Metallic inkjet compositions and processes for digitally printing metallic decorations on textile substrates
Provided herein is a water-based metallic ink composition specifically adapted for direct digital inkjet printing on non-while fabrics and textile, which affords high resolution, high gloss and high luster metallic effect (high flop index) in decorations and designs that are wash-fast and stretchable. Also provided are processes of using the metallic ink compositions with other colored ink composition in direct digital inkjet printing on textile.
1. A process of printing a metallic element in an image on a substrate, comprising:
applying on the substrate by a first printhead an aqueous immobilizing composition that comprises a property-adjusting agent,
digitally applying by a second printhead an aqueous metallic inkjet composition, said aqueous metallic inkjet composition comprises a property-sensitive proto-elastomeric film-forming agent, said property-adjusting agent causes said aqueous metallic inkjet composition to coagulate, and
digitally applying by a third printhead an aqueous transparent colored inkjet composition on top of said aqueous metallic inkjet composition,
wherein:
digitally applying said aqueous transparent colored inkjet composition is effected simultaneously with digitally applying said aqueous metallic inkjet composition;
said aqueous immobilizing composition is essentially devoid of a film-forming agent; and
said aqueous transparent colored inkjet composition comprises a pigment.
2. The process of claim 1 , wherein the substrate is stretchable and/or flexible substrate, said aqueous metallic inkjet composition further comprises at least one emulsified proto-elastomeric film-forming agent, such that said aqueous metallic inkjet composition forms a film upon curing that is characterized by a glass transition temperature (T g ) that ranges from −35° C. to 0° C., said at least one emulsified proto-elastomeric film-forming agent is said property-sensitive proto-elastomeric film-forming agent or a different ingredient.
3. The process of claim 1 , wherein the substrate is stretchable and/or flexible substrate, said aqueous transparent colored inkjet composition comprises at least one emulsified proto-elastomeric film-forming agent, such that said aqueous transparent colored inkjet composition forms a film upon curing that is characterized by a glass transition temperature (T g ) that ranges from −35° C. to 0° C.
4. The process of claim 1 , wherein the substrate is non-white, the process further comprising, prior to said digitally applying said aqueous metallic inkjet composition, digitally applying an aqueous opaque underbase inkjet composition on the substrate, and effecting said digitally applying said aqueous metallic inkjet composition over said aqueous opaque underbase inkjet composition.
5. The process of claim 4 , wherein the substrate is stretchable and/or flexible substrate, said aqueous opaque underbase inkjet composition comprises at least one emulsified proto-elastomeric film-forming agent, such that said aqueous opaque underbase inkjet composition forms a film upon curing that is characterized by a glass transition temperature (T g ) that ranges from −35° C. to 0° C.
6. The process of claim 4 , wherein said aqueous opaque underbase inkjet composition comprises at least one property-sensitive agent, such that said property-adjusting agent causes said aqueous opaque underbase inkjet composition to coagulate.