Overhead transparencies When printing transparencies, use of tray 1 is recommended. Overhead transparency film must be designed specifically for use with laser printers. Photocopy transparency film might not be compatible with laser printers because of higher temperature and stiffness requirements. Overhead transparency film is very smooth and must have a topcoat to provide the proper electrical and toner adhesion properties. A transparency that is made of poor materials or that is too thin can easily melt in the fuser and damage the printer. Overhead transparency materials must be compatible with the heat and pressure of the fusing process.
The table below summarizes the overhead transparency specifications that provide the best performance. Table 12. Overhead transparencies specifications 32 Printer description EN Property Specifications Caliper (thickness) 0.10 mm to 0.11 mm (4.0 mils to 4.4 mils). Electrical surface resistivity 2.0 to 15 by 1010 ohms/square. Fusing compatibility Overhead transparency materials must be compatible with the heat and pressure of the fusing process. Materials must not discolor, melt, offset materials, or release undesirable emissions when heated to a temperature between 175° to 230° C (347° to 446° F) for 0.1 second.