3. Glycerine
Glycerine is a chemical which preserves flowers and foliage by replacing the water in the plant material, making the preserved article supple and long-lasting.
This method of preserving is arguably more suitable for foliage than flowers. Certain flowers such as hydrangea, gypsophila and bells of Ireland will work well with glycerine and produce some lovely results.
To use this method, mix two parts of water to one part glycerine and place the stem of the flower into the mixture. By using warm water you will ensure better mixing and a faster rate of absorption.
Where only leaves are used, they should be submerged completely in the glycerine-water solution. The time required for completing the preservation process varies, but expect two to perhaps three weeks before the glycerine solution reaches the leaf tips.