SU459903A3 - The method of obtaining color electrophotographic material mosaic structure - Google Patents

Description

To make a color electrophotographic material of a mosaic structure, some parts of which are sensitive to only one of the three spectral zones, two patterns can be used, which are a light-transparent base with a series of light-opaque lines of equal width. The lines on the first pattern usually occupy a third of its area, and on the second - half. The exposure through the second pattern is carried out in such a way that the lines of the second pattern intersect at a certain angle, preferably straight, with the lines of the first pattern. The second pattern may contain lines that are opaque to light of such a wavelength, which senses the photoconductor, but transmits light of such a wavelength to which some areas of the photoconductor were previously sensitized. Thus, when exposed to white light through a template of the specified type, the entire photoconductor layer is exposed to light from those regions of the spectrum to which it is sensitive. As a rule, insensitive photoconductor is sensitive only to ultraviolet light. If lines that are opaque to yellow light are applied to one of the templates, and some areas of the photoconductor surface are sensitive to red light, then when exposed through the template with ultraviolet light, the electric charge disappears only on those areas that are covered by the template lines. The distance between the lines on the template depends on the resolution, as a rule, there are 100-300 lines per 25.4 mm. To obtain a color electrophotographic material of a mosaic structure, each of the individual areas of which is sensitive to only one of the four spectral zones, the spectrally insensitive electrophotographic material is usually charged, exposed to light of such a wavelength to which the non-sensitized photoconductor is sensitive, through a template containing a series of opaque lines for light of this wavelength and deposited on a light transparent base, tint the remaining charged surface of the photoconductor ik by a substance sensitizing them to the light of a single band of the spectrum, recharge the material, expose it to the total exposure to the light of the spectrum to which some areas of the material have just been sensitized, before, simultaneously to or after the general exposure, sensate the material waves through a pattern with a series of lines that are opaque to the light of this wavelength, are applied on a transparent for light basis and intersect at an angle of 60 ° with the lines of the first pattern, tint the material By sensitizing the remaining charged surface areas of the photoconductor to the light of the other spectral zone, recharge and expose to the total exposure with light including both spectral regions to which some areas of the material were sensitized, simultaneously or after a general exposure, expose the material with light of such a wavelength to which is sensitive to a non-sensitized photoconductor, through a template containing a series of lines that are not opaque to light of the specified wavelength, are applied to the light transparent again and placed at an angle of 60 ° to the lines of the first and second patterns, are tinted with a substance sensing the remaining charged surface areas of the photoconductor to the light of the third zone of the spectrum, reload the material and carry out a general exposure to light that includes all three zones of the spectrum. Some areas of the material were sensitized, and tinted by a substance sensitizing the remaining charged areas of the photoconductor surface to the fourth zone of the spectrum. The width of the lines on the template can be the same or different, which allows to obtain separate mosaic sections of equal or different area. For example, the area occupied by the lines in the first, second and third patterns should be a quarter, a third and a half of the pattern area, respectively. Zinc oxide is used as a photoconductor in bonding or other organic and inorganic substances. Sensitizers can be used in powder, aerosol or dispersion form. FIG. 1--7 depict the stages of manufacturing a color electrophotographic material of a mosaic structure, with FIG. 1 to 3 depict the stages of manufacturing a material having three sections, each of which is sensitive to one of the three zones of the spectrum, and FIG. 4--7 are the stages of manufacturing a material containing four sections, each of which is sensitive to one of the four zones of the spectrum. For the manufacture of an electrophotographic material, a suspension of 12 wt. including zinc oxide in a solution of 1 wt. the E87-09 resins in toluene, dried, charged the paper negatively (8 kV, corona discharge) and exposed for 30 seconds through a glass sheet, one third of the area of which was covered with opaque black lines, spaced at equal distance from each other. (300 lines per 25.4 mm) at a distance of 05 mm by a tungsten lamp (48 W, 2830 ° K). After exposure, the material is placed in minutes in a toner prepared from 1.0 g of Patent lueV, sensitized zinc oxide, 025 g of ferrostearate, 2.0 g of itchalos 7il5 alkyd resin and 250 mg of Isoper G, dried and the material is taught (see FIG. 1) containing

sections 1 and 2 are spectrally insensitive and sensitive to the red zone of the spectrum, respectively. On close observation, clear blue lines are noticeable.

This material is negatively charged (up to 8 KB, corona discharge), expelled at a distance of 305 mm with a tungsten lamp (UOW) behind a red filter (Ilford 204) and exposed for 30 seconds through a second glass template, half of which is covered with opaque lines (300 lines pa 25.4 mm), at a distance of 305 mm tungsten lamp (48 W, 2850 ° K) -. The lines on the second pattern are perpendicular to the lines of the first pattern. Then the material is sensitized with a composition similar to the previous one, but containing zinc oxide, which is sensitized with a red dye.

On photographic material, areas 3 are formed, which are sensed to the green zone of the spectrum. After drying, the material is again negatively charged (up to 8 kV, corona discharge), exposed at a distance of 305 mm with a tungsten lamp (100 W) behind a yellow filter (Ilford PO) and sensitized with a composition similar to the one mentioned above, but containing zinc oxide, sensible Auramine 0.

The color electrophotographic material produced contains sections 4 sensible to the blue zone of the spectrum. Color electrophotographic material was made without careful installation of templates.

Depicted in FIG. 4-7, the electrophotographic material contains spectrally insensitive areas 5 and areas 6 that are sensory-blind when exposed through a template containing a series of opaque lippies of the same width on a light-transparent base. The area occupied by the lines is one quarter of the area of the pattern.

The areas 7 sensitized by another substance are obtained after exposure through a template similar to the first, but the lines of which are at an angle of 60 ° to the lines of the first template.

After exposure and sensitization, the material contains groups of parallelograms (see Fig. 5). In order for the final material to contain four groups of mosaic plots of the same area, it is necessary to determine the angle at which the third template should be located and the distance between the lines on the third pattern relative to the dimensions of the indicated parallelograms. If the large diagonal of the parallelograms is taken as a unit of length, then the distance between the lines on the third pattern should be about two lines per unit of length. The third pattern is set in the direction parallel to the smaller diagonal of the parallelogram.

FIG. Figure 6 shows the material after the indicated exposure and the completion of the sensitization stage with a third sensitizing substance with sections 8 occupying half the area of each parallelogram and one quarter of the total surface area of the material.

After completion of the charging and sensitization stages, a material is obtained (sy. Fig. 7) with sections 6–9 sensitized with four different substances.

In the manufacture of the material shown in FIG. 4-7, the same sensitizing compositions are used as in the manufacture of the material shown in FIG. 1-3.

Subject invention

15

Claims (3)

1. A method for producing a color electrophotographic material of a mosaic structure, each of the individual portions of which is sensitive to only one region of the spectrum from three, of a spectrally insensitive electrophotographic material, characterized in that, in order to obtain a material of a mosaic structure, each of the individual portions of which is sensitive only to one of the three spectral zones, without exact positioning of the template, the spectrally insensitive electrophotographic material is charged, exposed to light of the wavelength to which the photoconductor is sensitive, through a template with a series of lines opaque to the light of the specified wavelength and applied to the light-transparent substrate. the remaining charged surface areas of the photoconductor with a substance sensitizing them to the light of one zone of the spectrum, recharge the material, expose it to the total exposure to the light of that zone with the spectra to which some of its parts were sensitized, prior to the general exposure, simultaneously or after it, the material was sensed by exposing it with light of a certain wavelength through a pattern containing a series of lines printed on a light transparent substrate that are opaque to light of the specified wavelength and intersect at an angle with the lines of the first pattern, tinted with a substance sensitizing the remaining charged surface areas of the photoconductor to the light of another spectral zone, reloading the material, exposing it to the total light with both regions of the spectrum to which some areas of the electrophotographic the material was sensitized and tinted with a substance sensitizing the remaining charged surface of the photoconductor to the third zone of the spectrum. 2. A method according to claim 1, characterized in that the exposure through the second template is carried out in such a way that the lines of the second template intersect at a right angle with the lines of the first template. 3. The method according to claim 1, characterized in that, in order to obtain a color electrophotographic material of a mosaic structure, each of the individual portions of which is sensitive to only one of four spectral zones, the spectrally insensitive electrophotographic material is charged, exposed to light of such a wavelength to which the photoconductor is sensitive, through a template with a series of lines that are opaque to light of a specified wavelength and are applied to a transparent light basis, tint the remaining charged surface areas of the photovoltage They are recharged to the light of one zone of the spectrum, they are recharged, subjected to general exposure to the light of the spectral region to which some of its parts have just been sensitized, before, simultaneously or after exposure: they expose the material, exposing its light of a certain wavelength is tinted through a pattern containing a series of lines drawn onto a transparent light for a substrate, which are opaque to light of a specified wavelength and intersect at a 60 ° angle with the lines of the first pattern material, sensitized, im the remaining charged surface areas of the photoconductor to the light of another part of the spectrum are recharged, exposed to the surface, exposed to light containing both areas of the spectrum to which some areas of the material have been sensitized, simultaneously or after a general exposure to the material exposed to light of a wavelength to which it is sensitive a non-sensitized photoconductor, through a template with a series of lines applied onto a transparent for light basis, which are opaque to light of a specified wavelength and located at an angle m 60 ° to the lines of the first and second templates, tint the material with a substance sensing the remaining charged surface areas of the photoconductor to the light of the third zone of the spectrum, recharge, expose the total exposure with light including All three zones of the spectrum, to which some areas of the material were sensitized, are tinted with a substance that sensitizes the remaining charged areas of the photoconductor surface to the fourth zone of the spectrum. -% l FIG. i BUT V, X 2 9ig 3