Method of producing an article selected from the group consisting of casting mold, core and feeder by repair or completion of a corresponding defective or incomplete article, having at least the following steps: producing or providing in the foundry: - a first component, comprising a first binder component of a binder system and an amount of a first mold base material and, spatially separated therefrom, - a second component, comprising a second binder component of the binder system and an amount of a second mold base material wherein - the first binder component and the second binder component are suitable for chemical reaction with one another and for curing of a mixture of the first component and the second component, - wherein the first binder component and the second binder component are each present as constituents of the first component or the second component in spatially separate containers, mixing by contacting at least the first component and the second component that has been produced or provided spatially separately therefrom in a particular mass ratio, so as to result in a self-curing molding compound, shaping and curing the self-curing molding compound that arises in step, so as to result in a cured molded product of the first component and of the second component, which forms a region of the article on conclusion of the production method. by repair or completion of a corresponding defective or incomplete article, having at least the following steps: producing or providing in the foundry: - a first component, comprising a first binder component of a binder system and an amount of a first mold base material and, spatially separated therefrom, - a second component, comprising a second binder component of the binder system and an amount of a second mold base material wherein - the first binder component and the second binder component are suitable for chemical reaction with one another and for curing of a mixture of the first component and the second component, - wherein the first binder component and the second binder component are each present as constituents of the first component or the second component in spatially separate containers, mixing by contacting at least the first component and the second component that has been produced or provided spatially separately therefrom in a particular mass ratio, so as to result in a self-curing molding compound, shaping and curing the self-curing molding compound that arises in step, so as to result in a cured molded product of the first component and of the second component, which forms a region of the article on conclusion of the production method. producing or providing in the foundry: - a first component, comprising a first binder component of a binder system and an amount of a first mold base material and, spatially separated therefrom, - a second component, comprising a second binder component of the binder system and an amount of a second mold base material wherein - the first binder component and the second binder component are suitable for chemical reaction with one another and for curing of a mixture of the first component and the second component, - wherein the first binder component and the second binder component are each present as constituents of the first component or the second component in spatially separate containers, - a first component, comprising a first binder component of a binder system and an amount of a first mold base material and, spatially separated therefrom, - a second component, comprising a second binder component of the binder system and an amount of a second mold base material wherein - the first binder component and the second binder component are suitable for chemical reaction with one another and for curing of a mixture of the first component and the second component, - wherein the first binder component and the second binder component are each present as constituents of the first component or the second component in spatially separate containers, mixing by contacting at least the first component and the second component that has been produced or provided spatially separately therefrom in a particular mass ratio, so as to result in a self-curing molding compound, shaping and curing the self-curing molding compound that arises in step, so as to result in a cured molded product of the first component and of the second component, which forms a region of the article on conclusion of the production method.