Hair-Straightening Treatment at Zen Hair Fashion (54% Off)

$155
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$340 54% $185
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In a Nutshell

Japanese straightening treatments nourish, smooth, and straighten locks

The Fine Print

Promotional value expires 120 days after purchase. Amount paid never expires. Not valid for clients active within the past 12 months. Appointment required. Limit 1 per person. Valid only for option purchased. Additional fees may apply for hair past shoulders, texture, and density. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.

The Deal

  • $155 for a Japanese hair-straightening treatment ($340 value)

Japanese Straightening: Chemistry of the Curl

Unlike a flat-iron or keratin treatment, Japanese straightening permanently removes hair’s curl. Find out how in this Groupon guide.

Curly hair is caused by genetics, of course, but it’s also caused by some basic chemistry. Ringlets, kinks, and waves arise when pairs of sulfur atoms in the amino acid cysteine link up together, forming, appropriately enough, disulfide bonds. (There’s a lot of cysteine in hair because it’s one of the major building blocks of keratin, the protein that makes up most of the hair shaft.) During this process, each of the sulfur atoms sheds an electron, and that’s what allows one of the most reliable techniques for straightening hair to work.

During Japanese hair straightening, a reducing agent—in this case a chemical known as thioglycolate—forces electrons back onto the sulfur atoms, reversing the process that created the bond. After the hair is nourished with shampoo and a protein-rich conditioner, the stylist will apply a solution of thioglycolate that’s activated by the heat of a dryer. A flat-iron then makes hair as straight as possible before a chemical neutralizer tells the thioglycolate to stop processing and keeps the hair in its new shape.

The process often takes three to four hours, and clients shouldn’t style or wash their hair for about three days afterward to avoid disrupting the treatment or losing that nice salon smell sooner than necessary. The chemical reaction is permanent, and changes the actual structure of the hair—that’s why Japanese-straightened hair won’t curl again the way keratin-smoothed or flat-ironed hair eventually does, at least until it grows out. At that point, if you want to maintain the sleek look, you can go back to the salon to touch up the roots.

Customer Reviews

I have extremely thick & long hair. Caitlyn did an amazing job, it's sleek, shiny & frizz free. I had such a great experience that I came back for a hair treatment. Awesome find and quality.
Rizza T. · July 24, 2017
Surprisingly positive experience. Stylists here seem skilled and professional. Overall happy with the salon. The actual straightening didn't take 100% but they did tell me that beforehand due to my hair condition. Tip: Ask to have hair flat ironed a second time and not just blown out to get all moisture out to really set the hair.
KT C. · May 30, 2017
ANDY WAS VERY GOOD.
Robbin S. · May 7, 2017

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