Glass composition including sulfides having low visible and IR transmission

A glass comprising:

• a base glass portion comprising:
• 19 Ingredient Wt. % SiO2 67-75% Na2O 10-20% CaO 5-15% MgO 0-8% Al2O3 0-5% K2O 0-5% BaO 0-2%
• and a colorant portion consisting essentially of:
• 20 total iron:
• 0.2 to 0.8% cobalt oxide:
• 0 to 1,500 ppm sulfides (S2−):
• 0.0001 to 1% selenium (Se):
• 0 to 0.0020% chromium oxide:
• 0 to 0.010% erbium oxide:
• 0 to 0.010% nickel oxide:
• 0 to 0.005%
• wherein the glass has a visible transmission (Lta) no greater than 25%, and an infrared (IR) transmission no greater than 25%.

A glass having a visible transmission no greater than 25% and in infrared (IR) transmission no greater than 25%, the glass including a colorant portion consisting essentially of:

• 24 total iron:
• 0.2 to 0.8% cobalt oxide:
• 0 to 1,500 ppm sulfides (S2−):
• 0.0001 to 1%.

Glass having a visible transmission no greater than 20%, an IR transmission no greater than 20%, and a % TS no greater than 20%, wherein the glass includes a colorant portion comprising:

• 26 total iron:
• 0.2 to 0.8% cobalt oxide:
• 0 to 1,500 ppm sulfides (S2−):
• 0.0001 to 1%.

A method of making privacy glass, the method comprising:

• causing a batch melt including soda, lime, silica, iron and Na2SO4 to have a negative batch redox value;
• and
• processing the batch so as to form a privacy glass having a visible transmission no greater than 25% and in infrared (IR) transmission no greater than 25%, wherein the privacy glass includes a colorant portion comprising:
• 28 total iron:
• 0.2 to 0.8% cobalt oxide:
• 0 to 1,500 ppm sulfides (S2−):
• 0.0001 to 1%.

Glass having an infrared (IR) transmission no greater than 20%, wherein the glass includes a colorant portion comprising:

• 29 total iron:
• 0.2 to 0.8% cobalt oxide:
• 0 to 1,500 ppm sulfides (S2−):
• 0.0001 to 0.10%.