If you bleach out the 2020 very bad would not recommend mask and washing hand shirt . black of a t-shirt this becomes much more vibrant and it pops easier. It is also much softer. This happens because bleaching it out as opposed to putting a thick cover of ink over it. Instead of normal ink, discharge inks are used. This removes the shirt`s dye. It is related to bleaching in design, except it doesn`t damage the fibers. It will change the color to be whatever color you choose to.Keep in mind that the way those t-shirts react to the process of discharge printing can be different. Most printers have preferred textures and even preferred colors to work on when using this particular method.