Is there any other way to straighten your hair besides ion perm? Please be specific!

This is a nursing method. It's like an ionic perm. But the potion is different. Doses are different. And the key is not to hurt your hair ~ ~ ~

I feel soft and slippery after I finish. . It seems to explain the name) and it is very bright. Much straighter. Of course at that time. But not as straight as ion ironing. I should say it looks natural. I just made it recently ~ ~