Cullet sorted by color has significantly higher value than mixed cullet, because glassworks need cullet of a specific color for their products. A glass optical color sorting machine automatically separates glass fragments by color, clear, green, brown, using high-precision cameras and optical sensors, turning low-value mixed cullet into premium, color-sorted cullet.
A glass optical color sorting machine is the choice of glass recyclers who want to maximize cullet value through color sorting. The optical technology detects the color of each fragment in real time and automatically directs it into the corresponding fraction, with a precision and speed impossible to achieve manually. See the full range of recycling equipment and the solutions for glass recycling.
Key Advantages for Sorting Glass Fragments by Color
• Optical color sorting, a glass optical color sorting machine separates fragments by color (clear, green, brown) with cameras and sensors.
• Premium sorted cullet, color-sorted cullet has much higher value than mixed cullet.
• High precision, the optical detection of each fragment's color is precise and consistent.
• High speed, processes large volumes of fragments with real-time sorting.
• Automatic separation, each fragment is automatically directed into the corresponding color fraction.
• Removal of colored impurities, also separates ceramics, stones and optically detectable impurities.
• Automatic control, coordinated optical and pneumatic system for precise sorting.
• Scalable, capacity is sized to the volume of fragments processed.
Technical Specifications, Glass Optical Color Sorting Machine
| Parameter | Value |
|---|---|
| Feedstock | Glass fragments mixed by color |
| Principle | Optical sorting with cameras and sensors |
| Colors separated | Clear, green, brown (and other shades) |
| Detection | High-resolution optical cameras, color sensors |
| Ejection | Pneumatic system (air nozzles) for directing |
| Impurities removed | Ceramics, stones, porcelain, detectable impurities |
| Final product | Premium, color-sorted cullet |
| Control | Automatic optical and pneumatic system |
| Components | CE marked where applicable |
Applications for Optical Separation of Clear, Green, Brown Glass
A glass optical color sorting machine serves glass recyclers who want maximum-value cullet, fragment processing centers and operators who supply glassworks with strict color requirements. Glassworks produce glass of a specific color (clear for premium packaging, green and brown for beverage bottles), and color-sorted cullet is essential for these products.
Sorting glass by color is a key component of quality recycling, encouraged at European level; a glass optical color sorting machine delivered in Europe is designed in line with the requirements of Directive 2008/98/EC on waste. For integration into a complete glass recycling flow, see also the complete industry solutions.
The optical technology of a glass optical color sorting machine works through color detection: high-resolution cameras scan each fragment passing on the conveyor belt, and the system determines the color in real time. Based on the detected color, a pneumatic system of air nozzles ejects the fragment into the corresponding fraction. This real-time processing allows the sorting of large volumes with high precision.
The added value of color-sorted cullet, produced by a glass optical color sorting machine, is substantial: pure clear cullet has the highest value (for premium packaging and clear glass), and sorted green and brown cullet has higher value than mixed cullet. Color sorting turns low-value mixed cullet into a premium product, segmented by color, sellable at higher prices.
The removal of colored impurities is an additional benefit of a glass optical color sorting machine: besides color sorting, the optical technology also detects and separates ceramics, stones, porcelain and other impurities that differ optically from glass. These impurities are particularly problematic in cullet (different melting point, defects in remelted glass), and their optical removal increases the quality of the cullet.
The precision and consistency of a glass optical color sorting machine far exceed manual sorting: an operator cannot sort fragments by color at the speed and volume of an optical machine, and human precision varies with fatigue. Automatic optical sorting offers consistent precision, high speed and uniform quality of the sorted cullet, regardless of volume or duration of operation.
Colors and Applications
| Cullet color | Typical applications |
|---|---|
| Clear (flint) | Premium packaging, clear glass, maximum value |
| Green | Wine bottles, beverages |
| Brown (amber) | Beer bottles, light-sensitive products |
| Mixed (residual) | Applications that accept mixed color |
How It Works
1. The mixed glass fragments are fed onto the conveyor belt.
2. The optical cameras scan each fragment, determining the color in real time.
3. The system determines the color and detects impurities (ceramics, stones).
4. The pneumatic air nozzles eject each fragment into the corresponding color fraction.
5. The detected impurities are ejected separately.
6. The color-sorted cullet is collected in separate fractions.
The optical and pneumatic system coordinates the sorting in real time. A properly calibrated glass optical color sorting machine produces premium-quality color-sorted cullet, with high precision and speed, maximizing cullet value through color segmentation.
Frequently Asked Questions
How does optical color sorting work?
High-resolution cameras scan each fragment on the conveyor belt, determining the color in real time. Based on the color, a pneumatic system of air nozzles ejects the fragment into the corresponding fraction. A glass optical color sorting machine processes large volumes with high precision, separating fragments by color and removing impurities.
Why is color-sorted cullet more valuable?
Glassworks produce glass of a specific color and need cullet of the corresponding color. Pure clear cullet has the highest value; sorted green and brown cullet is worth more than mixed cullet. A glass optical color sorting machine turns low-value mixed cullet into a premium product segmented by color.
Does it also separate impurities, not just colors?
Yes. Besides color sorting, a glass optical color sorting machine also detects and separates ceramics, stones, porcelain and other impurities that differ optically from glass. These impurities are problematic in cullet (defects on remelting), and their optical removal significantly increases the quality of the cullet produced.
Is the delivered equipment new?
Yes. We deliver new, unused equipment, built to order, not reconditioned units. The build uses components from established suppliers, CE marked where applicable, and every machine undergoes a full inspection before shipment. You receive the technical documentation and operating manuals in your language.
What makes URSTAG a premium brand?
European design, top-tier components and experience. Every machine is designed by our engineering teams in Europe and built from components by industry leaders such as Siemens, Schneider Electric, ABB, WEG, SEW-Eurodrive, NORD Drivesystems and Bonfiglioli. The result is reliable, energy-efficient and durable equipment, backed by over 15 years of experience and by delivery, installation, training and service included.
How long do installation and commissioning take?
Transport, commissioning and operator training are included and carried out by a local team, in your language. Before shipment, the machine undergoes a full inspection and calibration, so your unit becomes operational quickly, with no hidden installation costs.
What sorting capacity does it have?
The capacity of a glass optical color sorting machine is configured according to the project, from a few tons per hour to larger industrial capacities. The capacity depends on the belt width and the number of optical channels. The exact capacity is set according to the volume of fragments processed and the sorting requirements.
Why URSTAG?
URSTAG is a premium brand of recycling equipment, with over 15 years of experience. You don't just get a machine, you get a solution engineered by specialists, built from top-tier components and backed by a team that supports you from design through commissioning.
• European engineering, every machine and every complete line is designed by our engineering teams in Europe, with a focus on reliability, safety and energy efficiency.
• Premium components, we build on motors and automation from industry leaders: Siemens, Schneider Electric, ABB, WEG, SEW-Eurodrive, NORD Drivesystems and Bonfiglioli.
• Over 15 years of experience, we know how materials and machines behave in real-world operation, and we configure each solution for your flow and volume.
• New equipment, configured for you, we supply new units, made to order for your application, with complete technical documentation.
• Delivery, installation and training included, we handle transport, commissioning and operator training, with support throughout the equipment's life.
As a premium brand, URSTAG relies on European engineering, top-tier components and experience. You choose a partner that supports your production long term, with equipment built to run reliably in demanding industrial environments.
