Nel is Japanese shorthand for flannel. A nel drip is a cloth-filtered pour-over, brewed slowly, and it produces the heaviest-bodied filter coffee there is.
What the cloth does
Paper traps oils and fine particles. Cloth traps the fines but lets the oils through. The result has a thick, almost syrupy body with the clarity of a filtered coffee — a combination nothing else quite achieves.
Metal filters also pass oils, but they pass fines too, and the cup is muddier.
The method
Kissaten style is slow and deliberate:
- 30 g of coarse grounds — coarser than for a V60 — in a wet, wrung-out cloth.
- Bloom with just enough water to wet the bed. Wait until it stops swelling, up to a minute.
- Pour in a thin, continuous, very slow stream, keeping the bed submerged shallowly.
- Total time three to four minutes for 300 ml.
Many kissaten brew far stronger and darker than this, closer to a concentrate.
The cloth is the commitment
A nel filter must be rinsed thoroughly after every use, boiled periodically, and stored submerged in water in the fridge. A dried cloth goes rancid, and the rancidity is unmistakable in the cup.
Replace it every few months.
Is it worth it
For anyone who likes body, yes. It is the most demanding filter method on maintenance and the most distinctive in the cup.