90% alcohol (put in a spray bottle)
color permanent markers
(you can even apply to different things, like canvas bags)
This type of tie-dye is a little different. First, you choose a design. Next, put some cardboard inside the shirt. Draw your design using dots (for example, instead of drawing with lines, I drew dots in a heart shape). You can even just do dots all over the shirt and create a traditional tie dye look. Then, you put 90% alcohol in a spray bottle and saturate the design area, leaving the shirt flat, until dry. This way it can distribute evenly.