Ceramic glaze having antimicrobial property

An antimicrobial ceramic glazing composition, comprising:

• a ceramic glaze base adapted to be fired at a firing temperature of from at least about 1062° C.;
• and
• a synergistic antimicrobial composition including a first antimicrobial agent and a second antimicrobial agent, the antimicrobial composition being one of:
• 2% Ag2CO3+2% Bi2O3,
• 2% Ag2CO3+2% CuO,
• 2% Ag2CO3+2% SnO2,
• 2% Ag2CO3+2% ZnO,
• 2% Ag2CO3+4% ZnO,
• 2% Bi2O3+2% CuO,
• 2% Bi2O3+4% CuO,
• 2% CuO+4% Ag2CO3,
• 2% CuO+4% SnO2,
• 2% CuO+2% TiO2,
• 2% CuO+4% TiO2,
• 2% CuO+4% ZnO,
• 2% SnO2+4% Ag2CO3,
• 2% SnO2+4% CuO,
• 2% TiO2+4% Ag2CO3,
• 2% TiO2+4% CuO,
• 2% ZnO+4% Ag2CO3, or
• 2% ZnO+4% CuO;
• wherein percentages are based on weight, and
• wherein the glazing composition is adapted to possess an antimicrobial property after a conventional firing process at the firing temperature.