Medium-grain milled rice is susceptible to fissuring caused by
rapid moisture transfer. The range of exposure RH at which minimal
breakage occurred was narrower for the two tested varieties
than that reported in similar experiments with long-grain varieties.
The least amount of breakage occurred in the RH range of 50–70%
RH at air temperature of 30°C for rice at 12.5% MC. Varietal
effects did not cause any significant differences in breakage. Also,
the MC of the milled rice was a critical parameter in determining
the extent of damage at a given environmental condition. High
MC rice was more susceptible to damage at low exposure RH,
and low MC rice was more susceptible at high RH