With the continuous improvement of environmental awareness, the greeting card and envelope industry has been actively exploring the application of environmentally friendly materials. Many manufacturers have started to use papers made from renewable resources such as bamboo fiber and straw fiber to make greeting cards and envelopes. These materials not only have good toughness and texture but also can significantly reduce the consumption of forest resources. Meanwhile, edible and degradable environmentally friendly inks are also gradually being more widely used, reducing the environmental pollution during the production process.......