The Complete Guide to Coffee Filter Papers
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Time to read 5 min
In this guide we will take you through the history of coffee filter papers, the different types of coffee filter papers and the correct method to use coffee filter papers!
Coffee, one of the most traded commodities, has wide range of flavours all influenced by different regions, roast, processing, grinding and even brewing.
In this guide, we cover everything you need to know about coffee filter papers, including types, sizes, shapes and how to choose the right one for your setup.
Why Coffee Filter Papers Matter
Paper filters are commonly used for brewing coffee because they help to remove oils and sediments from the coffee grounds, resulting in a cleaner and smoother cup of coffee. The paper filters trap these impurities and allow only the pure coffee extract to pass through, enhancing the flavour and aroma of the final brew. Additionally, paper filters are convenient to use, disposable, and easy to clean up.
A Brief History of Coffee Filter Papers
The modern coffee filter was invented in 1908 by Melitta Bentz.
At the time, coffee was often over-extracted and full of grounds. By using blotting paper inside a perforated cup, she created a cleaner, more balanced brew — a method still used today in both homes and cafés around the world.
Bleached vs Unbleached Filters
Choosing between bleached and unbleached filter papers comes down to taste and preference.
Bleached (white) filter papers
Bleached filter papers are processed with chlorine or oxygen to achieve their white colour and are typically thinner, allowing for a faster brewing process.
- Clean, neutral taste
- Faster flow rate
- Bright white appearance
Unbleached (brown) filters
On the other hand, unbleached filter papers are made from natural fibbers and do not undergo the bleaching process, resulting in a slightly thicker paper that may affect the flow rate and flavour extraction of your coffee.
Unbleached filter papers are undeniably a slightly more sustainable option than that of bleached with less processing at paper mills and being chemical free. You will, however, get a slightly papery taste from unbleached papers. Another downside of the unbleached papers is that there is sometimes some wood fiber left in the filters, which may cause blockage in the pores and uneven extraction. Hence it is vital to wet the unbleached paper before brewing.
- Less processed and more natural
- Slightly thicker
- Can add a faint papery taste if not rinsed
👉 Tip: Always rinse unbleached filters before brewing to remove any paper taste.
Paper Coffee Filter Paper Size and Shape
It is far more important to choose the right sized filter paper for your brewing equipment than the colour of the filter paper. The coffee filter paper sizes:
Common sizes include:
- 1 cup (01 or 1k) → small drippers
- 2 cup (02, 2k or 1x2) → standard pour-over
- 4 cup (1x4, 4k) → most filter coffee machines
- 6 cup+ → office and commercial machines
👉 Most home filter coffee machines use 1x4 filters
Most domestic filter coffee machines take 4 cup filter papers. The shape of the filter you need to get depends on your filter coffee machine. If you have not invested in the filer coffee machine yet, it is worth looking at the machines that take conical filter papers as they are considered better than the basket filters.
Coffee Filter Shapes (Cone vs Flat Bottom)
Cone (V-shaped) Filters
Used in pour-over brewers like drippers
- More even extraction
- Better flavour clarity
Flat Bottom Filters
Used in most filter coffee machines
- More forgiving brewing
- Balanced extraction
👉 Your filter shape should match your brewing equipment.
Paper vs Metal Coffee Filters
Metal Coffee Filters are usually made of stainless steel or aluminium. The advantages of using metal filters are the durability, overall cost in the long run and no wastage.
There are also few disadvantages. The main disadvantage of using metal filter is that it may transfer some unfavourable taste and aroma to the coffee. Secondly, the metal filters are not fine enough to catch all coffee particles, causing the body of your coffee to be heavier than you would have with paper filter. Lastly, they are not as easy to clean, and are not dishwasher safe.
Paper filters
- Cleaner cup
- Less oil and sediment
- Consistent results
Metal filters
- Fuller body
- Reusable and less waste
- More oils and fine particles in the cup
👉 If you prefer clarity and balance, paper filters are the better choice.
Filter Coffee Machines vs Drippers
Not sure which brewing method to choose?
Drippers (pour-over)
- More control
- Manual brewing
- Ideal for coffee enthusiasts
👉 Explore our coffee drippers
Filter coffee machines (drip coffee makers)
- Convenient and consistent
- Ideal for daily use
- Great for brewing larger quantities
👉 Shop filter coffee machines
How to Use Coffee Filter Papers (Step-by-Step)
- Place filter paper in your dripper or machine
- Rinse with hot water (removes paper taste & warms equipment)
- Add freshly ground coffee
- Use water at around 92–96°C
- Pour slowly and evenly
👉 Recommended ratio: 60g coffee per 1 litre of water
Best Coffee for Filter Brewing
Filter coffee highlights origin flavours, so choosing the right beans matters.
We recommend:
- Medium to medium-dark roasts
- Coffees with natural sweetness and balance
- African coffees for brightness
- Central & South American coffees for body and sweetness
Frequently Asked Questions
What is a coffee filter paper?
A coffee filter paper is used to hold ground coffee while allowing water to pass through during brewing. It removes oils and fine particles, producing a cleaner and smoother cup.
Do coffee filter papers affect taste?
Yes, paper filters remove oils and sediment, resulting in a cleaner, lighter cup with more clarity. Metal filters allow more oils through, creating a heavier body.
Should you rinse coffee filter papers?
Yes, especially unbleached filters. Rinsing removes any papery taste and helps preheat your brewing equipment for better extraction.
What size coffee filter do I need?
The size depends on your brewing equipment. Most home filter coffee machines use 1x4 filters, while smaller drippers typically use size 01 or 02.
Which is better, bleached or unbleached coffee filters?
Bleached filters offer a cleaner taste and faster flow rate, while unbleached filters are more natural and less processed but may add a slight papery taste if not rinsed.
Are paper filters better than metal filters?
Paper filters produce a cleaner and smoother cup, while metal filters create a fuller-bodied coffee with more oils and sediment. The best option depends on your taste preference.
What is the difference between cone and flat bottom filters?
Cone filters allow water to flow more evenly through the coffee, resulting in better extraction. Flat bottom filters are more forgiving and commonly used in filter coffee machines.
Can you use any coffee filter in any machine?
No, coffee filters must match the size and shape required by your machine or dripper. Using the wrong type can affect brewing and extraction.
Why does my coffee taste like paper?
This usually happens when unbleached filters are not rinsed before brewing. Rinsing the filter with hot water removes any residual taste.
How many times can you use a paper coffee filter?
Paper coffee filters are designed for single use. Reusing them can affect flavour and hygiene.
What are the best coffee filter papers?
The best coffee filter papers depend on your brewing method. For most home filter coffee machines, 1x4 paper filters are the most popular choice, offering reliable performance and consistent results.
