B3 Flat filters are packaged in a flat stack with pre-folded creases for users to fold.
FILTER PREPARATION
Fold the 4 edges of the filter following the indentation marks on the paper. It is not necessary to keep the flat bottom shape of the filter; you just need to go over the folds.
Place the filter on top of the dripper and press the central part of the paper downwards.
Rinse the filter, starting from the centre and moving towards the outer edge by pouring hot water in a circular motion. Make sure that the entire surface of the filter is stuck to the walls of the dripper, without leaving any air channels between the filter and the filter holder.
The image shows how the filter should look before starting the infusion.









Martin (verified owner) –
The Sibarist B3 filter is amazin, very predictable medium flow rate which stays predictable over quite a wide grind range. Can be used multiple times after rinsing (very strong)