Water-based paint, ceramics, and method of decoration

Ceramics comprising:

• a green body a surface of which is formed of silicic acid or silicate compound as a main component;
• and
• a water-based paint layer coating on the green body and formed of a water-based paint
• wherein the water-based paint comprises:
• a coloring base material;
• first cellulose nanofibers having a lignin content of 20 to 40 mass % and a water retention of 150 to 300%;
• and
• second cellulose nanofibers having a higher viscosity compared to the first cellulose nanofibers,
• wherein the water-based paint having a B-type viscosity of 600 cps or higher.

Glassware comprising:

• a glassware green body, and
• a glaze layer coating the glassware green body,
• wherein the glaze layer including a fired water-based paint layer applied to the glassware green body and coated with glaze, the fired water-based paint layer being formed of a water-based paint
• wherein the water-based paint comprises:
• a coloring base material;
• first cellulose nanofibers having a lignin content of 20 to 40 mass % and a water retention of 150 to 300%;
• and
• second cellulose nanofibers having a higher viscosity compared to the first cellulose nanofibers,
• wherein the water-based paint having a B-type viscosity of 600 cps or higher.

A ceramic ware comprising:

• a glazed ceramic ware green body, and
• a glaze layer coating the ceramic ware green body,
• wherein the glaze layer including a fired water-based paint layer applied to the glazed ceramic ware green body and coated with glaze, the fired water-based paint layer being formed of a water-based paint
• wherein the water-based paint comprises:
• a coloring base material;
• first cellulose nanofibers having a lignin content of 20 to 40 mass % and a water retention of 150 to 300%;
• and
• second cellulose nanofibers having a higher viscosity compared to the first cellulose nanofibers,
• wherein the water-based paint having a B-type viscosity of 600 cps or higher.

An enamelware comprising:

• a glazed enamelware green body, and
• a glaze layer coating the enamelware green body,
• wherein the glaze layer including a fired water-based paint layer applied to the glazed enamelware green body and coated with glaze, the fired water-based paint layer being formed of a water-based paint
• wherein the water-based paint comprises:
• a coloring base material;
• first cellulose nanofibers having a lignin content of 20 to 40 mass % and a water retention of 150 to 300%;
• and
• second cellulose nanofibers having a higher viscosity compared to the first cellulose nanofibers,
• wherein the water-based paint having a B-type viscosity of 600 cps or higher.

A method of decoration comprising:

• painting with a water-based paint, wherein the water-based paint comprises:
• a coloring base material;
• first cellulose nanofibers having a lignin content of 20 to 40 mass % and a water retention of 150 to 300%;
• and
• second cellulose nanofibers having a higher viscosity compared to the first cellulose nanofibers,
• wherein the water-based paint having a B-type viscosity of 600 cps or higher,
• on a green body of which surface is formed of silicic acid or a silicate compound as a main component, followed by drying, to obtain a first painted body, and
• applying a glaze to the first painted body, followed by firing, to obtain a first glazed body.