These labels are designed to be printed on by most common laser printers, and can not be used with inkjet or bubblejet printers. For best results a laser printer which has adjustable contrast or print strength is recommended. Silver Heavy Duty Address Labels. Durable silver polyester labels Ideal for display of permanent information Suitable for outdoors and industrial use Waterproof, weatherproof and resistant to oil, detergent and grease Mark-proof and UV light-fast Can be used in freezers (-40 to +80°C)