A process for the deinking of coated paper or paperboard, comprising the following steps: (i) providing a coated paper or paperboard comprising, (a) at least one layer consisting of a coating composition comprising, a calcium- or magnesium-exchanged clay, wherein the content of the calcium- or magnesium-exchanged clay in the coating composition, is in the range from 3 to 15 wt.-%, based on the total weight of the coating composition, a binder, wherein the binder is water soluble carboxymethylcellulose, and wherein the content of the binder in the coating composition is in the range from 0.1 to 12 wt. %, based on the total weight of the coating composition, (b) at least one layer having a thickness in the range from 0.1 to 10 μm comprising ink, wherein layer (a) is deposited on the paper or paperboard before layer (b) (ii) activating the calcium- or magnesium-exchanged clay before or during step (iii) by providing in step (i) the binder, wherein the binder is soluble in water and comprises monovalent ions selected from the group consisting of sodium, lithium, potassium, ammonium and mixtures thereof, wherein the water-soluble binder comprises an excess of sodium ions with respect to calcium or magnesium ions, (iii) treating the coated paper or paperboard as provided in step (i) with water to obtain an aqueous suspension comprising at least ink, clay particles and a paper pulp or a paper residue. (i) providing a coated paper or paperboard comprising, (a) at least one layer consisting of a coating composition comprising, a calcium- or magnesium-exchanged clay, wherein the content of the calcium- or magnesium-exchanged clay in the coating composition, is in the range from 3 to 15 wt.-%, based on the total weight of the coating composition, a binder, wherein the binder is water soluble carboxymethylcellulose, and wherein the content of the binder in the coating composition is in the range from 0.1 to 12 wt. %, based on the total weight of the coating composition, (b) at least one layer having a thickness in the range from 0.1 to 10 μm comprising ink, wherein layer (a) is deposited on the paper or paperboard before layer (b) (a) at least one layer consisting of a coating composition comprising, a calcium- or magnesium-exchanged clay, wherein the content of the calcium- or magnesium-exchanged clay in the coating composition, is in the range from 3 to 15 wt.-%, based on the total weight of the coating composition, a binder, wherein the binder is water soluble carboxymethylcellulose, and wherein the content of the binder in the coating composition is in the range from 0.1 to 12 wt. %, based on the total weight of the coating composition, a calcium- or magnesium-exchanged clay, wherein the content of the calcium- or magnesium-exchanged clay in the coating composition, is in the range from 3 to 15 wt.-%, based on the total weight of the coating composition, a binder, wherein the binder is water soluble carboxymethylcellulose, and wherein the content of the binder in the coating composition is in the range from 0.1 to 12 wt. %, based on the total weight of the coating composition, (b) at least one layer having a thickness in the range from 0.1 to 10 μm comprising ink, (ii) activating the calcium- or magnesium-exchanged clay before or during step (iii) by providing in step (i) the binder, wherein the binder is soluble in water and comprises monovalent ions selected from the group consisting of sodium, lithium, potassium, ammonium and mixtures thereof, wherein the water-soluble binder comprises an excess of sodium ions with respect to calcium or magnesium ions, (iii) treating the coated paper or paperboard as provided in step (i) with water to obtain an aqueous suspension comprising at least ink, clay particles and a paper pulp or a paper residue.