There are different techniques to preserve fresh flowers. Probably the best known method is to leave them to dry by dehydrating naturally, placing them face down. Once completely dry, they can undergo a colouration and setting treatment so that they regain some of their original appearance.
Flowers that have undergone this treatment can be used to make certain types offloral decoration, generally those with a rustic or simple appearance.
However, dried plants are not very long-lasting. Their branches and stems break easily, the colour gradually fades and the petals fall off or break.
Preservation is also a form of drying, although it is much more sophisticated. The result is completely different. The preservation technique allows flowers to maintain a completely natural appearance and feel, as if they were freshly-cut flowers!