Abstract: A liquid developing agent comprising a resin dispersed in a nonaqueous solvent wherein said comprisecopolymer resin grains produced by polymerization of a solution containing one monofunctional monomer (a) which is soluble in said nonaqueous solvent but is rendered insoluble by polymerization and at least one monomer (B) which contains at least two polar groups and/or polar linkage groups and is represented by ##STR1## in the presence of a resin for dispersion stabilization which is soluble in said nonaquous solvent and is a polymer which has repeating units represented by the general formula (I) below ##STR2##

Abstract: An encapsulated toner composition comprised of a core comprised of a silane-modified polymer resin and pigment or dyes; and a polymeric shell.

Abstract: A liquid developer for electrostatic photography comprising a resin dispersed in a non-aqueous solvent having an electric resistance of at least 10.sup.9 .OMEGA. cm and a dielectric constant of not higher than 3.5, wherein the dispersed resin is a copolymer resin obtained by polymerizing a solution containing at least one monofunctional monomer (A) which is soluble in the aforesaid non-aqueous solvent but becomes insoluble therein after being polymerized and at least one resin which is a polymer having at least a recurring unit represented by following formula (I), a part of the polymer being crosslinked, a polymerizable double bond group copolymerizable with said monomer (A) being bonded to one terminal only of at least one polymer main chain thereof, and said resin being soluble in the aforesaid non-aqueous solvent; ##STR1## wherein X.sup.1, R.sup.0, a.sup.1 and a.sup.2 are as defined in the specification.

Abstract: An electrophotographic toner composition is provided. It contains a vinyl polymer having a number average molecular weight of 1,000-10,000, a weight average molecular weight/number average molecular weight ratio of 41-200, a glass transition temperature of 50.degree.-70.degree. C., and specific shear rates at 110.degree. C. and 190.degree. C. respectively. The toner composition affords vivid copy marks even when used in a small amount, and exhibits good fixing property even at low temperatures.

Abstract: Electrostatic liquid developer consisting essentially of(A) nonpolar liquid, Kauri-butanol value less than 30,(B) particles of thermoplastic resin having free carboxyl groups (<30.mu.m ave particle size),(C) nonpolar liquid soluble oil-soluble petroleum sulfonate or anionic glyceride charge director, and(D) at least one organometallic compound as defined present in 0.01 to 0.15 part by weight metal based on the total weight of liquid developer. The process of preparation of the liquid developer is also disclosed. The developers demonstrate reduced mottle in a fused image. The developers are used in copying, color proofing, preparation of lithographic printing plates and resists.

Abstract: Liquid toners for developing electrophotographic images contain dispersed toner particles which are based on a polymer with multi-characteristics. These particles comprise a thermoplastic resinous core with a Tg below room temperature, which is chemically anchored to an amphipathic copolymer steric stabilizer containing covalently attached groups of a coordinating compound which in turn are capable of forming covalent links with organo-metallic charge directing compounds and a thermoplastic ester resin that functions as a charge enhancing component for the toner. The toner particles so formed have advantageous properties of high charge/mass, and good charge and dispersion stability.

Abstract: Disclosed is a liquid developer composition for electrophotography. In a non-aqueous solvent there is dispersed copolymer resin particles having been polymerized from at least one monofunctional monomer (A) and at least one monofunctional macromonomer (B) such as (III) ##STR1## in the presence of a dispersion stabilization resin copolymerizable with a mono-functional monomer (A).

Abstract: The present invention provides an electrophotographic toner, particularly with a good transferability and a good flowability, which comprises a binder resin and a coloring agent, the binder resin containing a lactone-modified epoxy resin, obtained by subjecting all or a portion of secondary hydroxyl groups of epoxy compounds having hydroxyl groups in the molecules to ring opening polymerization of lactone.The present invention further provides an electrophotographic toner with a good transferability, a good flowability and a good offset resistance and also with a fixability of transferred images, which comprises a binder resin and a coloring aent, the binder resin containing:(1) a lactone-modified epoxy resin, obtained by subjecting all or a portion of secondary hydroxyl groups of epoxy compounds having hydroxy groups in the molecules to ring opening polymerization of lactone,(2) styrene-butadiene rubber, and(3) polyester resin.

Abstract: A liquid developer for electrostatic photography comprising a resin dispersed in a non-aqueous solvent having an electric resistance of at least 10.sup.9 .OMEGA.cm and a dielectric constant of not higher than 3.5, wherein the dispersed resin is a polymer resin obtained by polymerizing a solution containing at least one mono-functional monomer (A) which is soluble in the aforesaid non-aqueous solvent but becomes insoluble after being polymerized, in the presence of at least one resin which is soluble in the aforesaid non-aqueous solvent and does not have a graft group polumerizable with the monomer and at least one oligomer (B) having a number average molecular weight of not more than 1.times.10.sup.4 and having at least one polar group selected from a carboxy group, a sulfo group, a hydroxy group, a formyl group, an amino group, a phosphono group, and ##STR1## wherein R.sup.0 represents a hydrocarbon group or --OR.sup.1, (wherein R.sup.

Abstract: A developer for electrostatic photography comprises toner and carrier coated with a composition comprising a silicone resin having (II) and (II') and at least one compound represented by following formula (III), (IV) or (V): ##STR1##

Abstract: A toner composition comprised of a crosslinked thermotropic liquid crystalline polymer, a branched liquid crystalline polymer, or mixtures thereof.

Abstract: A toner for developing electrostatic latent images with a good combination of fixability, anti-offset characteristic, anti-sticking characteristic and pulverizability is provided as a composition comprising a colorant or magnetic material and a binder resin. The binder resin has 0.1 to 60 wt. % of a chloroform-insoluble or a THF (tetrahydrofuran)-insoluble and a THF-soluble, the THF-soluble providing a molecular weight distribution in the chromatogram of GPC (gel permeation chromatography) thereof such that there are a main peak in the molecular weight range of 1,000 to 25,000 and a sub-peak or shoulder in the molecular weight range of 2,000 to 150,000. The binder resin may suitably be obtained through two polymerization steps including a solution polymerization step and a suspension polymerization step.

Abstract: A toner and developer composition comprised of polysilylenes, poly(germylenes), or mixtures thereof.

Abstract: A toner for developing latent electrostatic images is disclosed, which comprises a binder resin comprising a component selected from the group consisting of: (1) a mixture of the ternary copolymers of styrene, methyl acrylate, and ethyl acrylate, (2) a mixture of the binary copolymers of two monomers from among the monomers of styrene, methyl acrylate, and ethyl acrylate and homopolymers containing the remaining monomer or the copolymers of that monomer and the other monomers, and (3) a mixture of the respective homopolymers.

Abstract: A toner composition comprised of resin particles selected from the group consisting of a semicrystalline polyolefin and copolymers thereof which a melting point of from about 50.degree. C. to about 100.degree. C., and pigment particles.

Abstract: Disclosed is a toner for developing statically charged images, which has a substantially spherical shape and comprises a copolymer comprising, as a constituent, a water-soluble monomer having a group--SO.sub.3 X in which X stands for hydrogen, sodium, potassium or calcium.This toner has a good charge characteristics, an excellent flowability and a uniform particle size. If this toner is used, fogging is not caused in a copied image, and the obtained image is sharp and has an excellent resolving power.This toner is prepared by a process for the preparation of a toner for developing statically charged images, which comprises incorporating a copolymer comprising a water-soluble monomer having a group--SO.sub.3 X in which X stands for hydrogen, sodium, potassium or calcium and an oil-soluble monomer into a polymerizable composition comprising a polymerizable monomer, an initiator and a colorant, and suspension-polymerizing the composition.

Abstract: This invention relates to a toner for development of electrostatic images to be used for development of electrostatic images formed in electrophotography, electrostatic printing, electrostatic recording, etc., and an image forming method by use thereof.

Abstract: An electrophotographic developer composition comprises a binder resin, which comprises a polyester as the major component, said polyester obtained by co-condensation polymerization of(i) a diol component represented by the general formula: ##STR1## wherein R is an ethylene or propylene group and x and y are each an integer of 1 or more, with the proviso that the average sum total of x and y is 2 to 7, with(ii) a dicarboxylic acid, an anhydride or a lower alkyl ester thereof and(iii) a polycarboxylic acid having at least three carboxyl groups or an anhydride or a lower alkyl ester thereof or a polyhydric alcohol having at least three hydroxyl groups and having an OHV/AV value of at least 1.2 wherein AV is an acid value of the polyester and OHV is a hydroxyl value thereof, and at least two charge controllers.

Abstract: Electrostatic liquid developer having improved negative charging characteristics consisting essentially of(A) nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount,(B) thermoplastic resin particles having an average by area particle size of less than 10 .mu.m,(C) charge director compound, and(D) at least one soluble solid or liquid organic monofunctional amine compound of the formula: R.sub.n NH.sub.3-n wherein R is alkyl, cycloalkyl or alkylene, or substituted alkyl, the alkyl, cycloalkyl, alkylene or substituted alkyl group being of 1 to 50 carbon atoms, and n is an integer of 1 to 3.Optionally, a colorant, e.g., a pigment; metallic soap, adjuvant can be present. The electrostatic liquid developer is useful in copying, making proofs including digital color proofs, lithographic printing plates, and resists.

Abstract: A color toner composition for developing electrostatic images comprises a coloring agent and a binder resin, wherein the binder resin is a vinyl-modified polyester resin obtained by graft polymerizing(a) a vinyl monomer containing an aromatic vinyl monomer and an amino group-containing vinyl monomer to(b) an unsaturated polyester comprising at least aliphatic unsaturated dibasic acid and polyhydric alcohol having a weight average molecular weight of about 5,000 to 15,000, and the component (b) constitutes at least 50% by weight of the vinyl-modified polyester resin and the amino group-containing vinyl monomer constitutes 2 to 20% by weight of the vinyl-modified polyester resin.

Abstract: Positively chargeable toner containing block copolymers for electrostatic reprography, giving improved compatibility with the toner resin. Preferred are block copolymers of styrene with methyl methacrylate and butyl methacrylate as one block and dimethylaminoethyl methacrylate as the other block, quaternized with methyl tosylate or benzyl chloride.

Abstract: Negatively chargeable toner containing block copolymers for electrostatic reprography, giving improved compatibility with the toner resin and higher triboelectric charging. Preferred are block copolymers of styrene, methyl methacrylate and butyl methacrylate as one block and salts or esters of methacrylic acid or acrylic acid as the other block in the copolymer.

Abstract: A toner for developing electrostatic images is disclosed which comprises a coloring agent, a styrene homopolymer or copolymer with a vinyl monomer or moners, and polypropylene having a number average molecular weight of about 3000 to 4000 in an amount between about 0.02 and 40 parts by weight per 100 parts by weight of the styrene homopolymer or copolymer.

Abstract: A toner for developing electrostatic images is disclosed which comprises a coloring agent, a styrene homopolymer or copolymer with a vinyl monomer or moners, and polypropylene having a number average molecular weight of about 3000 to 4000 in an amount between about 0.02 and 40 parts by weight per 100 parts by weight of the styrene homopolymer or copolymer.

Abstract: An electrophotographic toner composition consisting essentially of a binder resin and a dye or pigment, said binder resin being a polymer synthesized from a vinylic monomer and satisfying the conditions represented by the following expressions10.sup.3 .ltoreq.Mp.ltoreq.2.times.10.sup.4,andS.sub.1 :S.sub.2 :S.sub.3 :S.sub.4 =(0.3.about.0.8):1:(0.5.about.1):(0.7.about.1.2)in which the symbols have the following meanings in the molecular weight distribution of the polymer measured by gel permeation chromatography,Mp is a molecular weight of the polymer which shows a peak value in the chromatogram,S.sub.1 is a weight fraction of molecules having a molecular weight of from 0 to 3,000,S.sub.2 is a weight fraction of molecules having a molecular weight of from more than 3,000 to 13,000,S.sub.3 is a weight fraction of molecules having a molecular weight of from more than 13,000 to 50,000, andS.sub.4 is a weight fraction of molecules having a molecular weight of more than 50,000.

Abstract: To overcome the problem of offset images in electrophotography when using a heated roller in fixing a toner image, a toner composition containing a non-linear polyester resin is used. The polyester resin is made from 1-60 mol % polyhydric alcohol having at least three hydroxy groups and 2-65 mol % of a polycarboxylic acid having at least three carboxy groups.

Abstract: A process for producing toners for use in electrophotography which comprises: stirring a mixture of a radical polymerizable liquid monomer and carbon black in the presence of a peroxide polymerization initiator, thereby to disperse the carbon black uniformly and minutely in the monomer; adding an azobisnitrile polymerization initiator to the resultant monomer composition; suspension polymerizing the monomer in an aqueous medium; and recovering and drying the resultant spherical polymer particles.In a preferred process, the suspension polymerization is carried out in an aqueous medium which contains polyvinyl alcohol as a suspending agent, and after the polymerization, the polyvinyl alcohol remaining on the polymer particles is saponified or nitrated to produce a toner with a higher quality.

Abstract: Improved charge control agent for electrophotographic liquid toners comprising a mixture of lecithin and an alkylated poly-N-vinyl pyrrolidone polymer is disclosed. Methods include applying liquid toners comprising such charge control agent mixture to an electroconductive substrate that has been electrostatically charged in the image areas thereof.

Abstract: Disclosed is a toner composition comprised of resin particles, pigment particles, and a wax component comprised of polymeric alcohols of the formulaCh.sub.3 (CH.sub.2).sub.n CH.sub.2 OHwherein n is a number of from about 30 to about 300.

Abstract: Toner for developing an electrostatic latent image comprising (a) a polyester resin of a non-linear copolymer having, as its side chain, an aliphatic hydrocarbon group containing therein 3 to 22 carbon atoms, said copolymer being obtained from polymerization of an etherified bisphenol monomer, a di-carboxilic acid monomer, and a polyhydric alcohol of tri-hydric or more and/or a monomer component containing a polycarboxylic acid monomer of tricarboxylic acid or more carboxylic or more, and at least one compound selected from the group consisting of (b) an alkylene-bis-aliphatic acid amide compound represented by the general formula; ##STR1## wherein R.sub.1 and R.sub.2 are independently selected from saturated or unsaturated aliphatic hydrocarbon groups having not less than 10 carbon atoms, R.sub.3 and R.sub.4 are independently selected from a hydrogen atom and a group represented by --OCR.sub.5 wherein R.sub.

Abstract: Disclosed is a liquid developer for electrophotography wherein the dispersed toner particles have a single peak distribution and the number of particles that are less than 0.06 .mu.m is not greater than 5%, and not more than 3% of the particles are greater than 1.5 .mu.m.

Abstract: A toner for developing electrostatic latent images which comprises a colorant and two kinds of polyester is disclosed.The fFirst polyester is a nonlinear polyester that is composed of monomers including monomers of trivalence or higher valency and which satisfies the following conditions A1 and A2, the second polyester is a nonlinear polyester that is composed of monomers including monomers of trivalence or higher valency and which satisfies the following conditions B1 and B2, and the difference between the softening points of said first and second polyesters is at least 10.degree. C.condition A1: the monomers of trivalence or higher valency represent from 0.05 mol % to less than 15 mol % of all the monomers present;condition A2: the softening point is in the range of from 120.degree. C. to 160.degree. C.;condition B1: the monomers of trivalence or higher valency represent from 0.05 mol % to less than 15 mol % of all the monomers represent;condition B2: the softening point is in the range of from 80.degree.

Abstract: A toner composition for electrophotography excellent in fixing property at a low temperature, offset resistance and blocking resistance comprising a resin binder and a colorant which is dispersed in the resin binder, the resin binder being a nonlinear polyester resin prepared by the reaction of:(a) an acid component comprising at least one long chain dicarboxylic acid selected from the group consisting of a linear aliphatic dicarboxylic acid having 16 to 34 carbon atoms, a dimer acid and a dibasic acid having 21 carbon atoms, an aromatic dicarboxylic acid, and optionally a monocarboxylic acid,(b) an alcohol component comprising an etherificated diphenol and optionally a glycidyl ester of rosin and(c) a crosslinking component comprising a polycarboxylic acid having valency of not less than 3 and/or a polyhydric alcohol having a valency of not less than 3, wherein in case that the long chain dicarboxylic acid and the aliphatic dicarboxylic acid are employed, the contents of the long chain dicarboxylic acid and

Abstract: Negative, liquid electrostatic developer consisting essentially of(A) nonpolar liquid having Kauri-butanol value less than 30, present in major amount. `(B) thermoplastic resin particles having a hydroxycarboxylic acid as defined dispersed therein and average particle size by area being less than 10 .mu.m, and(C) nonpolar liquid soluble ionic or zwitterionic compound which imparts a negative charge to the thermoplastic resin particles. Optionally additional adjuvants are present. The liquid electrostatic developer is useful in copying, making proofs including digital color proofs, lithographic printing plates, and resists.

Abstract: A toner composition comprised of electrostatically attractable fusible powder particles, having an average particle size in the range of 1 to 100 .mu.m and a melt viscosity at 190.degree. C. in the range of 20 to 200 Pa.s, said powder particles comprising a coloring substance, a polymeric binder which consists essentially of a copolymer of:(1) styrene or styrene homologue,(2) an alkyl acrylate or alkyl methacrylate monomer wherein alkyl is a straight chain of at least 8 carbon atoms, and(3) a crosslinking monomer containing at least two ethylenically unsaturated groups,the binder copolymer constituting more than 50% of the total weight of the powder particles.

Abstract: A positively chargeable toner for use in dry electrophotography, said toner comprising (A) a resinous binder composed of at least one resin selected from copolymers of styrene and/or alpha-methylstyrene with alkyl (meth)acrylates, polyester resins and epoxy resins, (B) 1 to 100 parts by weight, per 100 parts by weight of the resinous binder, of a copolymer containing a quaternary ammonium salt group, said copolymer having a weight average molecular weight of from 2,000 to 10,000 and composed of 65 to 97% by weight of recurring units represented by the formula ##STR1## wherein R.sub.1 represents a hydrogen atom or a methyl group, and 35 to 3% by weight of recurring units represented by the formula ##STR2## wherein R.sub.2 represents a hydrogen atom or a methyl group, R.sub.3 represents an alkylene group, and each of R.sub.4, R.sub.5 and R.sub.6 represents an alkyl group, and (C) a coloring agent.

Abstract: A liquid developer for electrostatic photography comprising a carrier medium having an electrical resistivity of not less than 10.sup.9 106.cm and a dielectric constant of not more than 3.5 having dispersed therein at least a resin, wherein said resin is a copolymer resin obtained by copolymerizing (1) a solution containing at least one copolymer having an unsaturated bond obtained by copolymerizing at least one monomer (A) represented by formula (I) shown below and at least one monomer (B) represented by formula (II) shown below, and reacting the resulting copolymer with at least one monomer (C) represented by formula (III) shown below, (2) at least one monomer (D) which is soluble in the carrier medium but becomes insoluble upon polymerization, and (3) at least one monomer (E) represented by formula (IV) shown below to obtained a resin dispersion: ##STR1## wherein a.sub.1, a.sub.2 a.sub.3, b.sub.1, b.sub.2, b.sub.3, d.sub.1, d.sub.2, d.sub.3, e.sub.1, e.sub.2, e.sub.3, X, Y, V, Z, L, F, Q, G, R.sub.1, R.

Abstract: This invention provides a negative-charging liquid developer for electrostatic photography excellent in charge stability and dispersion stability which comprises a highly insulating carrier liquid in which resin particles containing a charge control agent are dispersed, said charge control agent being a carboxylic acid amine salt which comprises a polycarboxylic acid compound insoluble in said carrier liquid and a high molecular amino compound soluble in said carrier liquid.

Abstract: New electrostatographic toners and developers are provided, containing dual function polyester binder/charge agents. The new toner particle has an average diameter in the range of 0.01 to 100 micrometers and comprises a binder polyester and a charge-control agent comprising a quaternary phosphonium salt, wherein the phosphonium salt has a cationic portion comprising a phosphorus atom covalently bonded to at least one moiety containing an ester linkage to the binder polyester.

Abstract: New electrostatographic developers are provided, containing dual function polymeric binder/charge agents. The new developers contain toner particles comprising a vinyl addition binder polymer containing a quaternary phosphonium salt, wherein the phosphonium salt has an anionic portion covalently bonded to the binder polymer.

Abstract: New electrostatographic toners and developers are provided, containing dual function polyester binder/charge agents. The new toner particle has an average diameter in the range of 0.01 to 100 micrometers and comprises a binder polyester and a charge-control agent comprising a quaternary phosphonium salt, wherein the phosphonium salt has an anionic portion comprising a sulfonate group covalently bonded to a moiety containing at least one ester linkage to the binder polyester.

Abstract: Disclosed is an electrophotographic liquid developer composition comprising a liquid medium, first toner particles charged to one polarity and comprising a first dye and polymeric cores to which steric stabilizer polymers have been attached, second toner particles charged to a polarity opposite to that of the first toner particles and comprising a second dye of a different color than the first dye and polymeric cores to which steric stabilizer polymers have been attached, and a charge director. The disclosed developer is suitable for developing electrostatic latent images in two different colors in a single development step. The latent image comprises three areas of charge, toner particles of one color are selectively attracted to one area, toner particles of the other color are selectively attracted to the second area, and the third area remains undeveloped as a background area.

Abstract: The present invention relates to a liquid developer for electrostatic latent image, comprising the following components (a), (b) and (c) which are dispersed in an electrical resistive aliphatic hydrocarbon solvent:(a) a non-gel copolymer which as a whole is insoluble in the solvent and which consists essentially of a copolymer segment soluble in the solvent and a polymer segment insoluble in the solvent, the solvent-soluble copolymer segment containing as main monomer components an alkyl acrylate or an alkyl methacrylate and a cycloalkyl acrylate or a cyckloalkyl methacrylate and/or an aralkyl acrylate or an aralkyl methacrylate, and the solvent-insoluble polymer segment containing vinyl acetate as a main monomer component;(b) a coloring agent; and(c) a dispersant.

Abstract: A particulate electrophotographic toner includes a binder polymer having dispersed therein an amount, effective to control the charge on the toner particles, of a mixture of sodium dioctylsulfosuccinate and sodium benzoate.

Abstract: Disclosed is a toner composition useful for electrophotography consisting of (1) the reaction product of a polyfunctional azide and a cross-linkable toner resin that is a copolymer of a styrene material and an acrylate or methacrylate, or a polyester resin that is the reaction product of a dicarboxylic acid and a dihydric alcohol, and (2) a colorant.

Abstract: Dry toners for use in electrostatic latent image development comprising a colorant in a resin binder are described, wherein said resin binder comprises a polyester containing --COOH groups in which at least one of the --COOH groups is replaced with nitrogen-containing compounds such as amines, ammonium salts, betaines, pyridinium salts, and azines. These toners are superior in development of negatively charged latent images and exhibit good low temperature fixability.

Abstract: A toner for developing an electrostatically charged image, comprising(A) an inner layer comprising a resin ion complex having a coloring agent and optionally a charge controlling agent and/or a magnetic material substantially dispersed therein, and(B) an outer layer containing a flowability imparting agent;and a process for producing a toner for developing an electrostatically charged image, which comprises dispersing a coloring agent and optionally a charge controlling agent and/or a magnetic substance in a resin emulsion having a charge, mixing the dispersion with a resin emulsion having an opposite charge to prepare a dispersion of a resin ion complex, adding a flowability imparting agent to the dispersion, and spray-drying the resulting dispersion.

Abstract: A polyester for use as an electrophotographic toner composition is obtained by copolycondensation of (a) a diol component of polyoxyalkylene-bis(4-hydroxyphenyl)propane and (b) an acid component, improved by incorporating into the acid component a copolymer of styrene or a derivative thereof and a carboxylic vinyl monomer. A copolymer of an unsaturated aliphatic hydrocarbon and an unsaturated carboxylic acid and a polymer and copolymer of an unsaturated carboxylic acid may be used. The toner is improved in the prevention of off-set in the fixation step.

Abstract: An improved dry toner for developing latent images is disclosed which comprises essentially a resin and a magnetic powder. The resin includes, as the copolymerization components, at least one monomer selected from the group consisting of styrene and its derivatives and at least one monomer selected from the group consisting of maleic acid and its derivatives.

Abstract: An electrophotographic toner, which can exhibit good fixation in high-speed copying and is not affected by an environment such as high humidity, is provided by containing, as a principal component thereof, a resin blend composed of (a) 40-90 wt. % of a vinyl copolymer (I) formed of 70-97 wt. % of an aromatic vinyl monomer, 3-30 wt. % of an alkyl fumarate which is a C.sub.1-8 monoalkyl or dialkyl ester and 0-5 wt. % of an acid monomer and having a number average molecular weight of 2,000-15,000 and (b) 10-60 wt. % of a vinyl polymer (II) having a number average molecular weight of 20,000-500,000.