Abstract: Disclosed is a heat-sensitive recording material useful in the manufacture of thermal paper and thermal labels. The material comprises a cellulosic or other suitable substrate, a thermally imprintable color-producing layer, and a protective layer over the color-producing layer. It may also include a second protective layer and/or a pressure-sensitive adhesive layer, on the surface of the substrate opposite from the color-producing layer, and a releasable liner covering the adhesive layer. The color-producing layer includes a basic, acid-neutralizing agent for both reducing background discoloration during manufacturing and increasing image definition. The protective layer comprises a polymeric binder which is both ionically and covalently cross-linked to provide improved resistance to hydrophobic and hydrophillic solvents.

Abstract: A postal card or mailer construction comprising a cover sheet adhered to a base sheet is provided which is simple to manufacture and print by automated systems and which is capable of providing hidden confidential information to an addressee. Upon receipt, the addressee can readily peel back the cover sheet and read the confidential information. Through the use of a releasable adhesive, once delaminated, all surfaces of the postal card construction have nontacky surfaces, permitting easy handling and storage by the recipient. The construction includes a base sheet, a cover sheet overlying the base sheet, and a releasable adhesive securing a first surface of the cover sheet to a first surface of the base sheet such that the cover sheet and base sheet are readily separable. The releasable adhesive contains therein a first color former composition which, when exposed to a second color developer composition, forms a distinctive color.

Abstract: A scratch-off game piece which contains a fragrance which is released during the game play action. The game piece is constructed by application of layers of fragrance containing material and scratch-off material over a support layer of printed sheet material such that when the scratch-off material is removed by the player, the fragrance containing capsules are ruptured and fragrance is released.

Abstract: Sheets of material, such as paper, having one one face a coating A of image-forming material (such as the CB coating of a carbonless copy system) are formed into pairs (51,52) connected together along one edge (53), by folding or by means of adhesive, with the coated faces (51a, 52a) in face-to-face contact leaving the remaining faces (51b, 25b) exposed, and such double sheets (50) are formed into stacks for use in non-impact printing processes by a method in which the printing is performed successively on the two exposed faces of the pairs of sheets and the two sheets are then separated.

Abstract: A carbonless copying system which enables the formation of images that are capable of being detected by an optical character recognition (OCR) device. A phenolic resin or reactive clay image-forming component is applied as a CF coating on a recording substrate. A first complementary image-forming component which is a microencapsulated dye precursor that is capable of forming a colored image when contacting the CF coating is applied as a CB coating to a transfer substrate. A second complementary image-forming component, which is a microencapsulated dye precursor capable of forming a colored image when contacting the CF coating that is detectable by an OCR device, is applied as a CB coating to selected portions of the transfer substrate.

Abstract: The lower side of a transmitter sheet (1) of a copy form set of chemically reacting color reaction paper provided with a CB coating (2) is zonewise provided with an additional ink layer (4) e.g. on wax basis. On writing or printing upon the copy form set within the intensification zone (3) defined by the additional ink layer (4) the color pigments of the additional ink layer (4) are partially or completely dissolved by means of the CB substances of the CB coating and transmitted to the CF coating (5) of the receiver sheet (6). This results in that the copy is itensified within the area of the intensification zone (3), thus becoming particularly machine-readable.

Abstract: A carbonless copy system which enables the formation of a plurality of different colored images on a substrate. A phenolic resin or reactive clay image-forming component is applied as a CF coating on a recording substrate. One or more coatings of encapsulated dye precursors (complementary image-forming components) are applied to selected portions of the CF coating on the recording substrate and one or more coatings of encapsulated dye precursors are applied to selected portions of a transfer substrate. The dye precursor coatings are capable of forming different colored reaction products when coming into contact and reacting with the phenolic resin or reactive clay. Upon applying pressure to the transfer substrate, the dye precursor capsules are ruptured, releasing the dye precursor which contacts and reacts with the phenolic resin or reactive clay to form the colored reaction products.

Abstract: The present invention provides a laminate construction including a backing sheet, which may be in the form of a continuous web, and a face sheet covering at least a portion of the backing sheet. A releasable adhesive secures a first or lower surface of the face sheet to a first or upper surface of the backing sheet such that the face sheet and backing sheet are readily separable. The releasable adhesive contains therein a first composition which, when subjected to an imaging force, forms a latent image on both of the first surfaces of the face and backing sheets. This latent image may be developed at a later time by contacting the image with a second composition which, when exposed to the first composition, forms a visible image. In the laminate, the face sheet may be imprinted with legible and/or covert information. The covert information may be duplicated on the underside of the face sheet or on one or more intermediate sheets as well as a backing sheet.

Abstract: A sheet is provided which upon abrasion of one surface will reveal a preprinted message without removal of a cover layer.

Abstract: Supply paper is provided at spaced longitudinal positions along one side with a repositionable adhesive. A receptive coating comprised of a CF oil-based ink is applied at spaced longitudinal positions along the opposite of the paper, the positions along opposite sides of the paper being out of registration one with the other. The paper is cut into strips, assembled to form pads with the repositionable adhesive holding the paper strips one to the other at one end thereof. A paper strip may be removed from the pad and flexed to form a band with opposite ends overlying one another with the adhesive in contact with the receptive coating. The repositionable adhesive and receptive coating cooperate to provide enhanced adhesion.

Abstract: A more efficient and versatile method for color and halftone reproduction of artwork utilizing a colorless formulation that can be incorporated into art materials. When a mildly acidic spray is applied to the artwork which contains the formulation, the formulation turns blue. The blue color allows reproduction of red and yellow in certain photographic systems and can also be used in halftone reproduction to preserve light colors during the exposure step to eliminate dots from the background areas.

Abstract: A negative type heatsensitive recording material which can realize high contrast image suitable to overhead projector, comprising on a support a heatsensitive layer prepared by coating a composition containing an emulsified dispersion, which is obtained by dissolving a colorless or light colored electron donating dye precursor and a color developer in an organic solvent slightly soluble or insoluble in water then subjecting the resulting solution to an emulsifying dispersion treatment, and decolorizercontaining microcapsules.

Abstract: A desensitizer composition consisting essentially of a 2,2,6,6-tetramethylpyperidine compound as a desensitizer and additives comprising a natural or synthetic high-molecular weight compound and a pigment, a color developer sheet containing the desensitizer composition and a process for forming an image using the color developer sheet. The composition exhibits superior desensitizing effects, especially when used with fluoran color formers.

Abstract: Correction compositions for correcting markings provided on the surface of a pressure-sensitive chemical recording medium carrying a developer material which comprises an acidic developer by interaction of the developer material with a color-providing material. The compositions comprise a substantially uniform dispersion of an opacifying pigment, a polymeric film-forming material, and a Lewis acid. The composition is applied to a marking to provide a film which covers the marking, and a visible corrected marking can be provided on the film by applying a pattern of color-providing material corresponding to the corrected marking to the film.

Abstract: Disclosed herein is a partially pressure-sensitive recording paper on which an ink has been applied partially, the ink having been prepared by uniformly dispersing microcapsules having a solution of a colorless electron-donating dyestuff as the core material, a thermally melting solid substance and an organic solvent having a mean boiling point of from 250.degree. to 350.degree. C. and a content of aromatic ring carbon of more than 25% while restraining the weight ratio of the solvent to the solid substance and the weight ratio of the solid substance to the microcapsules respectively in a prescribed range.

Abstract: A writing set comprising a combination of paper printed thereon with two or more coloring bands using two or more types of leuco dye which develop different colors and a writing means which contains a solution of acid materials which develops the color of the leuco dyes.When characters, pictures, etc. are written on the paper, the colorless leuco dyes in the written portion develop color to form colorful characters, pictures, etc.

Abstract: This invention relates to a method of recording an image, characterized by superposing a heat-sensitive transfer medium on a plain paper and heating the medium thereby transferring a leuco dye from a leuco dye-containing transfer layer and a developer from a developer-containing transfer layer respectively onto the plain paper to react the leuco dye and the developer, said heat-sensitive transfer medium being prepared by having a transfer layer containing a leuco dye as the main component and a transfer layer containing a developer as the main component respectively applied on a single substrate or two separate substrates.

Abstract: A thermosensitive recording adhesive sheet capable of forming colored images thereon upon application of heat, comprising (a) a support material with print patterns on the front side or back side thereof, (b) a thermosensitive coloring layer formed on the support material, (c) an adhesive layer formed on the back side of the support material, opposite to the thermosensitive coloring layer, and (d) a disposable backing sheet which is attached to the adhesive layer and can be peeled off the adhesive layer when the thermosensitive recording adhesive label is used. When necessary, (e) a protective layer for protecting the thermosensitive coloring layer and for improving the thermal head matching properties of the thermosensitive coloring layer can be formed on the thermosensitive coloring layer.

Abstract: In a heat-sensitive and heat-transferable recording sheet comprising a substrate, a heat-sensitive, color-forming layer provided on the front side of said substrate and a heat-transferable layer provided on the back side of said substrate, background fogging can be prevented by allowing the heat-transferable layer to be composed essentially of an electron-donating colorless dye, an electron-accepting compound, a low-melting substance and a desensitizer.

Abstract: Disclosed herein are a recording paper which is partially pressure-sensitized, comprising microcapsules containing a solution of a colorless color former, sheet material and binder, the microcapsules being fixed to a specified part of a surface of the sheet material via the binder painted on the specified part and majority of the fixed microcapsules having at least a part of the microcapsule exposed to outside of the binder, and a process for producing the recording paper which is partially specified.