Semi-Permanent Straightening-


Top 7 Need-To-Know Facts-

1. Not for pregnant or nursing women

2. No consultation needed

3. Color should be done before straightening, ideally 1 week before. Or, if absolutely necessary, 2 weeks after.

4. Wait period is 48 hours before first wash

5. Hair should remain 100% free of product and moisture during the wait period

6. Sodium Chloride(AKA-Salt, Sea Salt, NaCl ) dissolves treatment off of hair. All products used on hair must be salt free.

7. This service takes differently to everyone. Your first treatment is an experiment for you to see how it goes for you personally


Semi-permanent straightening refers to all non-bond breaking treatments. These treatments tend to wear completely off over time. There are many brands of this technology. These treatments go by many names: Brazilian Straightening, Keratin Treatments, BKT, KT, Brazilian Thermal Straightening, Smoothing Treatments, Non-keratin Smoothing, temporary straightening, Brazilian Blowouts, etc. This technology will be referred to as SP-S from now on. Permanent Straightening will be referred to as PS.

SP-S only overrides bonds, as opposed to permanently breaking them. All other forms of straightening prior to this technology, and outside this technology, intentionally break bonds and ALWAYS leave the hair less resistant to future damage in some capacity. The process of a SP-S involves the application of solution to the hair strand, which adheres by way of a "heat-set" using a flatiron or blowdryer. SP-S absolutely does not cause damage to the hair, other than potential flatiron damage if a stylist is not careful. The treatment puts a protective layer on the surface that protects the cuticle from regular abuse and truly preserves the hair like nothing else. Clients whose hair started splitting at shoulder length might be able to get mid-back length before seeing splits start.

SP-S can be done on top of all other bond-breaking services including all PS services (hydroxide based straighteners, ammonium thio based straighteners) and all color services (bleach, high lift color and regular color). It can be combined with PS when extreme porosity differences exist. For example, highlighted crown area/ virgin curly nape area. Nape would be PS'd, highlighted areas would be SP-S'd.

The service takes between 1 and 4 hours. After the hair has been treated, there is a 0-4 day waiting period before it can be washed, depending on what brand is used. The brand used at UnSprung requires a 2 day wait period. Despite the fact that manufacturers recommend avoiding ponytails, clips, tucking of the hair, etc... before the first wash, there is no evidence to back this up, if the hair is kept 100% dry. Clients of UnSprung were challenged to find a way to leave a mark in the hair through any mechanical means possible, and not one client could. Hair was ponytailed, micro-braided, clipped, bunned, corn-rowed, never smoothed out during the wait period, and no impression was ever left. At this point, it is safe to say, anything goes. However, all products, sweat, water, or any other chemistry should be totally avoided before the first wash. Once the hair can be washed, only products that DO NOT contain sodium chloride should be used since sodium chloride dissolves the keratin. Other names for sodium chloride are: sea salt, salt, and NaCl.

SP-S can last anywhere from 6 weeks to permanently. The range is huge, and each client's hair takes it differently. If there was such a thing as "average-longevity" with this treatment, it might be @ 4 months. Typically, it sticks better to hair that is more porous. But, hair that is severely damaged or split will not typically hold very well. SP-S sticks to cuticle. Hair that is split, lacks a good cuticle layer.  SP-S has an accumulative effect with multiple treatments resulting in longer lasting and increased smoothness. About 80% the time, one treatment is sufficient. The initial straightness and rate of reversion will be different on every head of hair. The first time a client books a S-PS, they should think of it as an experiment because results completely vary from person to person.

A very unique styling aspect of the SP-S is the fact that the treatment is “heat maximized”. If the hair is air-dried(no heat), there will likely be some wave. If the hair is blown dry(with heat), it will usually smooth out. It usually takes heat to achieve the maximum straightness of style. And multiple straightening treatments helps to increase straightness for both air-dried and blown dried hair. 

Color Info

According to the manufacturers, color can be done on the same day, before the SP-S. In general, consider SP-S a "top coat". You do not want to do anything over the top of it, or else it could be compromised. If color were to be done after the SP-S, it would likely remove some of the treatment. When color is needed again, no SP-S will be compromised if only the roots are colored, and there is no overlapping onto the SP-S'd hair. SP-S can lift artificial color a couple shades. Some clients darken their hair formula to account for the lightening affect. It has been observed that color lifts/changes less with a week waiting period between color and straightening. This gives the color time to oxidize, making it more stable and less affected by the S-PS process. The S-PS does not affect natural hair color, however, it can impart a yellow tinge to light colored hair when processed at the prescribed temperature. This yellow fades, but can become slightly darker and longer lasting with repeated treatments. This can be avoided by lowering the processing temperature, but this also potentially shortens the longevity.

New technologies typically stir up controversy, and this technology is no exception. All chemical services in the salon potentially have negative affects for the client and/or the environment. There is absolutely no such thing as a "chemical-free" chemical service. The criticism surrounding the SP-S specifically, resulted in more public testing of this technology than any other chemical service in the salon. It was scrutinized by environmental watchdog groups, which led to the reformulations being used currently. For more detailed info, visit the blog.

Because of the overall simplicity of SP-S, it's likely to be offered in many salons. The benefit that UnSprung will provide, above and beyond other salons, has been and will always be the attention to personal safety, the complete commitment to quality and customer satisfaction, and the constant investigation of new technologies in the field of hair straightening services. Potential new products are put through comparative tests with competing products, on the same head of hair, to determine best performance. This means that 2 competing products are tested by applying one brand to the left side of the client's head, and the other brand is applied to the right. All products tested are listed on the "Bio" section.