Probably the main reason I love Lomography and shooting film so much is the ability to create beautiful and interesting double exposures unlike no other.
One of the first photos I saw on Lomography was one by dabai, his ‘MX of Dutch Square Clocktower and Flowerbed’ — this was one of the photos which inspired my interest in double exposing objects into flowers, bushes, trees and general foliage. After much experimenting and many failed, ‘messy’ doubles I realised the most effective doubles were the ones where the subject i was trying to exposure the flowers etc into was dark.
This then led to experimenting with silhouettes, the first exposure would be a figure either a person or building positioned in front of the sun, causing them to become a silhouette. The next exposure in theory would be exposed directly into the silhouetted figure, and if the background around the silhouette is bright, the second exposure will not show up at all and only go into the silhouette.
For example in the photo above, the first shot was on my hand blocking out the sun, making it a silhouette, then I simply double exposed it into some flowers, the results are interesting. Experimenting with this simple technique with different cameras and films can lead to beautiful and interesting results, the same technique continues to surprise me.