works well, no bleeding noted when used.
Tried using these on a dark gray cookie and it was horrible. Even after shaking, shaking, it still went on very runny and clear, only leaving a faint white margin on both sides of where marker was used. I bought two of these pens and regret the expense.
Fun to use on a cookie chalkboard
I use it to lighten a dark painted color. I used it on an Iris petal to give a little definition. Made all the difference.