HP d640 HP D640 High-Volume Printer - User Manual (Printer and Accessories), C - Page 249

General Guidelines Using Paper Note It is possible that labels could meet all of the general specifications listed in "Adhesive Label arrangements" and still not print satisfactorily because of the printing environment or other variables over which Hewlett-Packard has no control. Table D-5 Label specifications Adhesive Basis Weight Must not be on any external surfaces of the label before, during or after printing. Label construction and die-cutting must not allow labels to peel off during transport, printing, or fusing. 32 to 34 pounds (120 to 128 g/m2). Curl In-ream: flat within 0.2 in. (5 mm). Finishing Fusing Compatibility Packaging Cut sheet within 0.031 in. (0.79 mm) of nominal and within 0.2° of square. All adhesives, carrier sheets, top sheets, and other materials used in label construction must be compatible with the heat and pressure of the fusing process. Materials must not discolor, melt, offset, or release hazardous emissions when heated to 392°F (200°C). Moisture proof wrap to preserve properties. Shelf Life One year, minimum, stored at 72°F (22°C) and 50% R.H. Refer to Purchasing in the next section for ordering HP labels. Note The following actions can cause labels to peel off, possibly damaging the inside of your printer: printing on labels while the printer is in duplex mode or removing individual labels from the carrier sheet, then printing on the remaining labels. Note Hewlett-Packard does not recommend removing any labels from the carrier sheet and then printing on the remaining labels. If labels must be removed, remove them from the bottom of the carrier sheet, continuing toward the top. Note Overhead transparencies used in D640 printers must be able to withstand the 392°F (200°C) temperature encountered in the printer's fusing process. Specifications for overhead transparencies are summarized in Table D-6, "Overhead transparency specifications summary". Using Paper D-13