This application is under development, additions are planned as an explanation of the 4:6 method I am interested in your comments or ideas to continue to improve this application. Prepare a speciality good coffee following the 4:6 method of Tetsu Kasuya, using a Hario V60 dripper, Chemex, Blue Bottle, Origami or any other filter dripper. The 4:6 method is a recipe of Tetsu Kasuya who won the 2016 World Brewer's Cup in Dublin, Ireland. The method consists of dividing the volume of water into t