The structure of the heaven and earth cover
The heaven and earth cover box is divided into an upper cover and a lower cover. The upper cover is the earth and the earth is commonly known as the earth and earth cover. There are two kinds of...
What is four-color printing
What is the order of the four-color printing color sequence? The four-color printing process is based on the subtractive color mixing law, using the three primary colors of yellow, magenta, and cyan...
Development and application of packing box
With the rapid development of modern industry and the continuous improvement of people's living standards, people's demand for packaging boxes will continue to increase, and higher requirements for...