UPRINTJET Handheld inkjet printer cartridges are available for Handheld Inkjet printer model: BT-HH6105B2 handheld printer or other 0.5 inch handheld inkjet printer without encryption.Specifications: Types: Solvent Quick-Drying Cartridge Capacity: 42ml Colour: BT-2585P White ink cartridge Widely Application: Widely used in most surfaces and materials, such as wood, leather, cloth, bamboo, wood, paper, glass, ceramics, plastic, cartons, boards, PVC pipes, aluminum foil etc. Package: 1PCS White Ink cartridge replacement Precautions and Maintenance: Every time you use a white ink cartridge, you need to shake the ink cartridge 1. If it’s not operating for more than 10 minutes, please cover the head cover in time to prevent the head of the ink cartridge from being blocked. 2.If there are printing white lines or incomplete printing, this is normal phenomenon, because this is fast drying ink cartridge. Solution: (1) Please use a tissue to cover the ink cartridge nozzle and shake the ink cartridge up and down vigorously. (2) Use tissue or soft wet cloth to wipe the ink cartridge nozzle gently.br> (3)Adjust the handheld inkjet printer print gray level value to more larger, try to print several times until it print clear.