JP2000356862A - Electrophotographic recording material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an electrophotographic recording material having characteristics peculiar to photographic printing paper and giving image quality comparable to that of a photograph, in particular image quality excellent in gloss by disposing a layer containing microvoids between a substrate and a toner image receiving layer. SOLUTION: The electrophotographic recording material has a toner image receiving layer on the substrate and a layer containing microvoids between the substrate and the toner image receiving layer. In the microvoids, a solid or liquid material constituting the layer is not present. A gas may exist in the microvoids. The shape of the microvoids is ideally a convex lens shape, that is, a shape formed between two piled concave lenses. The major axial direction of the microvoids is preferably parallel to the surface of the electrophotographic recording material. The microvoids are usually closed cells and pores that a gas or liquid passes through the layer containing the microvoids are not substantially present.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a recording material for electrophotography. In particular, it relates to a recording material for electrophotography capable of forming a glossy and clear image.

[0002]

2. Description of the Related Art Electrophotography is an image forming method utilizing a photoconductive effect and an electrostatic phenomenon, and is widely used in various fields. An image formed by electrophotography may be formed on a semiconductor material itself such as zinc oxide paper, or may be formed by transferring a toner image from a semiconductor material to a recording material capable of receiving a toner image. The latter xerography method is widely used in office copying machines and the like, and its image forming principle is as follows.

First, a photosensitive plate using a photoconductor such as selenium is given an electrostatic charge by corona discharge or the like in a dark place.
When this is exposed corresponding to the original image, the charge changes only where the light hits, and a latent image is formed. When the charged toner is sprayed on the carrier and introduced, the toner adheres in an image form. An image is formed by applying a recording material from above and transferring the toner to the recording material, and fixing the toner by heat or the like.

[0004] In recent years, color copiers that have become more widespread use the above method using colored toner.
Color copying machines are often used to copy images rather than characters, and the images formed are required to be clear and of high quality. However, it is not possible to form a clear, high-quality image even when performing color copying using plain paper. For this reason, it has been required to improve the recording material.

US Pat. No. 5,112,717 describes a method for forming an image having a quality near that of a photographic paper. This recording material is obtained by coating polystyrene on the surface of a support made of core paper or base paper, and describes that the back surface is preferably made of polyolefin. However, a recording material having such a pure plastic layer on both sides cannot provide a tactile sensation like photographic paper. In addition, characteristics such as whiteness, antistatic characteristics, and writing characteristics on the back surface are not sufficient.

In order to provide a glossy image like a photograph, it is preferable to use a support coated with a polyolefin or the like, provided with a receiving layer. Further, it is preferable to use the toner by dissolving it in the receptor layer at a high temperature. However, the polyolefin-coated paper does not easily become hot at the time of fixing and does not have high gloss. On the other hand, JP-A-5-246153 describes a dye-receiving element for thermal die transfer having a layer containing microvoids. But,
No mention is made of electrophotographic records.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems relating to a recording material for electrophotography. That is, an object of the present invention is to provide a recording material for electrophotography, which has the characteristics of photographic printing paper and gives an image quality equivalent to that of a photograph, in particular, a quality excellent in gloss. .

[0008]

As a result of intensive studies to solve these problems, the present inventors have found that by forming a layer containing microvoids between the support and the toner image receiving layer, The present inventors have found that an excellent electrophotographic recording material having the desired effect can be obtained, and have reached the present invention. That is, the present invention provides an electrophotographic recording material having a toner image receiving layer on a support, wherein the electrophotographic recording material has a layer containing microvoids between the support and the receiving layer. Materials.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The recording material for electrophotography of the present invention will be described below in detail. The shape of the recording material for electrophotography of the present invention is not particularly limited as long as recording can be performed by electrophotography. Preferred is a sheet-like recording material for electrophotography.

The support of the electrophotographic recording material of the present invention is required in terms of smoothness, whiteness, slipperiness, friction, antistatic property, dent after fixing, etc., which can withstand the fixing temperature. Any material can be used as long as it satisfies. In general, edited by The Photographic Society of Japan, "Basics of Photographic Engineering-Silver salt photography-", published by Corona Co., Ltd. (Showa 54) (223)
And photographic supports such as papers and synthetic polymers (films) described on pages (-) to (240). Specifically, it is made from synthetic resin pulp such as synthetic paper (polyolefin-based or polystyrene-based synthetic paper), high-quality paper, art paper, (double-sided) coated paper, (double-sided) cast-coated paper, polyethylene, etc., and natural pulp. Mixed paper, Yankee paper, baryta paper, wallpaper, backing paper, synthetic resin or emulsion impregnated paper, synthetic rubber latex impregnated paper, synthetic resin internal paper, paperboard, cellulose fiber paper, polyolefin coated paper (especially coated on both sides with polyethylene) Paper), various plastic films such as polyolefin, polyvinyl chloride, polyethylene terephthalate, polystyrene methacrylate, polyethylene naphthalate, polycarbonate polyvinyl chloride, polystyrene, polypropylene, polyimide, and celluloses (for example, triacetyl cellulose). Treatment to impart white reflection properties to the sheet and the plastic (e.g.,
For example, a film or sheet, cloth, metal, glass, or the like which has been subjected to a treatment such as adding a pigment such as titanium oxide to the film is used. These can be used alone or can be used as a support laminated on one or both sides with a synthetic polymer such as polyethylene. Also, a laminate of any combination of the above-mentioned supports can be used. In addition, Japanese Patent Application Laid-Open No. 62-253,159
JP-A-29-31, JP-A-1-61,236 (1
4) to (17), JP-A-63-316,848, JP-A-2-22,651, JP-A-3-56,955, and U.S. Pat. No. 5,001,033. Support can be used.

Among them, papermaking from pulp stock and JIS
Those having a density specified by P8118 of 0.90 g / cm ³ or more are preferable. Examples of the pulp stock include hardwood bleached kraft pulp (LBKP), softwood bleached kraft pulp (NBKP), and hardwood sulphite pulp (LB).
SP) and the like. These may be used alone or in combination of two or more. Pulp paper materials
Those having a weight average fiber length after beating of 0.45 to 0.65 mm are preferable, and those having a weight average fiber length of 0.50 to 0.60 mm are particularly preferable.

In the present invention, a support such as the above-mentioned pulp stock (also referred to as “pulp slurry”),
If necessary, various additives, for example, filler, dry paper strength agent, sizing agent, wet paper strength agent, fixing agent, pH adjuster,
Other drugs and the like can be added. As the filler, for example, calcium carbonate, clay, kaolin,
Examples include clay, talc, titanium oxide, diatomaceous earth, barium sulfate, aluminum hydroxide, magnesium hydroxide and the like.

The above-mentioned dry paper strength enhancer includes, for example,
Examples include cationized starch, cationized polyacrylamide, anionized polyacrylamide, carboxy-modified polyvinyl alcohol, and the like. As the sizing agent,
For example, fatty acid salts, rosin, rosin derivatives such as maleated rosin, paraffin wax, alkyl ketene dimer, alkenyl succinic anhydride (ASA) and the like can be mentioned.

As the wet paper strength enhancer, for example,
Examples thereof include polyamine polyamide epichlorohydrin, melamine resin, urea resin, and epoxidized polyamide resin. Examples of the fixing agent include polyvalent metal salts such as aluminum sulfate and aluminum chloride, and cationic polymers such as cationized starch. Examples of the pH adjuster include caustic soda and sodium carbonate. Examples of the other agents include an antifoaming agent, a dye, a pigment, a slime control agent, a fluorescent brightener, a softening agent, and a conductive agent.

The thickness of these supports is usually from 25 μm to
300 μm, more preferably 50 μm to 260 μm
And more preferably about 75 μm to 220 μm.
Various rigidities can be used according to the purpose, but for a photographic quality image-receiving paper, a material close to a support for a color silver halide photograph is preferably used. The same applies to the smoothness. From the viewpoint of fixing performance, the thermal conductivity of the paper under the conditions of 20 ° C. and a relative humidity of 65% is 0.50 kcal / m · m.
It is preferably at least h.degree. Thermal conductivity is JIS
Transfer paper conditioned in accordance with P 8111 is disclosed in
It can be measured by the method described in -66279. In addition, the density of the support is preferably 0.7 g / cm ³ or more from the above viewpoint.

One or both surfaces of these supports can be subjected to various surface treatments or undercoats for the purpose of improving the adhesion to a layer provided thereon. As the surface treatment, for example, a glossy surface or JP-A-55-26507
JP-A No. 2000-216, and the activation treatment such as corona discharge treatment, flame treatment, glow discharge treatment, or plasma treatment. As the undercoat, for example, a method described in JP-A-61-846443 can be used. In addition, these may be used alone, or may be subjected to activation treatment after performing molding or the like, or may be used in combination in any combination, such as performing undercoating after surface treatment such as activation treatment. it can. During the construction of these supports and the front and back surfaces, and in combinations thereof, a semiconductive metal oxide such as a hydrophilic binder and alumina sol or tin oxide,
Carbon black or another antistatic agent may be applied. Specifically, supports described in JP-A-63-220,246 can be used.

As the support used in the electrophotographic recording material of the present invention, one obtained by coating one or both sides of the pulp stock with a polyolefin resin is preferable. The coating layer of the polyolerin resin may have a single-layer structure,
It may have a laminated structure composed of layers or more. As the polyolefin resin used for the coating layer, 170 to 345
It can be appropriately selected from those which can be melt-extruded at a temperature of ° C, and examples thereof include homopolymers of α-olefins such as polyethylene, polypropylene, and polybutene, and mixtures thereof. Among these,
Polyethylene is preferred in terms of suitability for melt extrusion and cost.

The above polyethylene has a density of 0.
940~0.970g / cm ³ at a high density polyethylene (HDPE), low density polyethylene which is a 0.910~0.930g / cm ³ (LDPE), linear low density polyethylene (L-LDPE) any such However, when importance is placed on the rigidity of the recording sheet, it is preferable to use polypropylene, the high-density polyethylene (HDPE), linear low-density polyethylene (L-LDPE), a mixture thereof, or the like. The polyethylene preferably has a melt index of about 0.1 to 30 g / 10 minutes.

As the support of the recording material for electrophotography of the present invention, the above-mentioned pulp stock is subjected to an activation treatment such as a corona discharge treatment, a flame treatment, a glow discharge treatment or a plasma treatment. It is preferable that the polyolefin resin is coated on both sides of a pulp stock. When the coating layer is formed as a single layer, the thickness of the coating layer of the polyolefin resin is usually about 5 to 60 μm, and preferably 15 to 30 μm.

The recording material for electrophotography of the present invention is provided with a single layer or a laminated receiving layer for receiving color and black toners and forming an image, that is, an image receiving layer, on a support. The thickness of the receiving layer is preferably at least の of the particle size of the toner, and more preferably 1% of the toner particle size.
It is twice to three times as thick. Specifically, 0.5 to 50 μm
Degree, preferably 2 to 20 μm. As the receiving layer, JP-A-5-216322 and JP-A-7-301
The thickness disclosed in Japanese Patent No. 939 is preferable.

The receiving layer of the recording material for electrophotography of the present invention comprises a polymer capable of dissolving the toner, and is preferably a thermoplastic resin. Specifically, a resin having an ester bond; a polyurethane resin; a polyamide resin such as a urea resin; a polysulfone resin; a polyvinyl chloride resin, a polyvinylidene chloride resin, and a vinyl chloride resin.
Vinyl acetate copolymer resin, vinyl chloride-vinyl propionate copolymer resin; polyol resin such as polyvinyl butyral, cellulose resin such as ethyl cellulose resin, cellulose acetate resin; polycaprolactone resin, styrene-maleic anhydride resin, polyacrylonitrile resin And polyether resins, epoxy resins, and phenol resins; polyolefin resins such as polyethylene resins and polypropylene resins; copolymer resins of olefins such as ethylene and propylene with other vinyl monomers; and acrylic resins. These polymers may be used alone, or two or more may be used in combination as a mixture or a copolymer.

Among the above polymers, those similar to the binder polymer of the toner are preferable. When the binder of the toner is polyester, a resin having an ester bond is preferable. The resin having an ester bond may be a resin obtained by synthesis, or a commercially available product may be used as it is. Specifically, dicarboxylic acid components such as terephthalic acid, isophthalic acid, maleic acid, fumaric acid, phthalic acid, adipic acid, sebacic acid, azelaic acid, abietic acid, and succinic acid (these dicarboxylic acid components include sulfonic acid groups) , Carboxyl group etc. may be substituted)
And alcohol components such as ethylene glycol, diethylene glycol, propylene glycol, bisphenol A, bisphenol S, 2-ethylcyclohexyl dimethanol, and neopentyl glycol (these alcohol components may be substituted with a hydroxyl group or the like). Resin, polymethyl methacrylate, polybutyl methacrylate, polymethyl acrylate, polyacrylate resin such as polybutyl acrylate or polymethacrylate resin, polycarbonate resin, polyvinyl acetate resin, styrene acrylate resin, styrene-methacryl Acid ester copolymer resin, vinyl toluene acrylate resin and the like can be exemplified. More specifically, JP-A-59-101
395, JP-A-63-7971, JP-A-63-7971
No. 72, JP-A-63-7973, JP-A-60-294
No. 862 can be mentioned. Commercial products include Toyobo Byron 200,
Byron 103, Byron 300, Byron 500, Byron 280, Byron 290, Toray's Chemit K-1
089, Chemit K-1294, Chemit R-70, Chemit R-80, Unitika Elitel UE3400,
Elitel UE-3221, Elytel UE-321
0, Elitel UE-3200, Nippon Synthetic Chemical Industry's Polyester TP220, Polyester TP290, Polyester HP320, Polyester SP-13L, Kao's ATR-2009, ATR-2010, Tufton NE
382 and the like.

The receiving layer of the electrophotographic recording material of the present invention can be formed by dissolving the above-mentioned polymer in an organic solvent or dispersing it in water as an emulsified dispersion, coating the mixture on a support and drying. it can. Alternatively, the polymer may be melted and formed on a support by extrusion lamination. The receiving layer of the electrophotographic recording material of the present invention may contain a filler. Examples of the filler include calcium carbonate, clay, kaolin, clay, talc, titanium oxide, diatomaceous earth, barium sulfate, aluminum hydroxide, and magnesium hydroxide. Titanium oxide is preferred for increasing whiteness.

The physical properties of the receiving layer of the electrophotographic recording material of the present invention preferably satisfy one or more of the following items, more preferably a plurality of items, and most preferably all of the following items. is there. (1) Tg (glass transition temperature) of the receiving layer is 30 ° C. or more,
Tg of toner + 20 ° C or less. (2) T1 / 2 (1/2 method softening point) of the receiving layer is from 60 ° C to 150 ° C, preferably from 80 ° C to 120 ° C. (3) Tfb (outflow starting temperature) of the receiving layer is 40 ° C. or more and 1
00 ° C. or lower, preferably Tfb of the toner + 10 ° C. or lower. (4) The temperature at which the viscosity of the receiving layer becomes 1 × 10 ⁵ CP is 40.
C. or higher and lower than the temperature at which the viscosity of the toner becomes 1 × 10 ⁵ CP. (5) The storage elastic modulus (G ′) at the fixing temperature of the receiving layer is 1 × 10 ² Pa or more and 1 × 10 ⁵ Pa or less, and the loss elastic modulus (G ″) is 1 × 10 ² Pa or more, × 10 ⁵ Pa
Must be: (6) Loss tangent (G "/ G), which is the ratio of the loss modulus (G") to the storage modulus (G ') at the fixing temperature of the receiving layer.
G ′) is 0.01 or more and 10 or less. (7) The storage elastic modulus (G ') at the fixing temperature of the receiving layer is-with respect to the storage elastic modulus (G ") at the fixing temperature of the toner.
50 or more and +2500 or less. (8) The inclination angle of the molten toner on the receiving layer is 50 degrees or less, particularly 40 degrees or less. Further, as the receiving layer, Japanese Patent No. 2788358,
JP-A-7-248637, JP-A-8-30506
No. 7 which satisfies the physical properties and the like disclosed in JP-A-10-239889 and the like are preferable.

The physical properties (1) can be measured by a differential scanning calorimeter (DSC). (2)-
The physical properties of (4) are, for example, flow tester C manufactured by Shimadzu Corporation.
It can be measured using FT-500. (5)-
The physical properties of (7) can be measured using a rotary rheometer (for example, a dynamic analyzer RADII manufactured by Rheometric Corporation). The physical properties of (8) were measured using a contact angle measurement device manufactured by Kyowa Interface Chemical Co., Ltd.
916 can be measured.

In the electrophotographic recording material of the present invention, the surface resistance of the surface of the receiving layer is preferably from 10 ⁶ Ω / cm ^{2 to} 10 ¹² Ω / cm ² . Particularly preferably, 10 ⁹ Ω / cm ²
It is as follows. When the surface resistance is 10 ¹² Ω / cm ² or more, the adhesion of the toner is rapidly deteriorated, and when the surface resistance is 10 ⁶ Ω / cm ² or less, only an image without gradation tends to be obtained. In order to reduce the surface resistance to 10 ¹² Ω / cm ² or less, it is necessary to use an anionic or cationic substance, particularly an anionic surfactant, a cationic surfactant or an amphoteric surfactant in an electrophotographic recording material. it can.

The electrophotographic recording material of the present invention comprises a surface protective layer, an intermediate layer, an undercoat layer, a cushion layer, a charge control (prevention) layer, a reflective layer, a color control layer, and a storability improving layer, in addition to the receptor layer. , An anti-adhesion layer, an anti-curl layer, a smoothing layer, and the like. Each layer may be a laminate of two or more layers. When the recording material for electrophotography of the present invention is a transmission type recording material in which a receiving layer or the like is provided on a transparent support, each layer on the support is preferably transparent. In the case of a reflective recording material in which a receiving layer or the like is provided on a reflective support,
Each layer on the support need not be transparent, but is preferably white. JIS P812 as whiteness
It is preferably 85% or more when measured by the method specified in 3. Further, the spectral reflectance is 8 in the wavelength range of 440 nm to 640 nm.
It is preferable that the difference between the maximum spectral reflectance and the minimum spectral reflectance in the same wavelength range is 5% or more and 5% or less. Moreover,
85% spectral reflectance in the wavelength range of 400 nm to 700 nm
As described above, it is more preferable that the difference between the maximum spectral reflectance and the minimum spectral reflectance in the same wavelength region is within 5%.

The recording material for electrophotography of the present invention is characterized in that a layer containing microvoids is provided between the support and the receiving layer. As used herein, the term “void” means a void in which a solid or liquid substance constituting a layer does not exist, and a gas may exist in the void. The shape of the microvoids is ideally a convex lens type, in other words, a shape formed between the lenses when two concave lenses are stacked. The microvoids preferably have the diameter direction of the convex lens, that is, the major axis direction of the microvoids, oriented horizontally with the surface of the electrophotographic recording material. Microvoids are usually closed cells, with substantially no pores allowing gas or liquid to pass through the layer containing the microvoids.

The method for forming microvoids is not particularly limited. Usually, the void-forming initiator (void-initiator)
It can be formed by extruding a material to which an ating material is added and stretching. At this time, the layer having microvoids and another layer may be simultaneously extruded and stretched. The stretching may be uniaxial stretching or biaxial stretching, but it is preferable to employ biaxial stretching. Extrusion and stretching form microvoids around the voiding initiator. Another microvoiding method is disclosed in U.S. Pat.
No. 7,616 can also be used.

The substrate of the layer containing the microvoids is mainly a polymer. The void formation initiator can be selected from a wide variety of substances, and preferably comprises a polymeric material. The addition amount of the void formation initiator is about 5 to 50 with respect to the weight of the substrate.
% By weight is preferred. When a polymer material is used as the void formation initiator, the polymer material is melt-mixed with the polymer of the base material of the layer, and the mixture is cooled to obtain a layer in which dispersed spherical particles are formed. Specific examples include nylon dispersed in polypropylene, polybutylene terephthalate dispersed in polypropylene, and polypropylene dispersed in polybutylene terephthalate.

It is preferable that the size and shape of the particles of the void formation initiator to be mixed into the base polymer are appropriately determined according to the microvoids to be formed. The diameter of the void-forming initiator particles is preferably from 0.1 to 10 μm, and the shape is preferably a hollow or solid sphere. The spherical void-forming initiator particles can be obtained, for example, by crosslinking a compound having a vinyl group.

The thickness of the layer containing microvoids is 10 to 3
00 μm, more preferably 15 μm.
0 to 250 μm. The thickness of the layer containing microvoids is 15 to 95 times the total thickness of the electrophotographic recording material of the present invention.
%, More preferably 30 to 85%.
%. The density of the layer containing microvoids should be between 0.2 and
Is preferably 1.0 g / cm ^3, more preferably from 0.3 to 0.7 g / cm ^3.

When the thickness of the layer containing microvoids is less than 30% or the density is more than 0.7 g / cm ³ , the compressibility and heat insulation of the layer containing microvoids decrease.
If the thickness of the layer containing microvoids is greater than 85%,
Alternatively, if the density is less than 0.3 g / cm ³ , the layer containing microvoids has a low tensile strength, low workability, and is susceptible to physical damage.

The layer containing microvoids can be laminated on the above support by means such as lamination. Further, a polymer layer containing no microvoids may be provided between the support and the layer containing microvoids. It is preferable to provide a polymer layer made of polyolefin or the like on the side of the support opposite to the receiving layer.

[0035]

The present invention will be described more specifically with reference to the following examples. The materials, amounts used, operations, and the like shown in the following examples can be appropriately changed without departing from the spirit of the present invention. Therefore, the scope of the present invention is not limited to the specific embodiments described below. (Example 1) Microvoids were formed on a surface and a back surface of a high-quality paper (OK high-quality paper manufactured by Oji Paper Co., Ltd.) having a weight of 120 g and formed with microvoids using polybutylene terephthalate as a pore-inducing substance, and had a density of 0 μm. A 0.62 g / cm ³ polypropylene sheet was bonded using an adhesive. Using a Mayer bar, a coating liquid for a toner receiving layer having the following composition was applied to the surface of the obtained composite material to prepare a recording material-1. The thickness of the receiving layer was 10 μm.

Composition of Coating Solution for Toner Receiving Layer 100 g of polyester resin (manufactured by Taftore US Kao) 400 g of methyl ethyl ketone
W3310 (manufactured by Fuji Xerox) and an image from a computer was printed. The obtained recording was glossy and sharp from low density to high density.

Example 2 A high-density polyethylene (MI = 10) containing 8% by weight of rutile-type titanium dioxide was placed on the back side of a high-quality paper weighing 120 g (OK fine paper manufactured by Oji Paper Co., Ltd.).
g / 10 min, density 0.950 g / cm ³ ) by an extrusion coating method (310 ° C.) and a thickness of 0.030 g.
mm of titanium dioxide-containing backside polyethylene layer was formed.

Next, a high-density polyethylene (MI = 8 g / 10 minutes, density 0.950 g / c)
Extrusion coating of 1/1 (weight ratio) blend (containing 10% by weight of anatase type titanium dioxide) of m ³ ) and low density polyethylene (MI = 7 g / 10 min, density 0.923 g / cm ³ ) Extrusion was carried out in the same manner by the method to form a titanium dioxide-containing surface polyethylene layer having a thickness of 0.030 mm. Further, the polypropylene sheet used in Example 1 was bonded to the surface side of the polyethylene layer. A recording material-2 was prepared by providing the same toner receiving layer as in Example 1 on the surface of the obtained composite material. An image was printed using a color laser printer in the same manner as in Example 1. The resulting record was glossy and clear.

(Comparative Example 1) Using the polyethylene-coated material obtained in Example 2 as a support, a toner receiving layer similar to that of Example 1 was provided directly on the surface polyethylene layer. Created. When printing was carried out in the same manner as in Example 1, the obtained recording was low in gloss at the intermediate density portion, and only an unclear image with insufficient image density was obtained.

Example 3 On the surface of the high-quality paper used in Example 1, a polypropylene sheet containing a microvoid filled with titanium oxide (thickness 27 μm, density 0.76 g /
cm ³ ). The same polyethylene layer as in Example 2 was provided on the back surface. The same toner receiving layer as in Example 1 was provided on the surface on the side of the microvoid-containing layer, and recording material-3 was prepared. An image was printed using a color laser printer in the same manner as in Example 1. The resulting record was glossy and clear.

[0041]

According to the recording material for electrophotography of the present invention,
A glossy and clear image can be formed. Therefore, the present invention can be widely used for recording by electrophotography.

Claims (1)

[Claims] 1. An electrophotographic recording material having a toner image receiving layer on a support, comprising a layer containing microvoids between the support and the receiving layer. Wood.