1. Layered Packaging Structure
From outer to inner:

• Outer layer: Rigid corrugated carton (compression strength ≥200lb/in²)
• Middle layer: EVA foam dividers (thickness ≥1cm)
• Inner layer:
  ▢ Hard-shell case (with hinge-locking grooves)
  ▢ Microfiber cloth-wrapped frame
  ▢ Silica gel desiccant (1 pack per case)

2. Frame Orientation Guidelines
Correct methods:
✅ Frames stored flat (lenses horizontal, nose pads up)
✅ Temples fully extended, avoid folding
Incorrect methods:
❌ Hanging by temples ❌ Vertical stacking

3. Transportation Environmental Controls
Key parameters:

• Temperature: ≤40°C (thermometer icon →)
• Humidity: 40–60% RH (hygrometer icon)
  Warnings:
  ⚠️ Keep away from heat ❗ No direct sunlight

4. Stacking & Dividing Standards
Tray design:

• Individual slots per frame (spacing ≥2cm)
• Corrugated cardboard separators between layers
  Stacking limit: ≤3 layers (stacked tray illustration)

5. Labels & Warning Signs
Mandatory labels:
▢ Fragile
▢ This Way Up arrow
▢ Keep Below 40°C temperature warning

Key Steps Summary

1. Individual packaging: Case + buffer cloth + desiccant → 2. Slotting into trays: Divided slots fixation → 3. Box sealing: Foam filling + temperature label → 4. Transport monitoring: Temperature-controlled vehicle/container
   
2. Notes for diagram creation:
   

• Use icons like 📦 (package), 🌡️ (thermometer), 💨 (air pillow) instead of placeholder text
• Add UN 3373 label for air transport if required
• Include a QR code linking to the digital Acetate Frame Transportation Manual
  
• Translation principles:
  

1. Maintained technical accuracy (e.g., "EVA 泡沫" → "EVA foam")
2. Used international logistics terminology (e.g., "易碎品" → "Fragile")
3. Kept format consistent with the Chinese version for easy cross-referencing