That photo Tech article is the same source to cover it in detail that I read. I have been wasting film and paper for over 40 years and had heard of it before. Just took me a long time to try it.
I doubt that changes in color temp would be of much influence. One you have worked out the time and placement it should always work. Although I have not tried it I believe that with pan film it would work with any or no filter if the light's brightness was properly set.