Thickness is another consideration. Some transparency on the market is thin, and will warp if you select a dark image quality. Thinner material will work on an overhead transparency, but for modeling thicker material is better. The thicker material is easier to print on, and glue into your building. Laser Printers - Use transparencies designed for laser printers.
Laser printers use heat to fuse the ink to the printing medium.
DO NOT use inkjet transparency material in a laser printer. We have found that Aukwright Brand PPC film works well. If you are using the transparency as a window in a building or train, you will want to select a dark image intensity, preferably the darkest setting. The color inks associated with most printers are transparent to allow for color mixing, and by selecting a dark image intensity you will reduce the transparent affect. We use Krylon 1305 UV-Resistant Clear.