Rectangle semi-rimless eyeglass frames combine a defined upper brow line with an open lower lens edge, creating a lightweight, architectural profile for professional optical collections. The rectangular geometry offers a structured aesthetic without the visual mass of a full-rim construction, making it an essential silhouette in contemporary optical markets.

Engineered across multiple material platforms, these frames support flexible production workflows-including custom colorways, private-label branding, and manufacturing based on technical drawings or physical reference samples.

Baseline Technical Parameters

Specification Parameter	Standard Options / Range
Product Type	Optical Eyeglass Frames (Non-sunglasses unless specified)
Frame Shape	Rectangular
Rim Construction	Semi-Rimless / Half-Rim
Primary Materials	Metal Alloy, TR90, Acetate (Model-dependent)
Lens Retention System	Nylon Cord / Precision Wire-Locking Groove
Size Parameters	Lens Width, Bridge Width, Temple Length, Lens Height, Overall Width (Customized per model)
Hinge Mechanism	Standard Barrel, Spring Hinge, or Screwless (Model-specific)
Nose Pads	Adjustable silicone/metal pads or integrated saddle bridge
Surface Finish	Electroplating, Glossy Polish, Matte Finish, Laser Etching

Structural Architecture & Technical Specifications

Rectangle semi-rimless optical frames rely on a dual-component architecture designed to balance facial structure with minimal visual weight.

Upper Brow Frame: Supports the upper half of the optical aperture and houses the bridge structure. Fabricated via CNC milling or high-pressure shaping to ensure exact groove depth and surface symmetry.

Lower Lens Retention System: Secures the exposed lower lens edge utilizing a high-tensile nylon cord (or wire-locking mechanism) seated into a precision-milled V-groove.

Hinge & Temple Integration: Equipped with standardized barrel hinges, spring hinges, or block hinges to ensure consistent temple tension and long-term durability.

Material Platform Options

Material Category	Key Mechanical Characteristics	Typical Semi-Rimless Application
Metal Alloys (Monel, Stainless Steel, Titanium)	High tensile strength, thin profile, adjustable nose pads, premium metallic finishes (plating/IP plating).	Sleek, executive, and lightweight business optical frames.
TR90 (Polyamide)	Ultra-lightweight, high flexibility, excellent memory retention, hypo-allergenic.	Active, flexible, everyday lightweight optical collections.
Acetate (Hybrid / Reinforced)	Rich color depth, premium tactile feel, requires specific core wire and structural reinforcement for semi-rimless stability.	Fashion-forward hybrid optical frames with structured upper brows.

Customization & Private-Label Workflows

Design Prototyping: Submit 2D/3D CAD drawings or physical reference samples for structural feasibility and tolerance reviews.

Color & Finish Customization: Pantone-matched frame colors, matte/glossy finishes, and specialized metal platings (Gold, Gunmetal, Rose Gold, Silver, etc.).

Custom Branding: Laser engraving on inner temples, metal logo plaques, or pad-printed brand names.

Accessory Integration: Pair frames with matching custom-branded hard cases, microfiber cleaning cloths, pouches, and outer paper boxes.

Quality Control & Inspection Protocols

To ensure batch-to-batch consistency, factory quality control protocols cover measurable production checkpoints prior to export:

Dimensional Verification: Checking lens width, bridge size, temple length, and diagonal measurements against approved sample tolerances.

Symmetry & Alignment: Verifying left-right symmetry, vertical alignment of the temples, and face-form angle.

Hinge Endurance & Function: Testing smooth rotation, screw torque retention, and spring tension (where applicable).

Lens Retention Security: Ensuring the lower nylon cord is securely locked and capable of withstanding normal prescription lens mounting pressure.

Surface Defect Screening: Inspecting for plating bubbles, scratches, color inconsistencies, or polishing residue under standard lighting.

Packaging & Logistics Specifications

To safeguard delicate semi-rimless frames during international transit:

Individual Protection: Each frame is encased in a protective polybag or sleeve to prevent surface scratching.

Internal Box Configuration: Grouped securely with compartmentalized inner cartons to resist shock and compression.

Export-Grade Master Cartons: Multi-layer corrugated cartons labeled with detailed item descriptions, barcodes, and gross/net weight indicators as required by logistics channels.

Frequently Asked Questions

Q: What is a rectangle semi-rimless eyeglass frame?

A: It is an optical frame featuring a rectangular lens shape where only the upper portion of the frame encloses the lens. The lower edge is typically held in place by a high-tensile nylon cord fitted into a precision lens groove.

Q: Can these frames hold prescription (Rx) lenses?

A: Yes. When paired with appropriate lens materials (such as high-index or polycarbonate lenses) and fitted by a qualified optician, semi-rimless frames provide a secure, clean aesthetic for everyday prescription wear.

Q: What is the Minimum Order Quantity (MOQ) for custom or wholesale orders?

A: MOQ varies depending on the specific model, material platform, and level of customization required. Please submit your project scope to receive a precise MOQ quotation.

Q: Can frames be manufactured based on our proprietary design?

A: Yes. Comprehensive OEM and ODM services are available. You can provide 3D/2D CAD files or physical samples, and our technical team will evaluate manufacturing feasibility, tooling needs, and lead times.

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