If you are using a regular film camera, look at IR film from Kodak. I believe it is called Kodak EIR Ektachrome. If you are using a digital camera, you need to modify it by removing the IR blocker on the camera's CCD. Which may mean voiding any warranty on the camera. You can also use an IR filter, but it would take a really long exposure to record the image. Try using an opaque 87 and 87c filter.