1) Quality standard
IQF frozen well, color: natural & uniform yellowish color; typical
flavor, no off odor; no foreign matters; kept, transported under minus 18
celsius degree.
Tolerance:
Linked pieces: 2% (max.); pieces with skin waste: 3% (max.); broken
pieces: 1% (max.); unrippen pieces: 3% (max.); naturally split pieces: 2%
(max.); impurity pieces: 2% (max.); repaired pieces: 3% (max.);
different color pieces: 2% (max.); heavy spots: 1%; light spots: 3%(max.).
Total tolerance rate: 10% (max.)

2) Process steps
Fresh raw chestnut-------selected & graded-----to remove shells by
hand-----blanched-----to remove the inner skins by hand------to
repaired----washed clean------water dripping----IQF-----selected &
graded------packing------storing----loading----shipping.