Etched Metal Coffee Filter Manufacturer Custom Stainless Steel Etched Filter Processing Xinhaisen Precision Etching
Product Details
| Materials: | Stainless Steel Or Customized | Thickness: | 0.02mm - 1.5mm |
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| Tolerance: | +/- 0.005mm | Production Process: | Photo Chemical Etching, Plating, Stamping, Laser Cutting |
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Product Description
Etched Metal Coffee Filters | Food-Grade Stainless Steel Etching | Reusable with No Fine Particles | Customization Available
I.Description:
These metal coffee filters are manufactured using a photochemical etching process. Made from food-grade SUS304 stainless steel as the base material, they feature uniform micro-pores formed through precision etching. Compared to traditional woven mesh, etched filters have smooth, burr-free pore walls that prevent coffee grounds from getting stuck and are easy to clean, while fully preserving the coffee’s oils and flavor profiles. Full customization of pore size, open area ratio, and shape is available, making them suitable for pour-over coffee, espresso machines, and commercial coffee equipment.
II. Specifications, Parameters, and Material Description
Material Selection
Food-grade SUS304 stainless steel is the preferred material for etched coffee filters; SUS316L may be selected for certain high-end applications. Both offer excellent corrosion resistance and food safety. Materials must pass SGS testing to ensure they are free of harmful substances such as heavy metals, plasticizers, and bisphenol A.
Standard Material Thicknesses
Common thickness ranges for coffee filters are 0.05 mm to 0.5 mm. For pour-over filters, 0.1 mm, 0.15 mm, and 0.2 mm are the most common, while secondary distribution screens for espresso machines typically use 0.3 mm and 0.4 mm. Thickness selection must balance filtration precision and structural strength—too thin a material is prone to deformation, while too thick a material impedes flow rate.
Pore Shape and Arrangement
A unique advantage of the etching process lies in the freedom it offers for pore shape design. Coffee filters typically feature circular micropores with pore diameters ranging from 15 μm to 60 μm, and an open area ratio controlled between 5% and 30%. Pores can be arranged in a 60° staggered pattern or a 90° orthogonal pattern; the former aids in even flow distribution, while the latter is simpler to manufacture. Between 40 and 200 micropores can be arranged per square millimeter, with specific parameters determined by the target flow rate and filtration precision.
Standard Sizes
Pour-over filters are available in sizes suitable for 1–2 servings or 2–4 servings. Common diameters for second-stage distribution screens in espresso machines include 51 mm, 53 mm, 53.5 mm, 58 mm, and 58.5 mm. Non-standard sizes can be customized to fit the customer’s equipment interfaces.
III. Key Advantages of Etched Coffee Filters
1. Solves the “Difficult to Clean” Problem
The intersecting nodes of traditional woven mesh filters are highly prone to coffee grounds buildup, leading to the accumulation of grease and unpleasant odors over time. The micropores in etched filters are formed as a single piece through chemical dissolution; their smooth walls and lack of intersecting structures prevent fine coffee grounds from adhering. They can be restored to cleanliness with a simple rinse of clean water, without the need for soaking in enzymatic cleaners.
2. No Metallic or Greasy Aftertaste
Food-grade SUS304 stainless steel is chemically stable and does not react with the acidic compounds in coffee. The etched surface has none of the gaps or dead corners found in woven mesh, preventing the buildup of stale grounds that cause off-flavors. Every cup delivers the coffee’s true, authentic flavor.
3. Fully Preserves Coffee Oils
The pore size design of metal filters allows coffee oils to pass through, whereas paper filters absorb them. Since these oils carry a wealth of aromatic compounds and flavor nuances, coffee brewed with etched filters has a fuller body and more distinct floral and fruity notes.
4. Adjustable Flow Rate, Customizable Flavor
By adjusting pore size and open area ratio, the flow rate of the etched filter can be precisely controlled. A slightly slower flow rate highlights a rich, lingering aftertaste; a moderate flow rate balances flavors across the front, middle, and back notes; and a slightly faster flow rate enhances the fruity acidity in the front notes.
5. No Burrs, No Warping, High Precision
Photochemical etching generates no mechanical stress, resulting in no burrs, no warping, and no hardening after processing. Pore diameter tolerances can be controlled within ±0.01 mm, and the uniformity of micro-pore distribution far exceeds that of stamping or laser perforation.
IV. Auxiliary Processes Available in Addition to Etching
Xinhaisen not only provides core etching services but also offers the following auxiliary processes to enable one-stop delivery of coffee filters:
| Auxiliary Processes | Description |
| Surface Treatment | Electrolytic polishing (to enhance surface finish and corrosion resistance), dyeing (appearance options such as gold or black), and application of a transparent protective coating |
| Stamping/Die-Cutting | Die-cutting of the outer contour after etching; suitable for high-volume, standardized products |
| Adhesive Laminating | Applying food-grade adhesive to the edges of the filter for easy installation and securing |
| Stamping | Stamping flat filter sheets into three-dimensional shapes such as bowls or cones |
| Diffusion Welding | Laminating multiple filter layers to create a gradient filtration structure |
| Laser Cutting | Rapid cutting of large-sized outer contours |
V. Manufacturing Process
The complete production process for etched coffee filters is as follows:
Preliminary Preparation Stage
1.Drawing Confirmation — The customer provides CAD/CDR/AI/PDF drawings or samples
2.Film Output — Converting design drawings into high-precision photomasks
3.Material Preparation — Cutting SUS304 stainless steel coils to the required dimensions
Core Etching Stage
4.Degreasing and Cleaning — Thoroughly remove oil and oxide layers from the sheet surface
5.Coating/Screen Printing — Apply photosensitive resin to both sides of the sheet or print acid-resistant ink
6.Exposure — Transfer the pattern to the photosensitive layer using UV light through the film
7.Development — Remove the photosensitive resin from unexposed areas, exposing the metal to be etched
8.Etching — Immerse the sheet in etching solution; the exposed metal is chemically dissolved to form micropores
9.Stripping — Alkaline washing to remove protective ink/photosensitive resin
Post-Processing Stage
10.Cleaning and Inspection — Check pore size, open area ratio, and appearance
11.Post-Processing — Electrolytic polishing, dyeing, spraying, etc. (as needed)
12.Contour Punching — Stamping or die-cutting to the final contour according to drawings
13.Final Inspection and Packaging
VI. Packaging Methods
Etched coffee filters are precision thin-sheet products; packaging must provide protection against moisture, scratches, and deformation:
- Inner Protection: Each filter is separated by dust-free paper or bubble wrap to prevent surface scratches
- Support Structure: Supported by cardboard tubes or rigid backing boards to prevent bending or deformation during transport
- Waterproofing: Wrapped in waterproof paper or vacuum-sealed bags
- Outer Packaging Selection: Corrugated cardboard boxes or wooden crates, determined based on batch size and shipping distance
- Custom Labeling: Customer labels and printed logos can be applied; neutral packaging is supported
VII. About Xinhaisen
Shenzhen Xinhaisen Technology Co., Ltd., established in 2006 and located in Shajing Town, Shenzhen, Guangdong Province, is a high-tech enterprise specializing in precision metal etching.
Core Capabilities:
- Processing Thickness Range: 0.02 mm to 1.5 mm
- Minimum Micro-hole Diameter: 0.03 mm
- Minimum Line Diameter: 0.015 mm
- Etching Uniformity: ±0.03 mm
- 6 Fully Automated Etching Production Lines
- Production Capacity: 1,000 mm² level
Product Sectors: Telecommunications, acoustics, optics, medical, security, machinery, aerospace, and home appliances. Specific products include coffee machine filters, mobile phone speaker grilles, various precision filters, heat spreaders, and flow channel plates.
Service Advantages: We support both small and large batch orders, offering free technical solutions and rapid prototyping. We provide one-stop services including metal stamping, adhesive-backed die-cutting, and surface treatment, reducing customers’ multi-source procurement costs.
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VIII. Frequently Asked Questions (FAQ)
Q1: What is the key difference between etched coffee filters and woven mesh filters?
A: Woven mesh is made by interlacing metal wires, and the gaps at the intersections can trap coffee grounds; etched filters are created by chemically dissolving microscopic pores into a solid metal sheet. The pore walls are smooth and lack an interlaced structure, preventing coffee grounds from getting stuck, making them easy to clean and free of metallic taste.
Q2: Do etched filters allow fine grounds to pass through?
A: Pore size can be precisely controlled to the design specifications. When used with the correct pouring technique (a vertical, fine stream or pouring with pressure), the amount of fine grounds at the bottom of the cup is significantly less than with woven filters. If you’re seeking the utmost clarity, you can use an ultra-fine filter paper in combination, though this will result in some loss of oil-based flavors.
Q3: Can you customize filter screens for different flow rates?
A: Yes. By adjusting the pore size and open area ratio, we can design three flow rate options: slow (rich, lingering finish), medium (balanced flavor), and fast (bright, fruity acidity).
Q4: What is the minimum order quantity?
A: There is no strict minimum order quantity for prototypes; mass production depends on the size and complexity of the process. We welcome inquiries with drawings or samples.
Q5: Are the filters dishwasher-safe?
A: Made of SUS304 stainless steel, which is heat-resistant, the filters are dishwasher-safe. We recommend placing them in the top rack of the dishwasher to avoid deformation caused by strong water jets.
Q6: Can a brand logo be etched onto the filter mesh?
A: Yes. The etching process is naturally suited for integrating graphics and text into a single molded part; the logo can be etched simultaneously with the micro-pores without requiring additional steps.
Q7: How long does it take from prototyping to mass production?
A: With drawings or samples provided, the prototyping cycle typically takes 2–3 days; the mass production cycle depends on quantity and process complexity, typically taking 5–10 business days.
Product Highlights
Etched Metal Coffee Filters | Food-Grade Stainless Steel Etching | Reusable with No Fine Particles | Customization Available I.Description: These metal coffee filters are manufactured using a photochemical etching process. Made from food-grade SUS304 stainless steel as the base material, they ...
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