Knowledge Base › Troubleshooting Atlas › Frozen section
Condensation / frost on frozen sections
Also known as: frosting, ice crystals
What it looks like
Frost appears as white or cloudy areas on the tissue sections, obscuring cellular details.
Where it usually appears: Usually observed during the sectioning of frozen tissue blocks, particularly in low humidity environments.
Likely causes
- High humidity in the freezing chamber
- Inadequate cooling of the cryostat
- Rapid temperature fluctuations
- Improper handling of the frozen blocks
Immediate checks
- Check the temperature settings of the cryostat
- Inspect the humidity levels in the laboratory
Corrective action
- Allow the cryostat to stabilize at the correct temperature
- Ensure proper freezing of the tissue before sectioning
Preventive action
- Maintain consistent cryostat temperature
- Control humidity in the laboratory environment
- Use anti-fogging agents if necessary
This atlas is for educational purposes for laboratory professionals. It does not replace your institutional SOPs, manufacturer instructions, validated protocols or pathologist judgment. Adapt any action to your laboratory and equipment.
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