I saw a show on HGTV where they used bleach to make a design on denim. On the show, they used a solution of equal parts water and bleach, sprayed it over a metal trivet, removed the trivet and then stopped the bleaching action. However, they didn’t say how to stop the bleaching action. How can I use this method without ruining or weakening the material?
I haven’t seen the HGTV show that you mentioned, so I am not familiar with the process they used/recommended.
Here’s part of a response that I wrote for using liquid bleach to make “designer jeans,” which should be similar to the process you are attempting:
If you want to lighten certain areas only, then use Clorox® Bleach Pen Gel. The fine-point tip and scrubber tip offer two different applicators for designs and coverage.
I would be also be careful using a metal trivet, as these can react with the bleach and deposit some unwanted colors.