White surface greyboard envelope is a custom envelope produced for our customer-the Nulab Group. It's mainly used to pack the files or posting the samples.

The content written on the envelope is focused on the security and clearing procedures, and declares that it does not contain any dangerous or prohibited goods, explosive or incendiary devices. A false declaration is a criminal offence.

The features of greyboard envelope include white smooth surface and die cutting of thick envelope paper.

Shape design:

Die cutting of envelope:

Double sided adhesive strap:

Quality management procedures:

We have implemented strict 6S manufacturing system and ISO9001 quality management system. There are twelve QC inspectors and engineers, and all the products have to be inspected before the shipment (100% inspected).

Our strict quality control procedures can ensure the quality of our book printing and binding services. If you select our company, you will be happy to cooperate with us.

Color management procedures:

Color is the core for printing quality control, which is essential for the whole production management of any printing enterprise.

Our company has realized an effective automatic color control system, i.e. advanced Koda CTP system, which can transmit the files to printing machines directly. The traditional low-efficiency color control methods can't adapt to the drastic competition environment faced by modern printing enterprises. Our company has spent several million Yuan and a lot of effort to realizing the color reproduction according to the characteristics and performance of printing machines, so as to keep the color consistency of pre-printing processing, plate-making, sampling and printing.

Printing color management is an automatic pre-press control of color. Any printing enterprise can reduce the consumption, increase the efficiency, and heighten its core competitive force through the color management.