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Field guide8 Curing Problems: How to Diagnose, Fix, and Prevent Them
Concept

Product Geometry and Drying Rate

The influence of diameter, thickness, length, shape, surface-area-to-volume ratio and internal structure on moisture movement and drying time.

Thin or small products expose more surface relative to their mass and usually dry faster. Larger diameter increases the distance moisture must travel from the centre.

Flat, rolled, folded and irregular products create different path lengths and sheltered regions. Contact points and ties can also change local evaporation.

Particle size, fat distribution, connective tissue, voids and casing affect diffusion and shrinkage. Equal outer dimensions do not guarantee equal internal transfer.

Airflow and humidity act at the surface, while internal migration supplies moisture. Excessive surface transfer can create case hardening instead of safely accelerating the centre.

Group products by geometry and follow representative weight, dimensions, aw and cross-sections. Average batch loss can conceal the slowest unit.

Validate schedules for the actual product family and loading. Use conservative representative positions and do not declare completion from elapsed time or surface feel alone.

Related in the Codex

References

  • https://www.fsis.usda.gov/guidelines/2023-0002
  • https://www.fao.org/fao-who-codexalimentarius/sh-proxy/tr/?lnk=1&url=https%253A%252F%252Fworkspace.fao.org%252Fsites%252Fcodex%252FStandards%252FCXC%2B58-2005%252FCXC_058e.pdf
  • https://www.fda.gov/inspections-compliance-enforcement-and-criminal-investigations/inspection-technical-guides/water-activity-aw-foods