The single biggest cause of prototype revisions is not engineering complexity \u2014 it is miscommunication between the brand and the factory. A vague sketch, an ambiguous reference photo, or a missing dimension can send a mold worth $500-800 back for re-machining.<\/p>\n\n\n\n
After developing custom molds for 500+ brands, here is exactly how to communicate your eyewear design so the factory builds what you actually want \u2014 the first time.<\/p>\n\n\n\n
Not all brands arrive with the same preparation. The more you move toward a complete spec, the faster and cheaper your mold development will be.<\/p>\n\n\n\n
Level 1 \u2014 Full Spec.<\/strong> You have a 3D CAD file, dimensioned drawings, material and hardware specifications. The factory needs nothing else from you; the design is ready for mold making. Expect 0-1 revision rounds.<\/p>\n\n\n\n Level 2 \u2014 Good Reference.<\/strong> You have a physical reference frame plus clear notes on what to keep and what to change. The factory needs confirmation on which dimensions stay and which change. Expect 1-2 revision rounds.<\/p>\n\n\n\n Level 3 \u2014 Visual Only.<\/strong> You have photos, sketches, or a mood board. The factory needs you to fill in dimensional specifications. Expect 2-3 revision rounds.<\/p>\n\n\n\n Level 4 \u2014 Concept Only.<\/strong> Your brief is “something like a classic round frame but more modern.” The factory needs everything from you \u2014 expect an extended design consultation and 3 or more revision rounds.<\/p>\n\n\n\n The gap between Level 4 and Level 1 is not talent \u2014 it is information. The paragraphs below tell you exactly what to prepare.<\/p>\n\n\n\n You do not need a complete engineering drawing. But four numbers matter: lens width, bridge width, temple length, and total frame width. Add your material choice \u2014 acetate<\/a>, metal<\/a>, titanium<\/a>, or TR90 \u2014 and the factory can begin feasibility assessment.<\/p>\n\n\n\n If you have a physical reference frame, the strongest move is to send it to the factory for 3D scanning. That captures every dimension precisely \u2014 more accurately than any photo or verbal description. You can then specify changes: “same bridge, temples 5mm longer,” “same lens shape, 3mm wider overall.”<\/p>\n\n\n\n Describe the silhouette you want: round, square, cat-eye, aviator, geometric, or something else. Then say who it is for. This matters more than most brands realize \u2014 a frame that fits a European face (narrower bridge, higher nose) will not fit an Asian face well. Specify your primary market, and the factory will adjust bridge width and face-form curvature accordingly.<\/p>\n\n\n\n Hinge type \u2014 standard three-barrel, five-barrel, or spring hinge \u2014 determines how the frame feels when it opens and closes. Hinge finish \u2014 gold, silver, rose gold, or gunmetal \u2014 must coordinate with your frame color and brand identity. Surface treatment \u2014 high gloss, satin matte, or a combination \u2014 and whether the frame is hand-polished or barrel-polished only, is the difference between a
\n\n\n\nThe Four Groups of Information Your Factory Needs<\/h3>\n\n\n\n
1. Material and Dimensions: What It’s Made Of and How Big<\/h4>\n\n\n\n
2. Shape and Fit: What It Looks Like and Who It’s For<\/h4>\n\n\n\n
3. Hardware and Finish: The Details That Define Quality<\/h4>\n\n\n\n