Problem description:

My friend's hair is naturally curly. He tried to straighten it, but it was still short. I heard that there are some medicines that can straighten it. Who knows what it is?

Analysis:

These agents are collectively referred to as "ion direct action agents" and are divided into the following categories:

(1) Negative ion hair straightener: The effect of hair straightener is the best, but after use, the hair will become much drier than before, which is not suitable for dry hair. Suitable for oily hair.

(2) Free hair straightener: It has the effect of torch oil, but the effect of hair straightener is average. Oily hair is best used with caution.

(3) Cationic hair straightener: The effect of hair straightener is natural and not exaggerated. Suitable for neutral and neutral oily hair.

(4) Water ion direct hair exposure: The direct hair effect is very good, and it is also the most natural. This product has a good hydrating effect on hair, especially suitable for dry hair and neutral hair.

(5) Ceramic water ion direct hair dew: It is an upgraded product of water ion direct hair dew, which has better hydrating effect but is more expensive.

(6) Grey ion hair straightener: It is a relatively new product, and its hair straightening effect is similar to that of water ions, but it is relatively dry. But the price is cheaper than water ions.

(7) Frozen hair tonic: hydrating hair tonic, with average effect and average duration.

The above is the introduction of the types of straight hair dew. As for the brand, there are domestic and imported brands, depending on your personal preference. The same potion, if the brand is different, then the price will be different.