I would recommend the silica gel method, as it would preserve your Orchids in 3-dimension retaining the unique form as well as color. This link has good info if you scroll down to SilicaGel. It can be purchased at hobby shops for about $10, and can be re-used for years. Once you start, you'll find lots of flowers you'll enjoy experimenting with. Good luck. josh

Here is a link that might be useful: Drying Flowers