actually a chemical straightener is completley different from the Japanese
method, they are two different chemicals altogether, and you are righ NY angel, the straightener you did is very damaging, it is intended for african american hair but had been used for caucasian hair because it was all we had at the time. The Japanese straighteners are Thyogloclate based, same main ingredient in Perm solutions. Chemical relaxers are sodium hydroxite, basically Lye!! Very harsh on the hair!!! The Japanese method is Thyo and proteins and collagens. How it works is the solution breaks down the protein bonds in your hair, whether they are curly, wavy or frizzy, or all of the above. When it has processed sufficiently it is rinsed out then conditioned. Then you blow dry about 80 to 90%. then the flat ironing process begins, that is what really makes the hair straight!! After that is done you neutralize, rinse and condition again and then dry. I have been having it done for 5 years and my hair is long and I color...but like any chemical process it does depend on your hair to begin with. If you have fragile hair and are prone to breakage, then maybe it is not for you. It is not recommended for those with heavy highlights either.
Its best to go for a consultation and ttry and chose someone with a fair amount of experience. Ask alot of questions, alot of my clients do alot of research on the net before they even come to me!!
hope this helps