What role does the pore size play in the coffee filter?

Some coffee filter manufacturers advertise that their pores are "extra fine" for a particularly aromatic coffee. What's up there? Is the pore size of the filter really decisive for the taste?? Find out below.

Does the pore size influence the taste of the coffee??

Yes. The pore size of the filter actually has a very decisive influence. If you have the time and inclination, do an experiment: Instead of your coffee filter, maneuver a tea filter into the holder, fill it with the appropriate amount of coffee powder and see what happens. First, you'll notice that the brewing process takes a lot longer than usual. And when you try the coffee you will notice that it tastes a little bitter, stronger and possibly a little sour. This is because the pores of tea filters are finer than coffee filters. As a result, the water takes longer to penetrate through the coffee powder and the filter and thus absorbs more aroma than normal. In technical jargon this is called "over-extraction": Too many ingredients of the coffee are absorbed, which has a negative effect on the taste.

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The other way around, if you use a filter that has too large pores, e.g.B. a thin cotton cloth, the water will run through too quickly and will not absorb enough aroma. The result will be a weak, not very aromatic coffee. This phenomenon is called "under-extraction".

You should pay attention to the pore size when buying?

No. That would probably not be possible either, since the pore size is not even noted on the pack. The coffee filter was invented over a hundred years ago and has so far been perfected to such an extent that the pore size is adjusted so that the water remains in contact with the coffee powder for about three minutes, so that a perfect extraction can take place. This applies to all coffee filters. If coffee filters advertise that their pores are extra fine, this is possible from a purely linguistic point of view, but the pore size does not differ from that of other brands, because if the pores are too fine, it would not be a nice coffee experience, as described above.


Just buy your favorite coffee filters as usual and don't be confused by advertising measures such as "extra fine pores" or "3-zone aroma". The pore size of coffee filters is uniformly geared towards an optimal extraction time - regardless of whether the filter bags cost one or three euros.