Post-consumer glass — bottles, windshields, factory offcuts — returned to furnace-ready cullet. Color-sorted. Purity-certified. Delivered by the ton.
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Raw Intake
Every load arrives at the tipping floor as chaos — mixed colors, sizes, contamination levels unknown. Trucks from municipal transfer stations, brewery returns, automotive glass from body shops.
We weigh, log, and assign a stream classification before a single pane touches the sorting belt. Contamination above threshold is quarantined and returned. Clean loads move forward within the hour.
Washing & Crushing
Glass enters a closed-loop wash system that removes labels, adhesives, and organic residue. Water is recirculated and filtered — nothing leaves the building as effluent.
After washing, a three-stage crusher reduces cullet to the precise gradation your furnace requires: coarse (25–50 mm), medium (10–25 mm), or fine (< 10 mm). Gradation is verified by sieve analysis on every batch.
Optical Sorting
Four optical sorters — each running at 3 tonnes per hour — read every fragment by color and chemical signature. Flint, emerald, amber, and mixed cullet emerge from separate chutes, each stream achieving ≥ 99.2% color purity.
Ceramic, stone, and metal contaminants are rejected by eddy-current and near-infrared sensors. What reaches your furnace is glass, and only glass.
Four grades.
One standard.
Every shipment ships with a certificate of analysis. Purity, gradation, moisture, and metals — documented before it leaves the yard.
| Grade | Purity | Gradation | Moisture | Metals | Applications |
|---|---|---|---|---|---|
Flint (Clear) | ≥ 99.5% | 10–25 mm | < 0.5% | ND | Container glass, fiberglass |
Emerald (Green) | ≥ 99.2% | 10–25 mm | < 0.5% | ND | Wine bottles, pharmaceutical |
Amber (Brown) | ≥ 99.0% | 10–50 mm | < 0.8% | ND | Beer bottles, spirits |
Mixed Cullet | ≥ 97.5% | < 50 mm | < 1.2% | ND | Aggregate, foam glass insulation |
Ready to specify your grade and monthly tonnage?
Get Your Cullet QuoteNumbers that matter to procurement.
We switched our flint feedstock to Cullet eighteen months ago. Our furnace efficiency improved 4% on the first melt, and we've had zero contamination rejects since. The certificate of analysis on every load is the detail that made our QA team comfortable from day one.
The material is ready.
Is your furnace?
Select your cullet color, grade, and monthly tonnage. Receive a binding quote within one business day.