Easy-to-clean matte acid resistant ground coat

A composition for use in forming an enamel ground coat on steel substrates comprising a glass component comprising a blend of:

• from about 40% to about 70% by weight of a first glass portion comprising one or more alkali aluminophosphate frits comprising by weight from about 30% to about 50% P2O5, from about 20% to about 25% Al2O3, from about 10% to about 25% Na2O, up to about 10% K2O, up to about 10% SiO2, up to about 5% B2O3, from about 1% to about 3% NiO, from about 1% to about 2% MnO2, from about 1% to about 3% Co2O3, up to about 3% Li2O, from about 0.5% to about 1.5% Fe2O3, from about 1% to about 2% CuO, up to about 1% Sb2O3, and up to about 0.5% MoO3, and up to about 4% ZnO;
• up to about 30% by weight of a second glass portion comprising one or more zirconia-phosphate frits comprising by weight from about 25% to about 35% ZrO2, from about 20% to about 30% P2O5, from about 10% to about 20% SiO2, from about 10% to about 25% Na2O, from about 5% to about 10% K2O, up to about 8% TiO2, up to about 7% BaO, from about 0.05% to about 3% Co2O3, and up to about 3% NiO;
• and
• up to about 30% by weight of a third glass portion comprising one or more alkali borosilicate frits comprising by weight from about 40% to about 60% SiO2, from about 10% to about 25% Na2O, from about 10% to about 15% B2O3, up to about 5% CaO, up to about 3% Li2O, up to about 5% TiO2, from about 1% to about 5% ZrO2, from about 1% to about 3% NiO, from about 1% to about 3% Co2O3, from about 1% to about 2% CuO, and up to about 1% Al2O3.