JPH0562342B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of forming a color toner image on a transparent film by electrophotography, electrostatic printing, etc. on how to improve.

Conventionally, as an electrophotographic method, U.S. Patent No. 2297691
Specification of No. 42-23910 and Special Publication No. 1973
A number of methods are known, such as those described in Japanese Patent No. 24748, but in general, an electrical latent image is formed on a photoreceptor using a photoconductive substance by various means, and then the latent image is transferred. After developing with toner and transferring the toner image to a transfer material such as paper as necessary, it is fixed by heating or pressure to obtain a copy.

Furthermore, various developing methods are known for visualizing electrical latent images using toner. For example, the magnetic brush method described in US Pat. No. 2,874,063, the cascade development method described in US Pat. No. 2,618,552, and the powder cloud method and fur brush development method described in US Pat. No. 2,221,776;
Many development methods are known, such as liquid development.

Toners used in these development methods include:
Conventionally, fine powders in which dyes and pigments are dispersed in natural or synthetic resins have been used. Furthermore, it is also known to use fine developing powder to which a third substance is added for various purposes.

The use of image forming techniques using electrophotography, electrostatic printing, etc. is rapidly expanding as modern information becomes more complex and diversified. Accordingly, the image forming technology is required to be compatible with various uses such as digitization and colorization. Among these required technologies, a copy (hereinafter referred to as a trapen copy) in which characters and images are formed using black or chromatic toner on a transparent film is printed on a white surface using an overhead projector (OHP) or the like.
Projecting onto a projection surface such as a white board is already widely practiced.

However, conventionally, when a trap copy is made using an electrophotographic copying machine or the like, even if the toner image is a chromatic color other than black, the resulting projected image is not a chromatic color but a black-gray color. This is because the toner has low transparency, or the unevenness of the toner image surface causes light to be scattered or diffusely reflected, or both, so the light from the toner image area cannot reach the projection surface, leaving the image area in the shadow. This is because it appears as.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method for producing a color travel pen copy in which a color (chromatic color) toner image is projected with clear colors.

The feature of the method for creating a color trap pen copy of the present invention is that the color toner image formed on a transparent film has a surface roughness in contact with air with a ten-point average roughness of 0.8Z based on JISB0601-1982.
The purpose is to process it so that it becomes .

As a result of intensive research, the inventors of the present invention found that the surface roughness of a trapen copy (referred to as a color trapen copy) in which a color toner image is formed on a transparent film is based on the 10-point average roughness based on JISB0601-1982.
At 0.8Z, we reached the conclusion that the unevenness of the surface of the toner image that comes into contact with the air does not have a major effect on the path of light, and the toner image can be faithfully projected with its color intact.

There are two main methods for making the toner image formed on a transparent film a smooth toner image surface with a ten-point average roughness of 0.8Z. That is, the roughness of the surface of a toner image is caused by gaps and steps between particles of a toner layer formed in the form of an image on a transparent film as a support, and by the irregular or spherical shape of the toner particles themselves. Therefore, in order to smooth the surface of a toner image, there is a method of filling the steps and gaps between toner particles with a suitable substance, a method of coating the toner layer so as not to be affected by the shape of the toner itself, and a method of applying heat or pressure. There is a method of sufficiently adhering the toner particles to each other by changing the shape of the toner particles, thereby eliminating gaps and steps between the toner particles and making the uppermost surface of the toner layer exhibit a sufficiently smooth surface.

When using the former method, it is necessary to use a coating material that does not impair the color of the toner, absorbs little light, and forms a transparent film, and preferably has a high transmittance. 70% or more is good. Specific methods include, for example, coating the toner image with a transparent lacquer or the like, pasting a transparent adhesive tape or the like over the toner image, or laminating the toner image.

The invention may be practiced by any of the methods described above.

The toner used in the present invention may be any toner that is made of a binder resin, dye, pigment, and other additives that are generally used in electrophotography and electrostatic printing, and further contains a transparent magnetic material that does not absorb light. It may also be added as a toner component.

The toner image formed on the transparent film in the present invention may be formed by a conventional electrophotographic method, electrostatic printing method, etc., but is not limited to these methods. It is fine as long as it is.

Next, examples of the present invention will be described.

[Example 1] Canon Transparency (O, H, P film) NP, which is a transparent film for OHP, was used in an electrophotographic copying machine NP color manufactured by Canon Inc.
−DRY is used as a transfer material, and the color toner image is copied onto it using 3M company 088.
When I projected the image using a portable overhead projector, I could only obtain a black-gray monochromatic image. Mylar tape (thickness: 25 μm) manufactured by Nichiban Co., Ltd. was pasted onto the above toner image to avoid air bubbles. When the color travel pen copy created in this way was projected on the above OHP,
The colors of the toner image on the film were directly obtained as the colors of the projected image. The surface roughness of the former is 30 μm with a ten-point average roughness, and that of the latter is 0.06 μm (measured with a Kosaka surface roughness meter), and the transmittance of the latter coating layer is 90% (measured with a spectrophotometer manufactured by JASCO). ).

[Example 2] On the original toner image obtained in the same manner as in Example 1, a Lutzker spray (Spray Lutzker manufactured by Nippon Paint Co., Ltd.) was applied at a distance of about 0.001 cm from the toner image.
It was applied so that it was coated uniformly to a thickness of mm or more.
(92% transmittance of transparent film). The surface roughness of the uncoated toner image was 20 μm on a ten-point average, and the projected image was a black-gray image, but that of the toner image after lacquer spray was 0.1 μm, and the projected image was colored. It was a bright, multicolored image.

[Example 3] When a color trapen copy of the original obtained in the same manner as in Example 1 was projected, the image was grayish. This trap-pen copy was passed through an external heat fixing roller (set temperature 145°C ± 5°C, pressure 15 kg/cm ² ) twice at a rotation speed of 1/3 of the rotation speed of the fixing roller of the original copying machine. When I projected it, it turned out to be a colored projection image. The surface roughness of the former is the ten-point average roughness.
35 μm, and that of the latter was 0.7 μm.

[Example 4] When a color trapen copy of the original obtained in the same manner as in Example 1 was projected, the image was grayish. This film was laminated using a laminated film (polyester + polyethylene) using Nisshin Kogyo's Laminex type 25 (transmittance 90).
%) As a result, the color of the toner image on the OHP film could be directly projected as a projected image. The surface roughness of the former is 31 μm, with a ten-point average roughness of 31 μm.
The latter had a ten-point average roughness of 0.2 μm.

As described above, according to the present invention, it is possible to obtain a color travel pen copy that exhibits faithful and clear colors when projected using OHP.

Claims (1)

[Scope of Claims] 1. A color product characterized in that a color toner image formed on a transparent film is subjected to a process to make its surface roughness a ten-point average roughness of 0.8Z based on JIS B0601-1982. How to create a Trapen copy. 2. The method of claim 1, wherein said processing comprises covering said color toner image with a transparent coating. 3. The above processing comprises applying heat or pressure to the color toner image.
How to make a color trap pen copy of the section.