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A soda-lime-silica glass container and related methods of manufacturing. A black-strikable glass composition having a base glass portion and a latent colorant portion is prepared. The base glass portion includes soda-lime-silica glass materials and one or more blue colorant materials, and the latent

A soda-lime-silica glass container and related methods of manufacturing. A black-strikable glass composition having a base glass portion and a latent colorant portion is prepared. The base glass portion includes soda-lime-silica glass materials and one or more blue colorant materials, and the latent colorant portion includes cuprous oxide (Cu2O), stannous oxide (SnO), bismuth oxide (Bi2O3), and carbon (C). Glass containers may be formed from the black-strikable glass composition, and these glass containers may be heated to a temperature greater than 600 degrees Celsius to strike black therein. The glass containers formed from the black-strikable glass composition may be inspected—before or after striking—by infrared inspection equipment.

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1. A method of making glass containers including the steps of: preparing a black-strikable glass composition formulated to produce blue glass, which upon heat treatment and striking, develops a visually black color, the black-strikable glass composition having a base glass portion and a latent color

1. A method of making glass containers including the steps of: preparing a black-strikable glass composition formulated to produce blue glass, which upon heat treatment and striking, develops a visually black color, the black-strikable glass composition having a base glass portion and a latent colorant portion, the base glass portion including 60-75 wt. % SiO2, 7-15 wt. % Na2O, 6-12 wt. % CaO, 0.1-3.0 wt. % Al2O3, 0.0-2.0 wt. % MgO, 0.0-2.0 wt. % K2O, 0.01-0.25 wt. % SO3, 0.01-0.25 wt. % Fe2O3, and 0.01-0.15 wt. % CoO and the latent colorant portion including 0.0875-0.35 wt. % cuprous oxide (Cu2O), 0.06-0.5 wt. % stannous oxide (SnO), 0.006-0.05 wt. % bismuth oxide (Bi2O3), and 0.02-0.10 wt. % carbon (C); andforming a plurality of glass containers from the black-strikable glass composition,wherein the plurality of glass containers can be struck black to produce a plurality of black glass containers that transmit 30% to 65% infrared light so as to be inspectable using an infrared light source. 2. The method set forth in claim 1 including the additional step of: raising the temperature of the plurality of glass containers above 600 degrees Celsius to strike black coloration into the glass containers to produce a plurality of black glass containers. 3. The method set forth in claim 2 wherein the temperature of the plurality of glass containers is raised above 600 degrees Celsius for 10 to 90 minutes to produce the plurality of black glass containers. 4. A black glass container produced by the method set forth in claim 2. 5. The method as set forth in claim 2 wherein the plurality of black glass containers have a transmittance of less than 10% to light having wavelengths between 390 nm and 675 nm and a transmittance of greater than 30% to light having wavelengths between 750 nm and 850 nm. 6. The method as set forth in claim 5 wherein the plurality of black glass containers have a transmittance of at least 40% to light having a wavelength of 750 nm. 7. The method set forth in claim 1 including the additional step of: raising the temperature of the plurality of glass containers to a temperature between 630 degrees Celsius and 650 degrees Celsius to strike black coloration into the glass containers to produce a plurality of black glass containers. 8. The method set forth in claim 7 wherein the temperature of the plurality of glass containers is raised to a temperature between 630 degrees Celsius and 650 degrees Celsius for 30 to 40 minutes to produce the plurality of black glass containers. 9. The method as set forth in claim 1 wherein the amount of sulfur trioxide (SO3) retained in the plurality of glass containers is in the range of 0.01-0.22 wt. %. 10. The method as set forth in claim 1 wherein the temperature of the plurality of glass containers is not raised above 600 degrees Celsius after formation and the color of the glass containers is blue. 11. The method set forth in claim 1 including the additional steps of: raising the temperature of a first portion of the plurality of glass containers above 600 degrees Celsius to strike black coloration into the first portion of the glass containers to produce a plurality of black glass containers; andmaintaining a remaining portion of the plurality of glass containers at a temperature below 600 degrees Celsius after forming such that the remaining portion of the glass containers are blue. 12. A plurality of black glass containers produced by the method set forth in claim 11. 13. The method set forth in claim 1 wherein the latent colorant portion of the black-strikable glass composition enables the striking of copper (Cu) in the plurality of glass containers when the temperature of the plurality of glass containers is raised above 600 degrees Celsius. 14. A method of making glass containers including the steps of: preparing a black-strikable glass composition formulated to produce blue glass, which upon heat treatment and striking, develops a visually black color;forming a plurality of glass containers from the black-strikable glass composition;raising the temperature of a first portion of the plurality of glass containers above 600 degrees Celsius to strike black coloration into the first portion of the glass containers to produce a plurality of black glass containers; andmaintaining a remaining portion of the plurality of glass containers at a temperature below 600 degrees Celsius after forming such that the remaining portion of the glass containers are blue,wherein the plurality of black glass containers transmit 30% to 65% infrared light so as to be inspectable using an infrared light source. 15. The method as set forth in claim 14 wherein the black-strikable glass composition comprises 0.01-0.15 wt. % cobalt oxide (CoO), 0.0875-0.35 wt. % cuprous oxide (Cu2O), 0.06-0.5 wt. % stannous oxide (SnO), 0.006-0.05 wt. % bismuth oxide (Bi2O3), and 0.02-0.10 wt. % carbon (C). 16. The method as set forth in claim 14 wherein the plurality of glass containers include a retained amount of sulfur trioxide (SO3) in the range of 0.01-0.22 wt. %. 17. The method as set forth in claim 14 wherein the plurality of black glass containers have a transmittance of less than 10% to light having wavelengths between 390 nm and 675 nm and a transmittance of greater than 30% to light having wavelengths between 750 nm and 850 nm. 18. The method as set forth in claim 14 wherein the black-strikable glass composition comprises 60-75 wt. % SiO2, 7-15 wt. % Na2O, 6-12 wt. % CaO, 0.1-3.0 wt. % Al2O3, 0.0-2.0 wt. % MgO, 0.0-2.0 wt. % K2O, 0.01-0.25 wt. % SO3, and 0.01-0.25 wt. % Fe2O3.