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. Print 2 copies of the same image, align and mount them both on the inside of your building. Light will be reflected back out of your building, emphasizing the windows designs.
Transparencies like to be treated well.
Try to avoid printing on your transparency when there is high humidity. Ink does not bond as well when either the printer or the transparency is cold. This article was printed in the June 1999 issue of the NMRA Bulletin. In recent years color printers have become a standard component in home Personal Computer setups. This is an advantage for modelers, since color printers can be used for adding detail to layouts.