These tamper-proof security envelopes can leave clear and indelible mark for any attempt of unauthorized opening.

Description and application: 

These tamper-proof security envelopes can leave clear and indelible mark for any attempt of unauthorized opening.Thus,it can  provide perfect optical opaqueness and ensure maximum confidentiality.

Features:

1.Impact and tear resistant

2.Heating and freezing resistant

3.Waterproof

4.Safe delivery

5.Deter unauthorized read or theft

Application:

1.High security cash transit companies

2.Police and judicial criminal divisions amassing trial evidence

3.Security services transporting top-secret documents

4.Credit card and other finance corporation