Color changing correction fluid

C - Chemistry – Metallurgy – 09 – D

Patent

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Details

C09D 10/00 (2006.01)

Patent

CA 2540743

An improved color changing correction fluid is provided which includes either a volatile base or a volatile acid in combination with a color changing pH indicator, all in a water based fluid or system. As the fluid dries, the volatile base or acid evaporates along with the water and the pH color changing indicator changes from a colored state to a clear state. For white paper, a white pigment is utilized and therefore the fluid changes from a colored state to a white finished state as the solvent water and acid or base evaporates. Different color pigments can be utilized to match the color of the particular paper or substrate.

Cette invention se rapporte à un liquide correcteur changeant de couleur amélioré, qui contient soit une base volatile soit un acide volatil associé à un indicateur de pH changeant de couleur, le tout dans un liquide ou un système à base d'eau. Au fur et à mesure que le liquide sèche, la base ou l'acide volatil s'évapore avec l'eau et l'indicateur de pH changeant de couleur passe d'un état coloré à un état transparent. Pour du papier blanc, on utilise un pigment blanc et le liquide passe par conséquent d'un état coloré à un état fini blanc, au fur et à mesure que le solvant à base d'eau et l'acide ou la base s'évaporent. Différents pigments colorés peuvent être utilisés pour s'adapter à la couleur du papier ou du substrat particulier.

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