Overview

A custom nickel food screen is the precision perforated element used for fine filtration, grading and dewatering in food and beverage processing, from juice clarification and powdered-sugar sifting to coffee extraction and dairy filtering, where it holds particle size inside a defined band. Photochemical etching cuts thousands of holes, along with stiffening ribs, framed borders and mounting holes, out of 0.10–0.60 mm pure nickel Ni200/Ni201, nickel-copper alloy or 316L stainless sheet in one pass. Because the metal is dissolved rather than punched, the part leaves the line burr-free with smooth hole walls and no loose metal slivers, so it does not trap residue and cleans down easily, which is exactly what a food-contact component is judged on.

For equipment and QA engineers, a custom nickel food screen is valued for three things: uniform aperture, cleanability and corrosion resistance. Nickel stays stable in mildly acidic, sugary and saline media, and after electropolishing the surface roughness is controlled so product does not cling; the screen holds shape through CIP cleaning and hot sanitation without shedding. A single film images a whole panel of screens, so every hole etches at the same rate and open area and throughput repeat within a lot, while a change of aperture or outline means a new film rather than a new die, which suits multi-SKU food lines that change over often.

Parameter Window

• Available Materials: pure nickel Ni200/Ni201, nickel-copper alloy, 316L stainless, 304 stainless, Monel
• Material Thickness Range: 0.10–0.60 mm, with framed borders and locally reinforced zones
• Tolerance: ±0.02 mm on aperture and outline, about ±10% of stock thickness on half-etched features
• Minimum Feature: 0.15 mm hole, 0.20 mm web, 0.30 mm hole pitch
• Surface Options: electropolish, passivation, food-grade precision cleaning, controlled surface roughness, deburred edges
• Compliance: ISO 9001 process control, RoHS/REACH material traceability

Manufacturing Process / Workflow (8 Steps)

1. Artwork Review — Convert the drawing to vector artwork, check hole-to-web ratio, border width and open-area target, then confirm the panel layout.
2. Material & Temper Selection — Choose nickel grade and temper for the product medium, then verify incoming thickness, flatness and surface finish.
3. Cleaning & Lamination — Degrease and micro-etch, then hot-roll dry film matched to the smallest hole so no resist tents over fine apertures.
4. UV Exposure — Expose both sides through high-resolution film with front-to-back fiducials registered so holes align through the thickness.
5. Development & Inspection — Wash out unexposed resist and check every panel for fully opened holes and any missing or bridged webs.
6. Etching — Spray alloy-matched chemistry; time, temperature and spray pressure set hole-wall quality, with framed zones left at full thickness.
7. Stripping & Finishing — Strip and neutralize, electropolish to a controlled roughness, passivate, then precision-clean for food contact.
8. Inspection & Packaging — Measure aperture, open area and surface finish against the approved sample, then pack in clean protective trays.

Core Advantages

1. Burr-free, sliver-free holes: Chemical removal leaves no rolled edge or loose metal, so the screen cannot shed particles into the product stream.
2. No hard tooling: A new aperture or outline is a new film, so frequent SKU changeovers carry no die cost and prototypes take days.
3. Easy to clean: Smooth electropolished walls and controlled roughness resist buildup and clean down fully under CIP and hot sanitation.
4. Corrosion resistant: Nickel handles mildly acidic, sugary and saline media, holding aperture and shape over long production campaigns.
5. Full-panel uniformity: Screens on one sheet etch at the same rate, so open area and throughput repeat within a lot and across lots.
6. Material and finish flexibility: Pure nickel, nickel-copper and 316L run on the same line, so a custom nickel food screen can be electropolished to a specified roughness for the product.

Typical Applications

• Juice clarification: Fine screens that remove pulp and seed fragments while keeping target yield and throughput.
• Powder sifting: Sugar, flour and starch grading screens with uniform apertures for consistent particle cut points.
• Coffee and tea filtration: Brew baskets and extraction screens where clean release and no off-flavor matter.
• Dairy processing: Whey and curd separation screens that tolerate hot wash-down and saline products.
• Food drying trays: Perforated trays and belts that support product while letting air and moisture pass.
• Brewing and edible oil: Lautering and pre-filter screens that resist acidic or oily media over repeated cycles.

Design Notes & Process Considerations

1. Hole-to-web ratio: Keep the web at 0.20 mm or 1.2 × material thickness, whichever is larger, or holes will merge and the panel will lose strength.
2. Open area and strength: Balance open-area percentage against border and rib width, since a very open screen needs a stiffer frame to stay flat.
3. Surface roughness: State a target roughness and electropolish requirement; a rough wall traps product and raises cleaning time and microbial risk.
4. Half-etch or frame depth: Call out target depth and tolerance for reinforced zones and say whether the frame is left full thickness on one or both faces.
5. Handling and cleanliness: Thin, highly open panels dent easily; use shared fiducials, generous margins and clean protective packaging.
6. Drawing completeness: Put alloy, thickness, aperture map, open area and surface spec on the drawing in one pass; for a custom nickel food screen these fields cut most of the back-and-forth.