Fluid zum Löschen von Tinte und Kit damit

Details

Veröffentlichungs-Nr.

EP4050074

Aktenzeichen

EP21305223

Anmeldetag

25. Februar 2021

Veröffentlichung

1. Januar 2025

Erteilung

1. Januar 2025

Rechtsraum

EP

IPC

C09D11/16C09D11/17C09D10/00

Abstract

The present invention concerns a kit comprising a) an aqueous writing ink composition, containing - metal nanoparticles as coloring agent wherein said metal nanoparticles essentially consists of metal and said metal is chosen from silver, gold, aluminum and/or copper and - a dispersing agent, and b) an eradicator fluid containing at least one oxidizing agent.It also concerns An aqueous eradicator fluid for erasing an aqueous writing ink composition containing metal nanoparticles as the coloring agent, in which said metal nanoparticles essentially consists of metal and said metal is chosen from silver, gold, aluminum and/or copper, said fluid containing - an oxidizing agent chosen in the group consisting of hydrogen peroxide H₂O₂, oxygen, compounds capable of producing hydrogen peroxide by hydrolysis selected among nitric acid, organic peroxide, urea peroxide, alkali metal bromates and perborates, permanganate, and mixtures thereof and - a volatile solvent.It further concerns a writing instrument containing the eradicator fluid, the use of the eradicator fluid and/or of the kit containing it and a method of correcting errors of a written mark made on porous substrate.

Anmelder

Firmen

Société BIC
Université de Haute Alsace
Centre national de la recherche scientifique

Land

🇫🇷 Frankreich

Fachgebiete