Professional florists use special, and expensive, products such as clear resin and craft water to give the appearance of water in vases of artificial flowers. If you like to design your own silk flower arrangements, why not make your own liquid vase filler as well. In addition to creating the look of water in your vase, the filler will serve as a gel-consistency glue to add stability to your flower design.
Pour the water into your sauce pot. The pot should be large enough to allow you to add ingredients to the water and to stir without spilling. Heat the water to boiling on the stove.
Remove the pot from the heat. Add the gelatin and stir slowly until it's completely dissolved.
Stir in the vinegar and glycerine.
Add food colouring if desired. Stir in 2 to 4 drops of food colouring to tint the glue. Food colouring can be powerful, so start with 2 drops and add more as necessary. Blue will simulate water in the finished vase filler, but other colours may match your flowers better.
Allow the mixture to cool for about 15 minutes before pouring it into your vase. Hot water can damage the plastic coating on artificial flower stems. Once the flowers are arranged, the glue should dry completely in 24 hours.
Pour any remaining mixture into a glass jar. Close the lid tightly, and store the jar in a cool location. Reheat the liquid for future use by warming the jar in a pot of hot water to soften the gel.
Vase filler you make at home is often cloudy rather than completely clear. If you don't want to use food colouring to tint the filler, consider using a coloured vase to mask the cloudiness.