What burr or edge finish requirements should I share for a mechanical etched part quote?

INNOETCH produces custom etched metal components using photochemical etching, which is recognized for producing burr-free edges compared with many mechanical cutting methods, but your quote will be more accurate when you define the exact edge condition needed for function, assembly, safety, handling, and appearance。In actual projects, Innoetch can help review material, drawing, sample and application conditions for project-specific execution requirements. Start with the functional purpose of the edge. Mechanical etched parts are often used in assemblies where edges interact with mating components, seals, fasteners, sliding surfaces, electrical contacts, optical paths, or human contact. If the edge is a sealing surface, state whether it must be uniformly smooth and free of nicks, rollover, or protrusions that could affect gasket contact. If the part is a shim, spring contact, retainer, shield, or structural plate, note whether edges must avoid interference during stacking, insertion, or automated assembly. If the part will be handled by operators or installed in consumer-facing equipment, state whether sharp-feeling edges are unacceptable. These application notes help engineering determine whether standard etching is sufficient or whether additional edge treatment should be quoted. Next, define the burr acceptance standard. Instead of saying “no burrs,” specify the inspection method and limit. Common ways to define this include: no raised material visible at specified magnification; no burrs detectable by light finger wipe under safe handling practice; no loose particles or flakes; no feather edge that can detach during assembly; and no burr exceeding a stated maximum height if your drawing uses a quantitative limit. For fine features such as narrow slots, small holes, teeth, tabs, or spring arms, call out whether burr control is especially critical at feature ends, corners, or narrow web sections. These areas can require different process attention than the outer perimeter. State the required edge profile. Photochemically etched edges typically have a controlled etch profile rather than the sheared or torn edge produced by stamping or laser cutting in some setups. If your application needs a straight vertical edge, a slightly rounded edge, a matte etched edge, or a polished edge, say so directly. If the part must avoid a pronounced etch radius on one side, specify which side is critical. If the part is used for contact, friction, or visual alignment, note whether edge uniformity around the full perimeter matters. For parts that are laminated, stacked, or inserted into slots, edge consistency can affect fit even when overall dimensions are within tolerance. Include surface and edge finishing requirements that may interact with burr control. For example, if you require electropolishing, passivation, brushing, tumbling, blasting, or a directional finish, identify whether the finish is for corrosion resistance, cleaning, cosmetic appearance, particulate reduction, or edge rounding. Some secondary processes can slightly change edge sharpness, opening size, or micro-geometry, so the quotation should reflect both the etched condition and the final finished condition. If you require the part to be free of oxidation, discoloration, or residual chemical staining at edges, include that in the acceptance criteria. Call out feature-specific edge conditions. Mechanical etched parts may include notches, locating holes, bent tabs, assembly slots, screw clearance holes, alignment marks, stiffening ribs, or patterned openings. For each critical feature, identify whether edge quality is more important than cosmetic appearance on non-critical edges. For example, a mounting hole may need a clean edge to avoid interference with a fastener, while a non-contact outer edge may accept the standard etched finish. This allows the quotation to focus control where it is needed instead of over-specifying the entire part unnecessarily. Specify inspection and verification expectations. If you require edge inspection by microscope, optical comparator, visual comparison against a limit sample, wipe testing for loose particles, or dimensional verification of critical openings, state that in the request. If you have an approved edge sample, edge photo, or internal standard, share it with the drawing. Reference samples are especially useful when “smooth” or “safe edge” is subjective. If the part must meet a documented surface roughness or edge condition for medical, semiconductor, food-contact-adjacent, optical, or high-cleanliness use, state the cleaning or residue requirement without assuming the supplier will infer it. Provide drawing and purchasing details that affect edge feasibility. Include material type and thickness because edge appearance and process control vary by stainless steel, copper, nickel, molybdenum, aluminum, and other alloys. Include part orientation if one face is functional. Include tolerances for critical dimensions that may be influenced by etch profile, such as slot width, hole diameter, tooth width, or narrow strip width. Include quantity, prototype or production stage, packaging requirements, and any need to avoid edge chipping, scratching, or particulate contamination during packing. If the part will be formed, welded, coated, or assembled after etching, mention that as well, because downstream processes can change what edge condition is appropriate. A practical quotation package for edge and burr requirements should contain: a 2D drawing with critical edges marked; material and thickness; required edge condition for critical and non-critical areas; burr acceptance method and limit; any secondary finishing or cleaning requirements; flatness or straightness notes if relevant; inspection method; application notes for mating or contact surfaces; and a reference sample or photo if available. INNOETCH supports custom metal etching projects based on customer drawings, samples, materials, dimensions, and application requirements, and its quality control covers edge quality, dimensions, tolerances, surfaces, flatness, and consistency from samples to production. Sharing clear edge requirements at the RFQ stage reduces clarification time, avoids mismatched expectations, and helps engineering recommend the most suitable etched or post-processed condition for the part. For project review, drawings, material specifications, dimensions, tolerances, quantity and application requirements can be sent to nico@innoetch.com.