Environmental Considerations453Environmental ConsiderationsBefore they are used, forms should be stored for at least 24 hours —preferably 48 hours — in the environment in which they will be used. Thisstabilizes the moisture content of the paper, resulting in better feeding andstacking. But forms should never be stored in environments that result indamage such as delamination of glues, creasing, folding, etc.Form TypesThree kinds of continuous form paper are specified for use with the printer:• Edge-perforated, fanfolded, single-part forms• 2- to 6-part multipart carbon forms• 2- to 4-part multipart carbonless formsFor all forms, the width range is 3 to 17 inches, the length range is 2 to 12inches.Form WeightUse 15 to 100 pound (6.80 to 45.36 kg) stock. Light weight and recycledforms must be strong enough to assure that tractor holes and perforations donot tear or detach during form feed, skipping, and ejecting operations.Form ThicknessForms must be no thicker than 0.025 inches (0.0635 cm) at the thickest partof the form — including glue lines, staples, perforations, etc. — and is notrestricted to just the print area.Form EvennessThe evenness of forms must not exceed 0.003 inches (0.00762 cm) acrossthe print area (between the side perforations).Tenting caused by buildup of perforation thickness must be minimized. Aperforation thickness measured at the major perforation that exceeds 1.25times the forms thickness measured in the print area will result in anunpredictable and unreliable form. The perforation thickness must neverexceed the maximum forms thickness of 0.025 inches (0.0635 cm).Tractor Pin EngagementThe printer uses tractors with 6-pin engagement. Detailed engagementspecifications are given in ISO-2784, but are summarized in the table below.
