Sibarist ETKIN (FAST) vs Sibarist B3 FLAT

Fits

Flat basket

Flow

Fast · Manufacturer-stated

Material

Paper · Abaca

Reuse

Single-use

Availability

Specialty only

How it brews

Sibarist's fast abaca flat-bottom paper cut for the Etkin's 8-cup batch bed. It sits in the flat-basket family and interchanges with flat papers of the matching fit. It's the same high-permeability, low-clog abaca sheet as the rest of the FAST line, shaped for a larger batch bed, which Sibarist frames as fast-draining so the grind and pour set the pace rather than the paper (its own claim, not measured here). Specialty, single-use, with the usual pre-brew rinse.

Fits

Flat basket

Flow

Medium · Manufacturer-stated

Material

Paper

Reuse

Single-use

Availability

Specialty only

How it brews

The B3 grade of Sibarist's abaca flat-bottom paper (associated with Matt Winton's flat-bed method), in S and M. Unlike the FAST papers, B3 is a lower-porosity sheet Sibarist rates as medium flow, trading some drainage speed for more body and retention across the flat bed. That medium class is the maker's own framing, not independently measured. It fits the flat-basket seat and interchanges with other flat papers of that fit; a pre-brew rinse is common.