What issues should be paid attention to when selecting a sterilizer?

### Key Considerations for Selecting a Retort

Retorts are essential for sterilizing various packaged foods, including those in glass bottles, plastic bottles, plastic bags, retort pouches, and cans. Selecting the right retort depends on several factors:

1. **Temperature and Heat Distribution**:

- Fully automatic retorts provide uniform heat distribution and are ideal for strict requirements.

- Semi-automatic retorts are a cost-effective alternative with similar controls but require a larger budget.

- Manual retorts are less effective for precise sterilization due to manual temperature and pressure control.

2. **Packaging Material Considerations**:

- **Aerated or delicate packaging**: Use water bath or spray retorts.

- **Retort pouches, glass bottles, or cans**: Require pressurized sterilization to prevent breakage or lid popping.

- **Large or dense flexible packaging**: Fully water-based (water bath) retorts are suitable for products like large meat pieces.

- **High-viscosity or heat-sensitive products**: Rotary retorts are ideal for products like eight-treasure porridge in cans.

- **Tin cans**: Steam or spray sterilization is suitable, but water bath retorts are not recommended.

- **Glass bottles**: Use spray retorts to avoid lid popping and rapid cooling cracks.

- **Vacuum flexible packaging**: Avoid steam retorts to prevent bulging; use spray or water bath retorts instead.

- **Sausage-like foods**: Immersion retorts ensure even heating and uniform shrinkage.

- **Boxed products**: Spray retorts work well unless packaging is excessively large or heavy.

By matching the retort type to the packaging material and product characteristics, optimal sterilization and product quality can be achieved.