Efficient ink erasure system
View Patent ↗A system comprises a writing instrument. The writing instrument comprises an ink, wherein the ink comprises a coloring agent and a bonding agent. The adhesiveness of the bonding agent can be altered by applying a voltage or a voltage and a current. Further, the system comprises a writing surface comprising a first electrode and a second electrode or a writing surface comprising a first electrode and an erasing tool comprising a second electrode.
1. A system comprising:
a writing instrument comprising an ink,
wherein the ink comprises a coloring agent and a bonding agent,
wherein an adhesiveness of the bonding agent can be altered by applying a voltage or a voltage and a current;
a writing surface comprising a first electrode; and
an erasing tool comprising a second electrode.
2. The system according to claim 1 , wherein the applied voltage is between about 0.01 V to about 48 V.
3. The system according to claim 1 , wherein the writing surface is at least partially electroconductive.
4. The system according to claim 1 , wherein the writing surface is a porous writing surface configured to receive the ink comprising the coloring agent and the bonding agent.
5. The system according to claim 1 , wherein an electrochemical oxidation of the bonding agent leads to a reduction of its adhesiveness.
6. The system according to claim 1 , wherein the bonding agent comprises a catechol and/or a catechol derivative.
7. The system according to claim 1 , wherein the bonding agent comprises dopamine, polymerized dopamine, dopamine methacrylamide or acetyl dopamine.
8. The system according to claim 1 , wherein the coloring agent comprises a dye.
9. The system according to claim 1 , wherein the coloring agent comprises a dye which may form a salt with the bonding agent.
10. The system according to claim 1 , wherein the ink comprises a solvent, wherein the coloring agent comprises a pigment, and wherein the pigment is embedded within the bonding agent after evaporation of the solvent.
11. The system according to claim 1 , wherein the erasing tool comprises a switchable mechanism configured to send a signal to a control system to adjust the applied voltage or voltage and current when the switchable mechanism is actuated.
12. The system according to claim 1 , wherein the writing instrument is a handheld writing instrument.
13. The system according to claim 1 , wherein the bonding agent comprises a catechol and/or a catechol derivative.
14. The system according to claim 1 , wherein the bonding agent comprises dopamine, polymerized dopamine, dopamine methacrylamide or acetyl dopamine.
15. The system according to claim 1 , wherein the coloring agent comprises a dye.
16. The system according to claim 1 , wherein the coloring agent comprises a dye which may form a salt with the bonding agent.
17. A system comprising:
a writing instrument comprising an ink,
wherein the ink comprises a coloring agent and a bonding agent, and
wherein an adhesiveness of the bonding agent can be altered by applying a voltage or a voltage and a current; and
a writing surface comprising a first electrode and a second electrode,
wherein the writing surface comprises a multiplicity of first electrodes and second electrodes, wherein the multiplicity of first electrodes and second electrodes are configured to apply either voltage or voltage and current to at least a part of the writing surface, and wherein the multiplicity of first electrodes and second electrodes include micropins distributed in the writing surface.