Be applicable to the secret envelope and compensation bill of enterprise's employee, pay bill, secret salary bill. Pass the computer paper's gelatinization and related part or reduce feeling Mo to print. to carry out password envelope, secret envelope, pay bill, secret salary bill. compensation bill secret compensation bill's protecting. There are various shadings to choose in order to ensure the printed contents' safety，Printing location indirect election and not the indirect election can select freely，and more raised the password envelope, secret envelope and compensation bill's security. the password envelope, secret envelope and compensation bill glued together, easy to check. tight glued. and if opened, It is unable to recover. indeed safe and security. the password envelope, secret envelope and compensation bill, all have various usages for consumer; The bookbinding of unipole/double work potential can choose, to assure the process of printing is fluent.