Studies
Clear, green and brown glass are permeable in the visible light spectrum and don't offer enough protection against decomposition caused by light. As an experiment, several herbs and spices were stored for 3 months in several types of glass (violet, brown, clear), and were exposed to the sun for several hours.
After 2 months, the visible quality change was recorded with photographs, and the difference in smell determined in a blind test with volunteers. The illustration shows clearly that the chive samples that were exposed to the sun have bleached in brown and clear glass. The photograph clearly shows that the sample stored in MIRON violet glass has no color change. The smell of the chives stored in MIRON violet glass was also clearly stronger and fresher.
A cherry tomato was stored for 7 months in a clear glass and in a MIRON violet glass bottle and kept at room temperature where sunlight could reach it. The result was photographed after 7 months. The microbiological changes of the tomato stored in clear glass can be clearly seen. The tomato stored in MIRON violet glass however shows no loss of color and no signs of drying out.