As I´ve learned C-Vitamin is the same as Acidum Ascorbicum. This was bought in the local pharmacy and dissolved in the ratio 1:50 with water. I put one drop on the microscope slide and waited for about one day for the crystals to form. Water evaporates and the crystals remain on the slide. The most exciting thing is that you never know what you get. You can get 100´s of images on just one slide. Try different magnifications.
I hope this helps and feel free to experiment
