Dental porcelain compositions

A porcelain composition comprising:

• particulate comprising one or more particulate components selected from the group consisting of glass powder and glass-ceramic powder and mixtures thereof;
• wherein particulate has a d50 of from about 3.5 to about 5.5 microns;
• a d90 of from about 10 to about 14.5 microns;
• and
• wherein about 1.0 to about 4.0%/o by volume of the particulate has a particle size greater than or equal to about 20 microns.

A porcelain paste composition comprising:

• particulate comprising one or more particulate components selected from the group of glass powder and glass-ceramic powder and mixtures thereof;
• and
• a liquid vehicle;
• wherein the particulate has a d50 of from about 3 to about 6 microns;
• a d90 of from about 8 to about 16 microns;
• and
• wherein about 1.0 to about 4.0% by volume of the particulate has a particle size greater than or equal to about 20 microns.

A method of making a porcelain composition comprising:

• mixing two or more frits selected from the group of glass and glass-ceramic frits to form a particulate mixture;
• milling the particulate mixture to particle sizes having a d10 of from about 1.1 and about 1.8 microns;
• a d50 of from about 3 to about 6 microns;
• and a d90 of from about 8 to about 16 microns;
• and
• wherein about 1.0 to about 4.0% by volume of the particulate has a particle size greater than or equal to about 20 microns.

A method of making a porcelain composition comprising:

• selecting a frit from the group of glass and glass-ceramic frits;
• milling the frit to particle sizes to form a particulate mixture wherein the particulate mixture has a d10 of from about 1.1 to about 1.8 microns;
• a d50 of from about 3 to about 6 microns;
• and a d90 of from about 8 to about 16 microns;
• and
• wherein about 1.0 to about 4.0% by volume of the particulate has a particle size greater than or equal to about 20 microns.

A method of making a porcelain composition comprising:

• milling separately two or more frits, selected from the group of glass and glass-ceramic frits, to a particulate wherein the particulate has a d50 of from about 3 to about 6 microns;
• a d90 of from about 8 to about 16 microns;
• and
• wherein about 1.0 to about 4.0% by volume of the particulate has a particle size greater than or equal to about 20 microns;
• and
• mixing the two or more milled frits together to form a particulate mixture.

A method of making a porcelain composition comprising:

• milling separately two or more flits, selected from the group of glass and glass-ceramic frits;
• mixing the frits to form a particulate powder mixture;
• adding an opacifying agent to the particulate powder mixture to form a particulate powder-opacifying mixture;
• and
• milling the particulate powder-opacilying mixture to particle sizes wherein the particulate powder-opacifying mixture has a d50 of from about 3 to about 6 microns;
• a d90 of from about 8 to about 16 microns;
• and
• wherein about 1.0 to about 4.0% by volume of the particulate has a particle size greater than or equal to about 20 microns.

A method of making a porcelain composition comprising:

• milling separately two or more frits, selected from the group of glass and glass-ceramic frits;
• mixing the two or more flits to obtain a particulate mixture;
• wherein the particulate mixture comprises a particulate having a d50 of from about 3 to about 6 microns;
• a d90 of from about 8 to about 16 microns;
• and
• wherein about 1.0 to about 4.0% by volume of the particulate has a particle size greater than or equal to about 20 microns.