drip brew - Why do we need to fold the border of filters? - Coffee Stack Exchange
How To Fold Filter Paper | Fluted Filter
TIL: when you use cone-shaped coffee filters, there is a preferred way to fold them to ensure proper fit. : r/lifehacks
How To Pleat Fluted Filter Paper | Fluted Filter
File:Paper filter folding and filtration.JPG - Wikipedia
How to fold your Chemex filter to make coffee like a barista
Chemex Filter Fold | Coffee Kevin shows a simple but important (to him anyway) step and that is how to fold your paper filter in order to ensure a smooth, clear Chemex
FAQ: Ceramic Coffee Dripper – Kuissential
Cone Coffee Filter Instructions - How to Use a Cone Coffee Filter