Abstract: Examples consistent with the invention include a reusable device for writing, displaying and deleting information with an electronic device on a support device having bistable liquid crystals. The reusable device includes a substrate onto which are successively applied and from the substrate: an electricity conducting coating; an optical coating that can absorb all or part of the surrounding light; a coating of a transparent substance in which a plurality of bistable liquid crystals are emulsioned; at least one electricity conducting element being electrically connected to the electricity conducting coating via an electrical voltage generator to form an electric circuit.

Abstract: The present invention relates to an inkjet recording element having good dye keeping properties in time, good image quality, as well as instant dryness. Said inkjet recording element comprises a porous polyester support and at least one ink-receiving layer, said ink-receiving layer comprising at least one aluminosilicate polymer obtainable by a preparation method consisting in treating an aluminum halide with an alkyl orthosilicate only having hydrolyzable functions with an aqueous alkali in the presence of silanol groups, the aluminum concentration being maintained less than 0.3 mol/l, the AI/Si molar ratio being maintained between 1 and 3.6 and the alkali/Al molar ratio being maintained between 2.3 and 3; and then stirring the resulting mixture at ambient temperature in the presence of silanol groups for long enough to form the aluminosilicate polymer. In addition, the ink-receiving layer does not contain a binder.

Abstract: The present invention relates to an inkjet recording element having good dye keeping properties in time and good image quality. Said inkjet recording element comprises a porous polyester support and at least one ink-receiving layer, said ink-receiving layer comprising at least one hydrosoluble binder and at least one aluminosilicate polymer obtainable by a preparation method consisting in treating an aluminum halide with an alkyl orthosilicate only having hydrolyzable functions with an aqueous alkali in the presence of silanol groups, the aluminum concentration being maintained less than 0.3 mol/l, the Al/Si molar ratio being maintained between 1 and 3.6 and the alkali/Al molar ratio being maintained between 2.3 and 3; and then stirring the resulting mixture at ambient temperature in the presence of silanol groups for long enough to form the aluminosilicate polymer.

Abstract: The present invention relates to an inkjet recording element having good dye keeping properties in time, good image quality, as well as instant dryness. Said inkjet recording element comprises a porous polyester support and at least one ink-receiving layer, said ink-receiving layer comprising at least one aluminosilicate polymer obtainable by a preparation method consisting in treating an aluminum halide with a mixture of at least one silicon alkoxide only having hydrolyzable substituents and at least one silicon alkoxide having a non-hydrolyzable substituent, with an aqueous alkali in the presence of silanol groups, the aluminum concentration being maintained less than 0.3 mol/l, the Al/Si molar ratio being maintained between 1 and 3.6 and the alkali/Al molar ratio being maintained between 2.3 and 3; and then stirring the resulting mixture at ambient temperature in the presence of silanol groups for long enough to form the hybrid aluminosilicate polymer.

Abstract: The present invention relates to an inkjet recording element having good dye keeping properties in time and good image quality. Said inkjet recording element comprises a porous polyester support and at least one ink-receiving layer, said ink-receiving layer comprising at least one hydrosoluble binder and at least one aluminosilicate polymer obtainable by a preparation method consisting in treating an aluminum halide with a mixture of at least one silicon alkoxide only having hydrolyzable substituents and at least one silicon alkoxide having a non-hydrolyzable substituent, with an aqueous alkali in the presence of silanol groups, the aluminum concentration being maintained less than 0.3 mol/l, the Al/Si molar ratio being maintained between 1 and 3.6 and the alkali/A 1 molar ratio being maintained between 2.3 and 3; and then stirring the resulting mixture at ambient temperature in the presence of silanol groups for long enough to form the hybrid aluminosilicate polymer.

Abstract: The present invention relates to a process and an apparatus for detecting a fault in a flowing liquid sheet and in particular in a coating curtain. The process comprises the following steps: transmitting an electromagnetic beam to the sheet so as to irradiate approximately the entire width of the sheet in a direction approximately transverse to the sheet; recovering a beam reflected by the sheet by way of a collector; defining a reference position of the reflected beam on the collector; and noting the deviations of the reflected beam in relation to the previously defined reference position.

Abstract: The present invention relates to a process and an apparatus for detecting a fault in a flowing liquid sheet and in particular in a coating curtain. The process comprises the following steps: transmitting an electromagnetic beam to the sheet so as to irradiate approximately the entire width of the sheet in a direction approximately transverse to the sheet; recovering a beam reflected by the sheet by way of a collector; defining a reference position of the reflected beam on the collector; and noting the deviations of the reflected beam in relation to the previously defined reference position.

Abstract: The present invention relates to a process and an apparatus for detecting a fault in a flowing liquid sheet and in particular in a coating curtain. The process comprises the following steps: transmitting an electromagnetic beam to the sheet so as to irradiate approximately the entire width of the sheet in a direction approximately transverse to the sheet; recovering a beam reflected by the sheet by way of a collector; defining a reference position of the reflected beam on the collector; and noting the deviations of the reflected beam in relation to the previously defined reference position.