Problems needing attention in screen drying         In the packaging and printing industry, screen printing operators know that a clean and tidy environment is very important for plate making. A clean and tidy environment can prevent many quality problems. Problems needing attention in screen drying.      Because the dust and oil stains in the environment adhere to the surface of the photosensitive adhesive layer, they will form pinholes on the screen, affect the printing quality, and then lead to the decline of production and quality.Problems needing attention in screen drying.       Relatively speaking, the cleanliness of the oven is also very important, but this is often ignored. While expanding the scope of consumption, some small and medium-sized enterprises also change the drying equipment from hair dryer to oven.Problems needing attention in screen drying.       However, due to the lack of effective management, they will put warm cloth and some sund […]

Common packaging methods of tea      In daily life, ordinary metal can packaging metal can is made of thin paper. The can shape is square and cylindrical, and its cover is divided into single-layer cover and double-layer cover. Common packaging methods of tea.     Its disadvantage is poor sealing, and tea leaves will absorb enough water, soften and deteriorate after being exposed to humid air for one hour. Iron has metal odor. At the same time, it is easy to be oxidized over a long time, so it can not preserve tea for a long time.Common packaging methods of tea.     Composite film bag packaging at present, more and more commercial tea packaging adopts composite film bag packaging. Its disadvantage is that it is not dark and airtight. Over time, it will make tea moldy and have peculiar smell. Chlorophyll and other components undergo photocatalytic reactions.Common packaging methods of tea.     Plastic molded containers are packed by polyethylene, polypropylene, polyvinyl chloride and ot […]