(1) According to the person who applies the seal, it can be divided into: factory seal (factory seal, which is added by the export factory), lock (customs seal, which is added by the customs), ship seal (shipping company seal, which is added by the shipping company), and dock temporary seal (dock temporary seal, which is added by the dock).
Note: About the temporary seal of the dock, this situation is very rare, generally only in two cases will be used: one is when unloading the ship accidentally damaged the seal on the back door of the cabinet or the higher authorities require the opening of the cabinet (such as customs or commodity inspection, etc.), the dock system will record the reason for opening the cabinet; The other is to unload the container in the dock, the consignee picked up the first batch of goods, in order to avoid disputes, it will add a temporary dock seal.
(2) According to the material and function of the seal, it can be divided into: high security seals (also known as bullet seals), steel wire seals, plastic seals, iron seals and padlock seals.