I am used to a certain amount of science to photography. The angle of incidence is equal to the angle of reflection, 128 oz makes 1 gallon, etc. In photography, film or a sensor usually has a certain amount of exposure required to make the proper photo and sometimes you need be you bracket and shoot some exposures over and under the recommended one. If you bracket your exposures, one of them will be correct and you will have a perfectly exposed image.
This is apparently not the case with infrared film. I am discovering that the trick to infrared seems to be that you just keep bracketing and see what comes out and that will be the proper exposure… not what I am used to. That being said I have not perfected the art and science of infrared film, but I am getting closer. Infrared film requires a filter that holds back the visible light spectrum and only allows in the infrared light. I have experimented with 2 different filters but I have not mastered the technique yet. The first filter held back only some of the visible light and the second one seems to have held back all the light. Below is a sample of one of my infrared test images. It is not perfect yet, but I am getting there. August is an extremely busy month for us so it will be a while before I can do more tests, but I will keep you informed.