Answer:
20-40 minutes.
Step-by-step explanation:
*DISCLAIMER* I am getting my info from CERTIFIED hair specialists.
OK especially since your hair is curly, I would recommend using treatments before and after your bleach. In fact, I wouldn't really recommend going for bleaching your hair. There are many hair products that can lighten you hair gently though it may not be as light as bleach. Right now you are chemically altering your hair's porosity so you have to be sure you can take care of it right. If you have any questions please comment down below.