What is Freeze Drying?

Botanique Preservation Equipment, Inc. is the recognized leader in the design and manufacturing of Freeze Drying Equipment for Freeze Dried Floral Preservation. Freeze Drying (Lyophilization) is accomplished by sublimation of ice in a vacuum. Sublimation refers to a solid (ice) changing directly to the vapor state (water vapor). The basic elements of this process have been known for nearly 100 years. However it was not until World War II that much emphasis was placed on the refinement of the process. During this time a lot of attention was given to the development of equipment and techniques for the purpose of supplying large quantities of dried blood plasma and penicillin to the armed forces. By the end of the war, freeze drying by a Lyophilizer had become known as a near perfect method of preservation. Today, freeze drying (Lyophilization) is used in many industries, such as, pharmaceutical manufacturers, camping/hiking food processors, museums, taxidermy, and the floral industry as well as within laboratories as a Laboratory Lyophilizer.

The Process

What is Floral Freeze Drying (Lyophilization)? The basic principle of floral freeze drying (Lyophilization) is the removal of water from frozen botanicals as water vapor, and collection of this water vapor as ice in a condenser. With the botanicals solidly frozen during the process, and under a deep vacuum, shrinkage is eliminated or minimized, and near perfect preservation will result. The process requires the flowers to be frozen and then gradually the temperature is raised to stimulate sublimation (ice crystals changing directly to water vapor). Over a period of days all the water from the botanicals will sublimate and go into a condensation chamber. The water vapor turns back into ice in this very cold (-40° F or lower) condensation chamber. Defrosting the condensation chamber removes moisture from the freeze drying (Lyophilization) system. When ice quits forming in the condenser the load is dry. Often the only requirements for long term storage of freeze dried materials is the prevention of moisture re-entering the product.

Why Choose Botanique?
  • We are the recognized leader in technology in the Floral Freeze Drying Industry.
  • We have a polymer research chemist in our organization, with a full range of NON-hazardous pre-treatments for Floral Freeze Drying.
  • Our comprehensive Freeze Dry Training Program has over 1750 graduates from around the Globe.
  • And we have the Best Warranty in the Freeze Dry Business.