( Update: 06/02/2015 )
Preserved duck egg
They're actually preserved with a mixture of clay, ash, salt, and lime. Modern methods don't require them to be coated in mud and buried in jars anymore.
Other name: century egg, hundred-year egg, thousand-year egg, thousand-year duck egg, and millennium egg
Types: eggs with mud wrapped or without mud wrapped, or packed with vacuum bags
Specification
Length : 5 cm
Shelf life: 6 months
Packing: 20PCS× 10boxes=180PCS/CTN
or as per request from buyers
Salted duck egg
Vietnamese ducks are naturally bred in fields, so quality of yolks get soft, delicious and have natural color.
Having better salted eggs also thanks to freshness, quality of salted eggs made from ducks bred industrially in other countries can't be as good as those because of loose yolks, due to influences from industry food.
Moreover, maintaining product quality, frequent quarantines are carried on to ensure that eggs don't get sudan infection, melamine ...
Specification
Grade 1 : 70grs min/pc
Grade 2 : 65 - 69grs /pc
Grade 3 : 60 - 64grs /pc
Grade 4 : 55 - 59 grs /pc
Shelf life : 1 - 2 years
Packing : 160pcs/ctn ; 580ctns/cont 20'
in 1 cont 20' : Grade I (30%) + Grade II (40%) + Grade III (30%)
Type: yolk of salted duck egg
Specification
Grade 1 : 12 grs /pc
Grade 2 : 8 - 12 grs / pc
Grade 3 : < 8 grs / pc
Packing : in vacuum bag, in carton
or as buyer's request