Drying temperature is a critical parameter in gummy manufacturing, but it does not scale linearly with gummy size. Instead, the optimal drying temperature must be adjusted based on the gummy's mass, surface area, and internal moisture diffusion rate.
How Drying Temperature Changes with Size
As gummy size increases from a bear (~2g) to a worm (~5g) to a giant bear (~20g), the optimal drying temperature generally decreases. Here’s why:
- Mass and surface area scaling: Larger gummies have a smaller surface-area-to-volume ratio. A bear (2g) has relatively high surface area per unit mass, allowing faster moisture evaporation. A giant bear (20g) has much lower relative surface area, meaning moisture must travel further from the core to the surface.
- Internal moisture diffusion: In larger gummies, moisture moves from the center to the outer layer more slowly. If you use the same high temperature as for a small bear, the outer surface can over-dry, harden, or “skin over” while the interior remains wet. This leads to cracking or uneven texture.
- Optimal temperature ranges: Based on standard gummy manufacturing practices:
- For a 2g bear: Drying temperatures typically range from 55°C to 65°C (131°F-149°F) for a relatively short period (e.g., 12-24 hours).
- For a 5g worm: Drop to 45°C to 55°C (113°F-131°F). The increased mass requires gentler heat to allow moisture to escape evenly without surface hardening.
- For a 20g giant bear: Reduce further to 35°C to 45°C (95°F-113°F). The much larger interior demands a lower temperature and longer drying time (often 48-72 hours) to achieve uniform texture.
Key Considerations for Manufacturers
Humidity and air flow also play major roles. Higher humidity requires even lower temperatures. Adequate air circulation helps remove surface moisture, but for giant gummies, excessive air flow at high temperature can case-harden the product. Always prioritize temperature over time: it’s safer to dry longer at a lower temperature than risk ruining a batch by rushing at high heat.
We recommend running small-scale tests when scaling gummy sizes. Measure core temperature during drying-ideal internal temperature should stay below about 40°C (104°F) for large gummies to prevent gelatin degradation or sugar crystallization. Adjust the drying curve based on product weight and desired chewiness.
Remember
At KorNutra, we focus on process optimization for each specific gummy profile. Never assume a one-size-fits-all temperature. Always match drying parameters to the physical dimensions and formulation of your product.