Infrared Transparency Makers
Infrared has been used by the military for years. They use it for target acquisition, surveillance and homing and tracking. It's also used for weather forecasting and wireless communication. But it can also be used to make transparencies.
Many transparency companies have used infrared technology to give you a clean copy on your transparency. If you like the look of transparencies made with infrared you can find a maker that uses Infrared technology. Look on EBay for an affordable infrared used transparency maker. It's easy to use and cheap.