hair prematurely.
- Temporary Smell/Fumes: Some traditional keratin formulas release fumes during the flat-ironing process, although modern, formaldehyde-free formulas are much more pleasant.
Which One is Right for You?
Choosing between the two depends entirely on your natural hair type, its current condition, and your ultimate hair goals.
Choose Hair Smoothing If:
- You have very thick, coarse, and unruly curly hair that you want to be permanently, pin-straight.
- You do not want to spend any time styling your hair with heat tools on a daily basis.
- Your hair is virgin or relatively healthy and has not been heavily processed with bleach.
Choose a Keratin Treatment If:
- You want to eliminate frizz and add incredible shine, but you still want to keep some of your natural volume, waves, or curls.
- Your hair is damaged, highlighted, or color-treated, and you need a treatment that acts more like a deep conditioning repair mask.
- You want a lower-commitment treatment that gradually fades out without a stark contrast at the roots.
- You don't mind blow-drying your hair quickly to activate the sleekness.
The Final Verdict
Both treatments offer excellent solutions for unmanageable hair, but they serve different purposes. Hair smoothing offers permanent, absolute straightness at the cost of potential chemical stress. Keratin offers a restorative, frizz-free finish that requires maintenance but preserves hair health and versatility.
Still unsure which path to take? The best approach is a professional consultation. At Bombay Beauty, our expert stylists will assess your hair's elasticity, porosity, and history to recommend the perfect treatment tailored specifically to you. Contact us today to book your consultation and take the first step towards flawless hair!
Frequently Asked Questions (FAQs)
Can I get a keratin treatment if my hair is colored?
Yes! In fact, a keratin treatment is highly recommended for color-treated hair. It seals the hair cuticle, which locks in the color, prevents fading, and repairs the chemical damage caused by the dye.
Will hair smoothing cause hair fall?
Hair smoothing uses strong chemicals to break hair bonds. If done incorrectly, or if the hair is already fragile, it can cause breakage. However, professional smoothing does not cause hair to fall from the root (alopecia) unless the chemicals are improperly applied directly to the scalp and cause chemical burns.
When can I wash my hair after the treatment?
For traditional keratin treatments and hair smoothing, you typically must wait 48 to 72 hours before washing your hair, tying it up, or sweating excessively. However, there are newer "express" keratin formulas that allow you to wash your hair the very same day.
Post-Treatment Care & Maintenance
To ensure your treatment lasts as long as possible and your hair remains healthy, follow these strict guidelines:
- The First 72 Hours: Keep your hair completely straight and dry. Do not tuck it behind your ears, use clips, hair ties, or wear hats. If it gets wet, blow-dry and flat iron it immediately.
- Sulfate-Free Only: You must switch to a shampoo and conditioner completely free of sulfates and sodium chloride (salt).
- Silk Pillowcases: Sleep on a silk or satin pillowcase to reduce friction, which prevents frizz and prolongs the life of the treatment.
- Avoid Salt and Chlorine: Ocean water and swimming pool chlorine will quickly degrade keratin and smoothing treatments. If you must swim, coat your hair in a thick leave-in conditioner first and wear a swim cap.
Expert Tips from Bombay Beauty Stylists
Honesty is Crucial: "Before any chemical treatment, you must be 100% honest with your stylist about your hair history. If you've used box dye, henna, or bleach in the last two years, we need to know. Applying smoothing chemicals over henna or heavy bleach can cause the hair to literally melt off."
Invest in the Right Shampoo: "If you pay for a premium keratin treatment and then wash it with a cheap drugstore shampoo containing sulfates and sodium chloride, you will strip the treatment out in two weeks. Always invest in the professional aftercare products your stylist recommends."
