There is something wonderful about the papery quality of pressed leaves. Some become almost transparent. They retain their colour as long as they're not left in direct sunlight. A great reminder of how colourful the world is when you're in the depths of January and feel like the world will stay brown and grey forever. They smell great, a bit like a barn full of newly cut hay.
The best time to pick and press leaves is in early spring before they've had holes eaten
in them by caterpillars.