When the leaves have soaked for 3 days, carefully take them out and pat them dry between sheets of paper towels. Your leaves are now preserved and the amazing part of this method is that the leaves should maintain their flexibility! What's going on? When you preserve a leaf with glycerin, you're replacing some of the water in the leaf with the glycerin solution. As the leaf dries, the water evaporates but the glycerin remains behind. This helps to maintain the leaf's texture and flexibility, so you can display it for a lot longer!