Plastic seals and tags, also known as electric meter seals, power seals, and oil seals, are widely used in various industries for one-time prevention of theft and leakage. These seals are generally printed with the customer name, logo, and unique serial number or code using laser printing or hot soup technology. However, the logo pattern of most plastic laser markings appears dim due to the inability of plastic to absorb laser energy. This issue can be resolved by adding Laser Marking Additives and controlling the molding pressure and temperature.