English
Background
Mastars applies photochemical etching on thin stainless sheet, then roll-forms, seam-welds, and electropolishes to deliver burr-free, zoned-porosity sleeves with predictable flow, fast design turns, and long service life.
The challenge
Juicer filters need tight control of hole size and open area to balance yield and pulp retention. Punching or laser drilling can leave burrs, heat tint, and shape drift that cause clogging, scraper wear, and frequent stops. Rapid pattern iteration across fruits is difficult when each change requires hard tooling.
Mastars solution
Mastars uses photochemical etching on flat 304/316L stainless backed by digital artwork zoning. Etched panels are precision roll-formed, laser or micro-resistance seam-welded, then electropolished and passivated. Inline optical inspection maps hole geometry and open area by zone; roundness, seam strength, and flow are validated before shipment. The same photochemical etching workflow scales from pilot runs to volume with full traceability.
System features
Quality package: AOI 100%, flow/pressure-drop checks, seam burst/torque tests, traceable lots
Benefits
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✅ Burr-free micro-perforation via photochemical etching lowers clogging, reduces blade wear, and extends run time
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✅ Predictable flow and pulp profile through tight hole-size control and zoned porosity maps
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✅ Fast design iteration as digital masks for photochemical etching update in days
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✅ Stable geometry with controlled roundness and seam integrity for uniform gaps to rotating elements
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✅ Cleanability improved by electropolished surfaces that resist residue adhesion
Use cases
Juicer and beverage filters: centrifugal and masticating juicers, cold-press pre-screens, clarifying stages, seed removal drums.
Beyond juicers — applications of photochemical etching:
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