Blog | MASCOT Jewelry — S925 Sterling Silver Jewelry Factory

Oxidized Silver (Thai Silver): The Chemistry Behind Vintage Jewelry 10-22-26

What is Oxidized Silver?Oxidized (Thai) Silver is 925 silver surface-treated with sulfide to form a black silver sulfide (Ag₂S) layer. Raised areas are polished bright while recesses stay dark, creating a vintage contrast.The ChemistrySilver reacts with sulfur compounds: 4Ag + 2H₂S + O₂ → 2Ag₂S (black). This happens naturally—that's why silver tarnishes. Oxidized silver intentionally accelerates and controls this process.ProcessPolished silver dipped in potassium sulfide solution (seconds to minutes)Even black Ag₂S film formsRaised details brushed/polished brightRecesses remain black for vintage contrastOptional clear lacquer sealMarket TrendOxidized silver has trended strongly in 2024–2026: stackable rings, dark-style pendants, vintage earrings. Target demographic: ages 18–35 seeking individuality. Retail price premium: 20–30% over bright-finish silver.Browse our oxidized collection or inquire about custom orders.

Lost Wax Casting: The Core Process for Complex Silver Jewelry 10-22-26

What is Lost Wax Casting?Lost Wax Casting (Investment Casting) is a 5,000-year-old metal forming process. Modern jewelry uses it for nearly all complex pieces: openwork pendants, detailed rings, 3D earrings.ProcessWax model: 3D printed or hand-carved wax of each pieceTree assembly: 20–50 wax models attached to a wax sprueInvestment: Tree dipped in plaster slurry, 6–8 layersWax burnout: Steam/oven melts out the wax, leaving a plaster cavityPouring: 925 silver melted at 900°C and poured inKnockout: Plaster broken after cooling, revealing the silver treeFinishing: Cut, file, polish, platePrecision & CostTolerance ±0.1mm, capable of 0.3mm openwork details. MOQ typically 50 pieces. Unit price decreases with volume: 50 pcs highest, 500 pcs −20%, 1000 pcs −35%.Contact us for lost wax casting quotes.

MOQ in Silver Jewelry: Why Factories Require 50 Pieces and How to Negotiate 10-22-26

How is MOQ Calculated?MOQ is the break-even point covering fixed costs:Mold fee: $70–$420 (fixed)Setup/prototyping labor: 1–2 days (fixed)Electroplating bath minimum batch (fixed)QC and packaging: per piece (variable)Spread across 10 pieces, fixed costs add $28/piece; across 50 pieces, $5.60/piece; across 200 pieces, $1.40/piece.MOQ by CategoryCategoryStandard MOQNegotiableRings (simple)50 pcs20 pcsNecklaces / pendants50 pcs30 pcsEarrings50 pairs30 pairsCustom logo engraving100 pcs50 pcsStrategies for New BrandsMix styles: 30 pieces per design, 3 designs = 90 pieces total, MOQ calculated on total.Pay mold fee: Factory waives MOQ but mold fee is non-refundable ($70–$210). Good for test designs.Small first order, fast reorder: 30 pieces to test market, then 200-piece reorder. Factories relax terms after trust is built.We support 50-piece MOQ and 20-piece trial orders. Contact us for a plan.

Why Silver Tarnishes: Customer Service Scripts and Care Instructions 10-22-26

Why Does Silver Tarnish?Silver reacts with sulfur compounds in air or sweat:4Ag + 2H₂S + O₂ → 2Ag₂S (black)Silver sulfide forms a black film on the surface. This isn't rust—it's natural to all silver, even ancient silver artifacts excavated today are black.Who Tarnishes Faster?People with high-sulfur sweat (high meat diet, athletes)Hot spring / swimming pool exposure (chlorine)Sulfur soap, sulfur skincare productsHumid environments (rainy season in the south)Standard Customer Service Script"Hello, tarnishing is a natural physical property of pure silver, not a quality issue. Silver reacts with sulfides in air to form a black silver sulfide film. Simply polish with a silver polishing cloth to restore shine. Avoid hot springs, perfume, and sweat to slow tarnishing."Care Instructions (print on packaging card)Store in airtight bag when not wornAvoid perfume, cosmetics, hot springsRemove before showering or swimmingUse a polishing cloth regularly (avoid liquid silver dips—they damage plating)Contact us for care card design templates.

OEM vs ODM: Which Model Should Your Jewelry Brand Choose? 10-22-26

What is OEM?OEM (Original Equipment Manufacturer): YOU provide the design, the factory manufactures it. You handle design, marketing, sales; the factory handles production only.Best for: established brands with in-house design teams that need strict style copyright control.What is ODM?ODM (Original Design Manufacturer): the FACTORY provides designs; you select styles, add your logo, and resell. The factory has an existing style library ready to go.Best for: new brands, small teams, no design resources—want to list products fast.OEM vs ODM ComparisonDimensionOEMODMDesign sourceBrandFactoryMold fee$70–$420 extraNone (existing styles)Unit priceHigher (custom)Lower (volume amortized)MOQ50 pcs20–30 pcsTime to market15–30 days3–7 daysStyle exclusivityYesNo (other buyers can order)How to Choose?Startups: Start with ODM to test the market, then develop OEM exclusive styles for winners.Established brands: Full OEM to protect style copyright.Hybrid: 60% ODM (volume drivers) + 40% OEM (hero styles).We offer both OEM and ODM services. Contact us for our style library.

S925 Hallmark Requirements: International Standards for Silver Jewelry Export 10-22-26

Why Hallmarking Is MandatoryPrecious metal hallmarking is a legal requirement, not optional. Each major market has regulators:USA: FTC requires purity marking. Violations: up to $10,000 per piece.UK: Assay Office mandatory hallmarking. Sterling must be stamped "925".EU: Varies by country, but 925 silver generally requires "925" or "Sterling".China: GB 11887 mandates purity marking.Common Hallmark SymbolsMarkMeaningMarketsS92592.5% pure silverChina, general92592.5% pure silverInternationalSterlingStandard sterlingUS, UKAg925Element symbol + purityEuropeExport PitfallsQ: Can I stamp just my logo without purity?A: No. Logo-only stamps without purity are "misrepresentation" under US FTC rules. Amazon will delist.Q: Does gold-plated silver need a stamp?A: Yes. Even with gold plating over silver base, you must mark "S925 overlaid" or equivalent.Q: Where to stamp?A: Rings inside band, necklaces on clasp, earrings on post back. Must be legible without ruining aesthetics.All our silver jewelry meets international hallmarking standards. Contact us for details.