The surface smoothness for general-purpose gift boxes must be kept within +/- 1mm. This is the minimum requirements to make sure they look good. And this also, to some degree, represents a gift boxes factory’s level of workmanship and quality control.
Color can make or break the custom printed gift packaging. If you see gift boxes with distinct color discrepancy, and you can just cross the maker off your vendor list. A purpose of gift boxes packaging is to add a touch of aesthetic and luxury. If a factory fail to realize the desired color effect, chances are it’s a poorly organized company!
3. Brightness and viewing angle.
The brightness and viewing angle of the appearance of the paper can also be checked. From every direction, the cardboard gift boxes should be bright and gives a high-end look.
Safety is also critical for cardboard gift boxes, especially when it comes to the packaging of food and tea boxes etc.
For all the emphasis on quality, there are many other factors that can be taken into account, such as pre-sales & after sales support, designs,response time and supply ability, etc.