FadedFrontiers they add resistance and aid even flow, allowing you to grind Finer.
Thanks for the link, which I will carefully read.
I am confused by the statement that it increases resistance, which allows you to grind finer. If the paper increases resistance, then it slows the flow. If you wish to maintain the same shot time, you must grind coarser, right? Am I missing something here?
Instead, I suppose that (theoretically) the increased resistance is slowing the flow and thereby increasing the contact time with the grinds, leading to greater extraction. Except that I am experiencing faster flows and significant declines in taste.