Rinse the shirt thoroughly with cold water to stop the bleaching process.
Wash the shirt separately in a washing machine using cold water to remove any remaining bleach.
Hang the shirt on a hanger or clothesline to air dry completely.
There are many variations you can try with this DIY project to make it your own. Experiment with different flannel colors, such as green and black or blue and black, to see how the bleach reacts with each hue. For a more dramatic effect, try using a stronger bleach solution or leaving the shirt in the bleach for a longer period. You can also create patterns by tying parts of the shirt with rubber bands before bleaching, similar to a tie-dye technique. Remember to always work in a well-ventilated area and test a small, inconspicuous part of the fabric first to avoid any unwanted results.