Engineered to ISO tasting dimensions, this completely opaque black crystal wine glass blocks visual cues such as hue, intensity, and viscosity, forcing evaluators to assess samples based strictly on aroma and taste. The tapered bowl concentrates volatile aromatic compounds into the headspace, while a cold-cut laser rim ensures smooth liquid flow to the mid-palate. Manufactured through high-temperature thermal annealing, the glass withstands harsh commercial dishwashing cycles without surface oxidation or structural degradation.
Technical Specifications
|
Parameter |
Technical Standard |
Compliance / Metric |
|
Material |
High-Clarity Lead-Free Crystal Glass |
Refractive Index 1.52 |
|
Opacity Grade |
0% Visible Light Transmittance (VLT) |
100% Light-Blocking under 1000-lux |
|
Capacity Options |
ISO Standard 215 ml (7.3 oz) / 350 ml (11.8 oz) |
Volumetric Tolerance ±0.5 ml |
|
Dimensions |
Height: 155 mm ± 1.5 mm | Bowl Rim: 65 mm |
Wall Thickness: 0.9 mm – 1.1 mm |
|
Manufacturing |
Single-Piece Drawn Stem Technology |
Torsional Strength +35% vs. Welded |
|
Rim Finish |
Laser-Cut & Cold-Fired |
Non-Beaded Sharp Transition |
|
Dishwasher Resistance |
EN 12875 Industrial Wash Test |
500+ Commercial Cycles at 85°C |
|
Safety Certifications |
FDA 21 CFR 175.300 / LFGB Section 30 & 31 |
Zero Lead, Cadmium, or Heavy Metals |
Functional Features
Absolute Light Obscuration
Dark pigmentation fused directly into the glass matrix or thermally bonded via electrostatic curing prevents color identification even under intense tasting room lighting.
ISO-Calibrated Aroma Concentration
A wide evaporative base narrowing sharply toward the aperture maximizes headspace vapor concentration while holding delicate aromatic esters inside the bowl.
Precision-Finished Laser Rim
Cold-cut rims without rolled edges direct liquid across the tongue evenly, avoiding flow turbulence and preventing localized acid perception.
Seamless Drawn-Stem Integrity
Continuous pulled-stem construction removes stress points common in fused joints, significantly reducing breakage during industrial polishing and racking.
Target Applications
Sommelier Certification & Competitions
Standard hardware for CMS and WSET sensory evaluations where brand, vintage, and grape color bias must be excluded.
Winery R&D & Technical Blending
Tool for winemakers evaluating barrel aging, varietal selection, and oak integration without visual preconceptions.
Educational Sensory Academies
Training apparatus for wine schools focusing on acid balance, tannin structure, and aromatic profile identification.
Sensory & Mechanical Performance
Aroma Headspace Retention: Retains 88% trapped aromatic concentration after 3 minutes of glass agitation.
Thermal Equilibrium: Low thermal expansion coefficient limits pour temperature shift to within 0.5°C over 15 minutes.
Flow Trajectory Angle: 18-degree inner bowl wall gradient directs liquid straight to the mid-palate.
Manufacturing Advantages
Controlled Volumetric Tolerances
Automated gob-forming machinery keeps weight variance under 3g per unit and overall height tolerances within ±1.5 mm across production runs.
High-Temperature Finish Curing
Annealed at 600°C to fuse surface treatments into the silica structure, preventing peeling, clouding, or chemical oxidation from alkaline detergents.
Inert Material Composition
Zero chemical leaching or odor retention ensures wine taste profiles remain uncompromised during prolonged tasting sessions.
OEM & Customization Capabilities
Pigmentation & Finish Options
Solid-Melt Black Glass (Permanent pigment melted into raw glass batch)
Matte Electrostatic Exterior Coating (Soft-touch tactile finish)
Gloss Thermal Lacquer Curing
Precision Branding & Calibration
Laser-Etched Fill Lines (50 ml, 75 ml, 100 ml at ±0.5 ml accuracy)
Under-Base Screen-Printed Logos (White/metallic inks fired at 580°C)
Laser Engraved Foot Rims
Dimensional Variations
Custom volume molds available from 180 ml to 450 ml
Customized stem lengths tailored to specific commercial dish racks
Selection Guide
Material Type Selection
Specify solid-melt black glass for high-frequency industrial washing environments. Choose electrostatic matte exterior sprays for high-end retail packaging and promotional gifts.
Capacity Identification
Select 215 ml ISO specification for official examination standards. Choose 350 ml shapes for general red and white varietal evaluation.
Rim Edge Finish
Cold-cut laser rims suit professional tasting panels. Fire-polished rims provide additional impact strength for event equipment rentals.
Quality Control
Light Leakage Verification: 100% photometer inspection using a 5000-lumen LED light source to confirm VLT 0%.
Polariscope Stress Analysis: Optical stress verification ensures residual internal stress remains below 5 MPa to eliminate spontaneous thermal cracking.
Impact & Drop Testing: Pendulum shock test applied at 0.4 Joules along the stem-to-bowl junction to confirm structural stability.
Packaging & Export Specifications
Drop-Test Approved Outer Cartons: 5-ply corrugated outer boxes with inner 3-ply cellular dividers pass ISTA 1A drop testing from 80 cm.
Master Pack Configurations:
6 pieces per inner box / 48 pieces per master carton
24-piece commercial compartment crates with anti-dust protective covers
Palletization Specifications: Euro-pallets (1200 x 800 mm) or US pallets (1200 x 1000 mm) wrapped in 23-micron stretch film with reinforced corner protectors.
Frequently Asked Questions
