Image is embossed to retain the lines, use a brush you won't need again and brush on undiluted bleach. When the bleach is dry, colour one of the leaves with H20 to bring it out and give it dimension.
The trick is to use an inferior quality card stock, usually found in Australian newsagents, good quality card stock will not bleach well. Or if you look at a piece of card stock side on you will see the middle is a different colour, that is the best card stock to use.
Linking up to One Layer Card