April Flat Bottom Paper vs Timemore Crystal Eye B75 (155)

Fits

Flat basket, Kalita Wave 155, Kalita Wave 185

Flow

Fast · Manufacturer-stated

Material

Paper · Cellulose

Reuse

Single-use

Availability

Specialty only

How it brews

The Copenhagen roastery's own flat-bottom paper, sold Small (≈Kalita 155 / Origami S) and Large (size 175, for the April plastic brewer). It's cut to sit deep with a wide base and is marketed as flowing faster than conventional flat papers — that speed claim is April's, kept as a class rather than a number here. One honest ambiguity: older retailer copy described April filters as using Sibarist's abaca FAST technology, while the current listing says virgin wood pulp (cellulose); we record cellulose per the direct listing but don't treat abaca as confirmed. It drops into a Kalita Wave 155/185 seat, so it interchanges with those papers.

Fits

Kalita Wave 155

Flow

Unknown · Unknown

Material

Paper · Cellulose

Reuse

Single-use

Availability

In production

How it brews

Timemore's own paper for the Crystal Eye B75, a 155-size flat-bottom filter made from Japanese virgin pulp. The B75 is a flat-bottom (75° wall) brewer, and its paper is explicitly cross-compatible with the Kalita Wave 155 seat (and April Small), so it interchanges with those flat papers. Timemore states no flow class and there's no reliable within-seat ranking, so flow is left unrated.