Why is there a box in the phone case?

The pattern inside the mobile phone case is good-looking by the manufacturer. Looking for patterns on the mobile phone case, manufacturers use silk screen printing or chemical etching to carve. In order to ensure the durability of patterns, they are either deeply attached to the watch case or integrated with the watch case, which is generally difficult to remove. If it is removed by physical scraping or chemical lotion, it will have an impact on the body of the mobile phone case. Later, some people, especially beautiful women, liked some patterns and put some on themselves. After a while, they want to change their patterns, so they can use soapy water and 84 disinfectant to clean them. Therefore, the pattern inside the mobile phone case is determined by the manufacturer.