Inkjet ink
An inkjet ink for a glass substrate can enable formation of an aesthetic image with high concealability on the surface of the glass substrate. The inkjet ink disclosed here can include: an inorganic solid including an inorganic pigment that develops a color except for black and a glass frit; a monomer component having a photocuring property; and a photoinitiator. In the inkjet ink, a volume ratio of the inorganic solid in a case where an ink total volume is 100 volume % can be 35 volume % or less, a volume ratio of the inorganic pigment in the case where a total volume of the inorganic solid is 100 volume % can be 15 volume % or more and less than 90 volume %, and a volume ratio of the inorganic pigment to the photoinitiator can be 11 times or less.
1. An inkjet ink for a glass substrate, the inkjet ink configured for use in drawing an image on a transparent glass substrate, the inkjet ink comprising:
an inorganic solid including an inorganic pigment and a glass frit, the inorganic pigment configured for use in developing any color except for black;
a monomer component having a photocuring property; and
a photoinitiator,
wherein:
a volume ratio of the inorganic solid in a case where a total volume of the inkjet ink is 100 volume % is 35 volume % or less,
a volume ratio of the inorganic pigment in the case where the total volume of the inorganic solid is 100 volume % is 15 volume % or more and less than 90 volume %, and
a volume ratio of the inorganic pigment to the photoinitiator is 11 times or less; and
wherein the monomer component includes at least:
a monofunctional acrylate monomer including one acryloyl group or one methacryloyl group in a molecule;
a monofunctional N-vinyl compound monomer in which one vinyl group is bound to a nitrogen (N) atom of a nitrogen-containing compound; and
a polyfunctional vinyl ether monomer including at least two vinyl ether groups in a molecule.
2. The inkjet ink according to claim 1 , wherein the inorganic pigment is an inorganic pigment that develops a color of cyan, magenta, or yellow.
3. The inkjet ink according to claim 1 , wherein the volume ratio of the inorganic solid in the case where the total volume of the inkjet ink is 100 volume % is 15 volume % or more and 30 volume % or less.
4. The inkjet ink according to claim 1 , wherein the volume ratio of the inorganic pigment in the case where the total volume of the inorganic solid is 100 volume % is 25 volume % or more and 85 volume % or less.
5. The inkjet ink according to claim 1 , wherein the volume ratio of the inorganic pigment to the photoinitiator is 10.7 times or less.
6. The inkjet ink according to claim 1 , wherein a volume ratio of the monomer component in the case where the total volume of the inkjet ink is 100 volume % is 50 volume % or more and 75 volume % or less.
7. A method for producing a glass product having a decoration part, the method comprising the steps of:
performing inkjet printing on a surface of a glass substrate with the inkjet ink as recited in claim 1 ;
applying ultraviolet rays to the surface of the glass substrate and curing the inkjet ink adhering to the surface of the glass substrate; and
calcining the glass substrate at a maximum calcination temperature of 450° C. to 1200° C.
8. A method for producing transfer paper for a glass substrate, the transfer paper being for use in the glass substrate to be subjected to calcination, the method comprising the steps of:
performing inkjet printing on a surface of a mount with the inkjet ink as recited in claim 1 ; and
applying ultraviolet rays to the surface of the mount and curing the inkjet ink adhering to the surface of the mount.