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Raspberries

Raspberries

Recommended

Conventional cooling

Dynamic Cooling

Pre-cooling

De-greening

Ripening

General Tips for Raspberries

Storage temperatureRelative Humidity (RH)DurationPre-coolingSensitivity to ethyleneEthylene ProductionControlled Atmosphere
Storage temperature: 0° C
Relative Humidity (RH): 90%-95%
Duration: 2-5 days
Pre-cooling: Air cooling
Sensitivity to ethylene: Low
Ethylene Production: Low
Controlled Atmosphere: Not recommended

Storage Temperature: Recommended storage temperature is 0 °C.

High Humidity: Use humidifiers capable of precise control to maintain maximum desired humidity, or select an air cooler with a narrow temperature differential (ΔT).

Storage Duration: Recommended period is 2 – 5 days.

Ozone: Installation of an ozone-generation system is advised to reduce microbial load.

Controlled Atmosphere: Not recommended — uneconomical for small-scale production, with minimal storage benefits.

Dynamic Pre-Cooling: A detailed study of temperature absorption time and airspeed ensures uniform cooling to the core of the pre-cooled product.

IMPORTANT TIPS
  • Rapid pre-cooling at 2 °C and maintenance of the cold chain throughout all stages of handling and distribution.
  • Maintain uniform temperature within the cold-storage chambers.
  • Dynamic Pre-Cooling is essential to ensure even and effective temperature reduction.
  • Cooling should be achieved with low air velocity to avoid physical damage.
  • Avoid condensation or water droplet formation on the product surface.
  • Disinfect cold-storage chambers thoroughly before use.
  • Avoid external odors — raspberries easily absorb ambient smells.
  • Remove ethylene from the storage environment.
  • Maintain high CO₂ concentrations, but not above 25 %, as excessive levels may cause flavor deterioration and surface browning.