A wet coating composition useful for coating a cellulosic fiber-based substrate is provided. The composition includes two aqueous emulsions. The first emulsion includes an oxidized paraffin/polyethylene wax and the second emulsion includes an ethylene/acrylic acid copolymer wax, ethylene/acrylic amide copolymer wax, ethylene/acrylic acid/acrylic amide copolymer wax or a mixture thereof. The oxidized paraffin/polyethylene wax has a surface energy less than or equal to 2 m N/m being substantially dispersive energy. The wet coating composition when dried forms a coating having a surface energy ranging from 20 to 60 m N/m being the sum of dispersive and polar energies. A process for treating a cellulosic fiber-based substrate with the wet coating composition, a substrate coated and articles including the coated substrate are also described. The process involves a heating step to allow migration of the coating towards a core of the cellulosic fiber-based substrate.

A coating unit is located after a sheet-fed digital printer on a manufacturing line. As a response to a workpiece entering the coating unit from the printer, coating substance is dosed onto a plate cylinder, and said plate cylinder is rotated to transfer said coating substance onto the workpiece, which is then transferred further on the manufacturing line. As a response to a first time limit expiring after transferring the workpiece further without a subsequent workpiece entering the coating unit, the rotation of the plate cylinder is stopped.

An article in the form of a printable substrate having a showthrough value of about 0.14 or less, and an opacity value of at least about 88% which includes a paper substrate with a first and second surfaces formed of paper fibers having a basis weight of from about 12 to about 32 lbs/1300 ft.sup.2, and a substrate filler in an amount in the range of from 0 to about 30% by weight of the paper substrate; and a surface size layer on at least one of the first and second surfaces, the surface size layer having about 50 lbs or less per ton of the paper substrate of a starch surface sizing agent and a multivalent metal salt drying agent in an amount sufficient to impart to the at least one of the first and second surfaces a black print density value of at least about 0.8 when inkjet printed with pigmented inks and a waterfastness value of at least about 85% when inkjet printed with dye-based inks, the printable substrate having a MD tensile strength of at least about 12 lbs/in. and a CD tensile strength of at least about 6 lbs/in. Also, a method for preparing such a printable substrate.

A chemical solution spraying method for spraying a chemical solution onto a canvas K1 has a loop shape in a side view while reciprocating two nozzle devices S at the same speed along rail L extending in a width direction of canvas K1 with respect to canvas K1, in which time period Tc during which canvas K1 is in contact with wet paper X is 0.03 seconds or more, time period Tn required for nozzle devices S to each one-way move is 0.5 to 10 minutes, traveling speed Vp of canvas K1 is 500 m/min or more, length K of canvas K1 is 20 to 80 m, a number of times of contact N of any point on a surface of canvas K1 with wet paper X during time period Tn, time period Tn, traveling speed Vp, and length K satisfy a relationship of N=(Tn.Math.Vp)/K, under predetermined conditions.

A method and a system for coating products are provided. The method includes the steps of applying a coating liquid to a product and removing excess coating liquid from the product. It is desirable to provide a method and system for efficiently and reliably coating delicate or easily deformable products, such as products molded from a pulp fiber slurry. The method includes fixing the product to a receiving portion of a product carrier that is configured in the same shape as the product, such that an exterior surface of the product abuts the interior concave surface of the receiving portion of the device. A coating liquid is applied to the product in the product carrier. The product carrier is affixed to a centrifuging device and the coating liquid is dispersed over the surface of the product using centripetal force.

The invention relates to a process for the acylation of a solid material, known as the hydroxylated material, bearing hydroxyl groups (OH), known as reaction-generating hydroxyls, which are accessible and capable of reacting with at least one fatty acid chloride in gaseous form, said hydroxylated material being scrolled through a chamber, known as the acylation chamber, delimiting an internal space under a gaseous atmosphere. The invention also relates to an acylation device for performing said process.

Exemplary embodiments provide an erasable medium having an overcoat layer on a photochromic layer to provide a non-adhesive surface for the erasable medium when exposed to high temperatures, wherein the overcoat layer can include a latex or a mixture of a latex and a wax.

A process for providing printable substrates by separately treating one or both surfaces of a paper substrate with an optical brightening agent (OBA) and a multivalent metal salt drying agent, where one or both surfaces of the paper substrate is treated with one of these two agents at the size press, and where the surface(s) is treated with the other of these two agents before or after the size press.

The invention relates to a process for preparing an aqueous dispersion of a polymer P, which comprises the emulsion polymerization of vinyl acetate, an acrylate monomer, which is a C.sub.1-C.sub.10 alkyl acrylate or a C.sub.1-C.sub.10 methacrylate, an ,-ethylenically unsaturated C.sub.3-C.sub.8 carboxylic acid, glycidyl methacrylate or glycidyl acrylate, optionally an ethylenically unsaturated sulfonic acid and optionally an ethylenically unsaturated other monomer. Furthermore, the aqueous polymer dispersion obtainable from this process and a powder form thereof are disclosed. They are useful for a paper coating slip containing one of the aforementioned forms. A paper or a cardboard, which is coated with the paper coating slip, shows surface strength, which is expressed by a good dry pick resistance, a good wet pick resistance or good offset test results. The aqueous polymer dispersion or the powder form thereof is furthermore useful as a binder.

In some examples, an apparatus to apply a coating to a media includes a first roller to receive a continuous belt that is to receive a coating from a second roller and to transfer the coating to the media, the first roller having a variable dimension to provide an adjustable width of the continuous belt to the second roller.