OREA Wave (185) vs April Flat Bottom Paper

Fits

Kalita Wave 185

Flow

Unknown · Unknown

Material

Paper · Cellulose

Reuse

Single-use

Availability

In production

How it brews

OREA's wave paper is a 185×185 mm Japanese-stock wave filter. OREA states it's "compatible with any brewer that works with the Kalita Wave 185 filters, as this shape and size is the same" — fitting the V3, V3 MK2, Glass OPEN and V4 Narrow/Wide (not the Big Boy) — so it sits in the Kalita Wave 185 seat and interchanges with those papers. OREA publishes no bleach or flow spec, so both are left blank rather than guessed. (OREA also makes a flat "Type G" paper, catalogued separately.)

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.