English
A one-piece (OPF) folder is a single layer of corrugated, which is folded into a rectangular shape. It is commonly used to package flat and thin items such as pictures, books, documents, mailing or storing documents, as it can be easily sealed and provides adequate protection.
A one-piece (OPF) folder is a single layer of corrugated, which is folded into a rectangular shape. It is commonly used to package flat and thin items such as pictures, books, documents, mailing or storing documents, as it can be easily sealed and provides adequate protection.
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