Pour-Over Filters Customized for Roast Type, by Japanese Coffee Accessory Co., Cafec

Japanese coffee equipment company Cafec has added a new layer of subtlety to home brewing coffee with a line of paper, cone-shaped coffee filters designed to take advantage of particular roasts. The line of filters allows the serious coffee drinker to perfect their home brew further.
Called Cafec Osmotic Flow, the filters come in three types. One each for light, medium-dark and dark roast coffees.
The magic comes from Cafec’s proprietary drying process that uses hot air and results in what Cafec calls “creping.” This is a crepe paper like texturing on their paper filters, each side of the cone, instead of just on one side. Each filter in the line takes a different approach to the dual sided texturing that allows different mesh densities and thicknesses which changes the water flow and extraction from the ground coffee.

The light roast paper filters is the thinnest but the most dense at 0.15mm. This allows the fines to gather evenly along the walls. This slows down the flow and encourages aroma while brewing. The density retains fines for better cup clarity.
The thickest paper is for medium-dark filters that are creped on each side. The paper is 0.28 mm thick but lower density. This gives the paper a faster flow that is supposed to promote balance.

The darkest roast paper filters come in at 0.22 mm thickness and are creped on each side. The interior crepe allows for faster liquid flow in the beginning and then accumulates fines towards the end. This slows the flow at the tail end in order to promote body and sweetness.

Cafec’s line includes a selection of drippers each intended to be paired with a custom filter. Cafec’s cone filters fit the ceramic Flower Dripper which has a petal shaped interior that promotes flow.