Before drying chili peppers, there are several preparatory steps that are essential to ensure the quality of the dried product and reduce the risk of contamination and spoilage. Here are some common preparations before drying chili peppers:

1. **Selection and Cleaning**:

   - Select chilies that are at a consistent stage of ripeness to ensure uniform drying.

   - Clean the chilies to remove dirt and impurities from their surfaces.

2. **Stem Removal and Slicing (if necessary)**:

   - Remove the stems from the chilies if needed.

   - For faster drying, slice the chilies or cut them lengthwise to facilitate quicker evaporation of moisture.

3. **Pre-treatment**:

   - Pre-heating treatment: In some cases, soaking in hot water or steaming can soften the chili tissue and speed up the drying process.

   - Blanching: This helps kill some bacteria and reduces enzyme activity, preventing color changes.

4. **Arrangement**:

   - Lay out the chilies evenly on drying racks to avoid overlapping, which ensures good air circulation and improves drying efficiency.

5. **Environmental Preparation**:

   - If air-drying naturally, choose a place with good ventilation and plenty of sunlight.

   - If using a dehydrator, set appropriate temperature and humidity conditions.

6. **Sanitation**:

   - Ensure that tools and containers used during the process are clean.

   - Personnel should maintain personal hygiene and wear appropriate protective gear.

7. **Pest Control Measures**:

   - During natural air-drying, take measures to prevent infestation by insects, birds, and rodents.