Inspissation
Inspissation is the process of thickening by dehydration.
Intentional use
Inspissation is the process used when heating high-protein containing media; for example to enable recovery of bacteria for testing. Once inspissation has occurred, any stained bacteria, such as Mycobacteria, can then be isolated.A Serum inspissation or Fractional sterilization is a process of heating an article on 3 successive days as follows:
| Day | Temperature | Time | Purpose |
| 1 | 85 °C | 60 minutes | Drying of the medium and killing the organisms in their vegetative form |
| Time in between | overnight incubation | Growth of vegetative forms from spores | |
| 2 | 75 to 80 °C | 20 minutes | killing the organisms in their vegetative form |
| Time in between | overnight incubation | Growth of vegetative forms from any spores remaining | |
| 3 | 75 to 85 °C | 20 minutes | killing the organisms in their vegetative form as well as the leftover spores |