Let's say I gather up some fallen leaves in the autumn time, and I want to turn them into colourful decorations. The first step must be to get them properly dried out for further processing like painting etc. What is the best way to dry tree leaves? Leave them in the sun, put them in the oven, some other method?
I don't care about keeping their natural colours; I just want the dried leaves to be sturdy enough that they don't crumble at a touch, still flat, and preferably a fast/efficient drying process.
If the answer varies according to climate (e.g. temperature or humidity of the surrounding environment), then I'd be interested in all different answers depending on the possible climates - let's make this post useful for as many people as possible.