Fluid set for ink-jet printers

A method for inkjet printing comprising the steps of:

• I) printing a layer of an ink comprising a colorant having a structure selected from the group consisting of Formula I, Formula II, Formula III, Formula IV, and mixtures thereof onto a medium substrate wherein:
• wherein
• D is a chromophore;
• R1 is H or C1-C5;
• R2 is a carbohydrate as defined by substructure A;
• R3 is C1-C5;
• R4 is a carbohydrate as defined by substructure B;
• R5 is defined by substructure C;
• R6 is selected from the group consisting of —OH, —R7CO2H wherein R7 is an aromatic or aliphatic moiety, substituted with a CO2H group, —R8SO3H wherein R8 is an aromatic or aliphatic moiety substituted with an —SO3H group, NR1R8 wherein R8 is an aromatic moiety, —C≡N, Cl, D wherein D is a chromophore as defined above;
• and NR2R5 (amino carbohydrate) wherein R2 and R5 are as defined above;
• wherein
• m is 1-5;
• n is 2-7;
• w is 0-4;
• x is 2-7;
• y is 0-1;
• z is 0-3;
• and
• II) overprinting onto said ink layer a layer of 5th pen fluid comprising a reactive agent which reacts with said colorant upon contact.

A method for inkjet printing comprising the steps of:

• I) underprinting a layer of 5th pen fluid comprising a reactive agent onto a substrate;
• and
• II) printing a layer of an ink comprising a colorant having a structure selected from the group consisting of Formula I, Formula II, Formula III, Formula IV, and mixtures thereof onto said layer of 5th pen fluid;
• wherein said ink and said 5th pen fluid come into contact and wherein said 5th pen fluid comprises a reactive agent which precipitates said colorant, wherein:
• wherein
• D is a chromophore;
• R1 is H or C1-C5;
• R2 is a carbohydrate as defined by substructure A;
• R3 C1-C5;
• R4 is a carbohydrate as defined by substructure B;
• R5 is defined by substructure C;
• R6 is selected from the group consisting of —OH, —R7CO2H wherein R7 is an aromatic or aliphatic moiety substituted with a CO2H group, —R8SO3H wherein R8 is an aromatic or aliphatic moiety substituted an —SO3H group NR1R8 wherein R8 is an aromatic moiety, —C≡N, —Cl, D wherein D is a chromophore as defined above;
• and NR2R5 (amino carbohydrate) wherein R2 and R5 are defined above;
• wherein
• m is 1-5;
• n is 2-7;
• w is 0-4;
• x is 2-7;
• y is 0-1;
• z is 0-3.

A method for inkjet printing comprising the steps of:

• I) underprinting a layer of 5th pen fluid comprising a reactive agent onto a substrate;
• and
• II) printing a layer of an ink comprising a colorant having a structure selected from the group consisting of Formula I, Formula II, Formula III, Formula IV, and mixtures thereof onto said layer of 5th pen fluid, wherein:
• wherein
• D is a chromophore;
• R1 is H or C1-C5;
• R2 is a carbohydrate as defined by substructure A;
• R3 is C1-C5;
• R4 is a carbohydrate as defined by substructure B;
• R5 is defined by substructure C;
• R6 is selected from the group consisting of —OH, —R7CO2H wherein R7 is an aromatic or aliphatic moiety substituted with a CO2H group, —R8SO3H wherein R8 is an aromatic or aliphatic moiety substituted with an —SO3H group, NR1R8 wherein R8 is an aromatic moiety, —C≡N, —Cl, D wherein D is a chromophore as defined above;
• and NR2R5 (amino carbohydrate) wherein R2 and R5 are as defined above;
• wherein
• m is 1-5;
• n is 2-7;
• w is 0-4;
• x is 2-7;
• y is 0-1;
• z is 0-3;
• and
• III) overprinting onto said layer of ink a second layer of said 5th pen fluid from step I;
• wherein said ink and said 5th pen fluid come into contact and wherein said 5th pen fluid comprises a reactive agent which precipitates said colorant.