For pour-over coffee enthusiasts, filter paper is like a “translator” for coffee beans. Choosing the wrong filter paper size can not only lead to leakage and overflow, but also ruin a cup of excellent coffee due to uneven flow.
Are you confused by the dazzling array of numbers like 01, 102, and 185 on the market? Today, DEER COFFEE will completely unravel the secrets of filter paper size for you.
I. Core Logic: Starting with Geometric Shapes
Before choosing the size, you must first look at the “base” of the filter cup. The shape determines the direction of water flow and also the type of filter paper.
- Conical (V-Shape): For layered flavors
Physical characteristics: 60° angle, pointed bottom.
Compatible DEER sizes: V01 / V02 / V03
Compatible brands: Hario V60, Origami, Kono, Starry Night Filter Cups.
Selection guide: * V01 (1-2 servings): Suitable for powder amounts under 15g, extracts approximately 200ml.
V02 (2-4 servings): The industry’s golden size, suitable for powder amounts of 15-30g, with the strongest compatibility. - Fan/Trapezoid: For balanced flavors
Physical characteristics: A straight, narrow line at the bottom.
Compatible with DEER sizes: 101 / 102 / 104
Compatible brands: Melitta, Kalita, common home automatic American coffee machines.
Selection guide:
101 (1-2 servings): Bottom width approximately 40mm.
102 (2-4 servings): Bottom width approximately 50mm. If you have a plug-in drip coffee maker at home, this is the perfect choice.
- Cake Shape (Wave): For consistent extraction
Physical characteristics: Round, flat bottom with 20 ripples around the edge.
Compatible with DEER sizes: W155 / W185
Compatible brands: Kalita Wave series, Fellow Stagg, Blue Bottle filter cups.
II. Rejecting Ambiguity: A Precise Conversion Table of Coffee Grounds and Capacity
We no longer define size using “cup”. Below are the precise parameter derivations for DEER COFFEE:
Filter Paper Type Side Height (mm) Recommended Coffee Grounds (g) Ideal Extraction Capacity (ml)
V01 / 101 ~100 8 – 15 120 – 240
V02 / 102 / W185 ~125 15 – 30 250 – 450
V03 / 104 ~150 30 – 60 450 – 800
DEER Tip: When purchasing, follow the “better too big than too small” principle. Ideally, the edge of the filter paper should protrude 1-2cm above the filter cup. This prevents coffee grounds from being forced into the gap between the filter paper and the filter cup due to excessive water pouring.
III. In-depth Analysis: White vs. Unbleached – Which to Choose?
We frequently receive this question on the DEER COFFEE website. The answer depends on your taste preference:
White (Oxygen Bleaching): Bleached with oxygen, containing no chemical residue. Its advantages are extreme purity, almost no papery taste, and perfect reproduction of the acidity and floral/fruity aromas of light roast beans.
Unbleached (Unbleached): Retains the natural color of wood pulp fibers. Its advantage is greater environmental friendliness. However, please note that a pre-wetting process with hot water is necessary before use to remove any noticeable woody odor.
IV. Frequently Asked Questions (FAQ)
Q: Can a large filter paper be inserted into a small filter cup?
A: Yes, but it requires special folding techniques. However, because the folded areas increase the thickness of the filter paper in certain areas, it may slow down the flow rate and cause over-extraction. It’s okay for temporary use, but not recommended for long-term use.
Q: What is the thickness of DEER filter paper?
A: We use proprietary Dual-crepe technology. This means that even with a fine grind, DEER filter paper maintains stable permeability, effectively preventing bitterness in coffee caused by clogging.
Choosing the right filter paper size is the first step to consistent quality. At DEER, we are committed to providing you with high-quality filter paper that best conforms to the physical principles of extraction.
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