Cryogenic roses can resist unchanged for even 25 years, so they are also called preserved roses.
The technology behind these roses is called lyophilization and consists of dehydration by cryogenisation followed by a decrease in the environmental pressure in which they are placed to allow water in the petals and stem to sublimate from the solid phase (ice) to the vapor phase. This procedure is relatively complicated and expensive and can last for a week.
The technology behind these roses is called lyophilization and consists of dehydration by cryogenisation followed by a decrease in the environmental pressure in which they are placed to allow water in the petals and stem to sublimate from the solid phase (ice) to the vapor phase. This procedure is relatively complicated and expensive and can last for a week.
