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INSTITUTE OF SCRAP RECYCLING INDUSTRIES, INC.
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Guidelines for Glass Scrap
Guidelines for Glass
Cullet: GC-2016
Container Glass Cullet
Specifications
Preamble
These standards and practices apply to container glass cul-
let for purchase or sale in the United States and Canada.
Transactions covering shipments to or from other countries
may also be in accordance with these standards and prac-
tices and may be modified by mutual agreement between
buyer and seller. These specifications are guidelines for buy-
ing and selling container glass cullet and always subject to
the buyer and seller’s agreement.
Scrap Glass Definitions
Container Glass Cullet:
crushed or whole scrap soda-lime-
silica container glass.
Unprocessed Container Glass Cullet:
broken or whole scrap
glass containers that comply with the proper ISRI glass specifi-
cations.
Processed (Furnace Ready) Container Glass Cullet:
crushed and whole contaminate-free scrap container glass
that complies with the proper ISRI glass specifications.
Organic Matter:
consists of organic materials that are non-
container glass items; for example, paper labels should not
exceed 0.2%.
Ferrous Materials:
are magnetic metals, i.e. steel, iron, etc.,
and therefore must be removed during scrap glass process-
ing.
Non-ferrous Materials:
are non-magnetic metals, i.e. alu-
minum, lead, copper, etc., and therefore must be removed
during glass processing.
The Purchase Agreement
Each transaction covering the purchase or sale of container
glass cullet should be confirmed in writing and include
agreement on the following items:
1. Product
Where possible, each container glass cullet grade shall be
specified in accordance with the grade as defined.
2. Quantity
Where possible, the quantity shall always be specified in
terms of a definite number of tons of 2,000 pounds each.
A. If the quantity is specified in tons, the order shall be con-
sidered completed when aggregate shipments are 5% under
or over the quantity ordered.
B. If the quantity is specified in carloads or truckloads, a
“load” shall be defined as a truck, trailer, or railroad car
loaded to full visible capacity not to exceed established legal
weight limits.
3. Packaging
It should be stated whether shipped units are to be in boxes,
or in bulk by railroad car, truck, or trailer. Where possible,
approximate weights should be specified.
4. Price Units
The price agreed upon shall be clearly stated in US dollars
and cents per 2,000 pounds or in US dollars and cents per
hundred weight.
5. Terms
Terms shall be “net cash 30 days after date of shipment”
unless otherwise agreed upon.
Arbitration
In the event of a total disagreement between buyer and
seller, the dispute should be submitted to ISRI arbitration.
In all cases, the cost of arbitration shall be borne by the par-
ty found to be at fault, or split in the event of compromise,
as determined by the arbitrators.
UNPROCESSED FLINT CONTAINER GLASS CULLET
SPECIFICATIONS
Composition:
Soda-lime-silica beverage or food container
glass.
Cullet Colors Segregation: Flint Cullet
Flint
95-100%
Amber
0-5%
Green
0-5%
Other Colors
0-5%
Size:
Cullet may be broken but not pulverized.
Moisture:
Cullet should be free of excess moisture.
Contaminant Listings:
Outthrow Materials:
Normal container labels; ring and metal
closures where processing capabilities permit.
Prohibitive Materials:
Non-acceptable items include non-
container glass (vision ware, light bulbs, crystal, windows,
mirrors, drinking glasses, ceramic, milk glass, etc.) metals,
ores, minerals, bricks, clay, grinding and refractory materi-
als, rocks, clay and ceramic closures.
General:
The quality of the unprocessed flint container glass
cullet must be such that after beneficiation with a conven-
tional container glass cullet processor it will be suitable for
the production of glass containers.
UNPROCESSED AMBER CONTAINER GLASS CULLET
SPECIFICATIONS
Composition:
Soda-lime-silica beverage or food container
glass.
Cullet Colors Segregation: Amber Cullet
Amber
90-100%
Flint
0-5%
Green
0-5%
Other Colors
0-5%
Size:
Cullet may be broken but not pulverized.
Moisture:
Cullet should be free of excess moisture.
Contaminant Listings: