In order to let water flow at an ideal speed for each roasting level,
each paper is made by different paper structure. Water speed is
adjusted automatically thanks to the different structure.
Light Roast Paper Filter
There is no crepe inside the filter paper, so the inside surface area
is small. Fine coffee powders attach within this small area, so little
water path is left, and the water will build up inside the paper filter.
By building up water, plenty of aroma comes out. Furthermore, thanks to
the outside crepe, the liquid coffee flows smoothly.
Because its paper density is high, almost all fine powder is removed
perfectly. You get a clean cup of coffee full of aroma.