Enamel paste compositions, enamel coated products, and methods of manufacturing the same

2:

• The enamel paste composition according to claim 1,
• wherein the first glass frit has a glass transition temperature of:
• at least 465° C., 470° C., 475° C., 480° C., or 485° C.;
• no more than 550° C., 530° C., 515° C., or 500° C.;
• or within a range defined by any combination of the aforementioned lower and upper limits.

3:

• The enamel paste composition according to claim 1,
• wherein the second glass frit has a glass transition temperature of:
• at least 410° C., 420° C., 430° C., or 440° C.;
• no more than 460° C., 455° C., or 450° C.;
• or within a range defined by any combination of the aforementioned lower and upper limits.

4:

• The enamel paste composition according to claim 1,
• wherein the first glass frit has a particle size meeting one or more of the following characteristics:
• a D90:
• of at least 6 μm, 7 μm, 8 μm, 8.5 μm, or 8.8 μm;
• no more than 20 μm, 15 μm, 13 μm, 12.5 μm, or 11.8 μm;
• or within a range defined by any combination of the aforementioned lower and upper limits;
• a D50:
• of at least 1.5 μm, 1.6 μm, 1.7 μm, 1.8 μm, or 1.9 μm;
• no more than 5 μm, 4 μm, 3.8 μm, or 3.6 μm;
• or within a range defined by any combination of the aforementioned lower and upper limits;
• a maximum particle size of no more than 40 μm, 35 μm, 30 μm, or 26 μm.

5:

• The enamel paste composition according to claim 1,
• wherein the second glass frit has a particle size meeting one or more of the following characteristics:
• a D90:
• of at least 0.5 μm, 0.8 μm, 1.0 μm, or 1.2 μm;
• no more than 4 μm, 3 μm, 2.2 μm, or 1.9 μm;
• or within a range defined by any combination of the aforementioned lower and upper limits;
• a D50:
• of at least 0.1 μm, 0.2 μm, 0.3 μm, 0.4 μm, or 0.5 μm;
• no more than 1.4 μm, 1.3 μm, 1.2 μm, or 1.0 μm;
• or within a range defined by any combination of the aforementioned lower and upper limits;
• a maximum particle size of no more than 10 μm, 9 μm, 8 μm, 7 μm, or 6 μm.

6:

• The enamel paste composition according to claim 1,
• wherein the first glass frit forms a volume fraction of the glass frit of:
• at least 0.45, 0.50, or 0.60;
• no more than 0.90, 0.87, 0.81, or 0.80;
• or within a range defined by any combination of the aforementioned lower and upper limits.

7:

• The enamel paste composition according to claim 1,
• wherein the second glass frit forms a volume fraction of the glass frit of:
• at least 0.1, 0.13, 0.19, or 0.2;
• no more than 0.55, 0.50, 0.45, or 0.40;
• or within a range defined by any combination of the aforementioned lower and upper limits.

8:

• The enamel paste composition according to claim 1,
• wherein the first glass frit forms a weight fraction of the glass frit of:
• at least 0.35, 0.45, or 0.60;
• no more than 0.90, 0.85, 0.80, or 0.75;
• or within a range defined by any combination of the aforementioned lower and upper limits.

9:

• The enamel paste composition according to claim 1,
• wherein the second glass frit forms a weight fraction of the glass frit of:
• at least 0.1, 0.15, or 0.25;
• no more than 0.55, 0.50, 0.45, or 0.40;
• or within a range defined by any combination of the aforementioned lower and upper limits.

10:

• The enamel paste composition according to claim 1,
• wherein a weight ratio of the first glass frit to second glass frit is:
• at least 0.8, 0.9, 1.0, 1.2, 1.5, or 2;
• no more than 5.0, 4.5, 4.0, 3.5, or 3;
• or within a range defined by any combination of the aforementioned lower and upper limits.

11:

• The enamel paste composition according to claim 1,
• wherein a volume ratio of the first glass frit to second glass frit is:
• at least 0.8, 1.0, 1.2, 1.5, or 2;
• no more than 6.7, 5.0, 4.4, or 4.0;
• or within a range defined by any combination of the aforementioned lower and upper limits.

20:

• A method of forming an enamel coating comprising:
• depositing the enamel paste composition according to any preceding claim on a substrate;
• and
• firing the enamel paste to form an enamel coating on the substrate, the enamel coating comprising a heterogeneous frit microstructure with particles of the first frit embedded in a matrix of second frit.