JPS61156163A - Developing material for two color electrophotography - Google Patents
Developing material for two color electrophotographyInfo
- Publication number
- JPS61156163A JPS61156163A JP59274387A JP27438784A JPS61156163A JP S61156163 A JPS61156163 A JP S61156163A JP 59274387 A JP59274387 A JP 59274387A JP 27438784 A JP27438784 A JP 27438784A JP S61156163 A JPS61156163 A JP S61156163A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- potential
- exposure
- development
- color
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G13/00—Electrographic processes using a charge pattern
- G03G13/01—Electrographic processes using a charge pattern for multicoloured copies
- G03G13/013—Electrographic processes using a charge pattern for multicoloured copies characterised by the developing step, e.g. the properties of the colour developers
Abstract
Description
【発明の詳細な説明】
（イ） 産業上の利用分野
この発明は電子写真、特に複数のイメージを１個のドラ
ムあるいはベルト状の感光体で露光、現像して紙等の被
転写材に転写する２色電子写真用の現像材料に関するも
ので、例えば特願昭５９−１０７４６３に例示される２
色の電子写真に用いるものである。DETAILED DESCRIPTION OF THE INVENTION (a) Industrial application field This invention relates to electrophotography, in particular, to exposing and developing a plurality of images on a single drum or belt-like photoreceptor and transferring them to a transfer material such as paper. It relates to a developing material for two-color electrophotography, for example, 2 exemplified in Japanese Patent Application No. 59-107463
It is used for color electrophotography.
（ロ） 従来技術
従来の単色の電子写真に用いられるトナーの体積抵抗値
はＩ Ｘ １０ ”Ωα−９，９Ｘ１０１５Ωαの範囲
内にあり、露光されていないバック部に対するイメージ
露光部の電位を感光体上で５００ｖ以上にとって現像を
行っていた。しかしながら、２色電子写真においては、
第１図から第３図に示すように、第１トナーの吸着部の
感光体上の電位を■Ａ （たとえば６００Ｖ）とし、全
面露光前のバック部の電位を■、とし、全面露光前の第
２トナーの吸着部の電位を■。とじたとき、第１トナー
の現像後に、全面露光を行って感光体の極性を逆極性に
する必要があり、この操作によってバック部の電位をＶ
、（たとえば−１５０Ｖ）からＶ８２（たとえば４５０
Ｖ）まで高めて、全面露光後の第２トナーの吸着部の電
位Ｖ。２（たとえば−１７０ｖ）と全面露光後のバック
部の電位ＶＢ２との差を６００ｖ以上にしようとすると
、第２トナーの現像の際に第１トナーが飛ばされるとい
う不具合が生じる。この原因は第１トナ一部の電位ｖＡ
と全面露光後のバック部の電位ｖＢ２との差（この場合
Ｏｖ）が無いか、少な過ぎるためであることがわかって
いる。(b) Prior Art The volume resistivity of toner used in conventional monochromatic electrophotography is within the range of I x 10'' Ωα - 9.9 x 1015 Ωα, and the potential of the image exposed area relative to the unexposed back area is Above, development was performed at 500V or higher.However, in two-color electrophotography,
As shown in FIGS. 1 to 3, the potential on the photoconductor of the first toner adsorption part is assumed to be ■A (for example, 600V), the potential of the back area before full exposure is assumed to be ■, and the potential before full exposure is The potential of the second toner adsorption part is ■. After the first toner is developed, it is necessary to perform full-surface exposure to reverse the polarity of the photoconductor, and this operation changes the potential of the back section to V.
, (e.g. -150V) to V82 (e.g. 450V)
V), and the potential V of the second toner adsorption part after the entire surface is exposed. If the difference between the potential VB2 of the back portion after full-surface exposure is set to 600 V or more, a problem arises in that the first toner is blown off when the second toner is developed. The cause of this is the potential vA of a part of the first toner.
It is known that this is because there is no difference (Ov in this case) between the voltage and the potential vB2 of the back portion after full exposure, or it is too small.
一方、感光体の特性上からみて、ＶＡ−Ｖｏの値はあま
り大きくすることは不可能であり、第２図のように、第
１トナ一部の電位■４と全面露光後のバック部の電位■
Ｂｌとの差を第１トナーの像が乱れないような値にする
と、今度は全面露光後のバック部の電位ｖＢ１と全面露
光後の第２トナーの吸着部の電位ＶＣ１との間の電位差
が小さくなって第２トナーの吸着が十分行われないため
画像が不鮮明になるとい゛う欠点を生じることになる。On the other hand, considering the characteristics of the photoreceptor, it is impossible to increase the value of VA-Vo too much, and as shown in Figure 2, the potential of the first toner part Potential■
If we set the difference from Bl to a value that does not disturb the image of the first toner, then the potential difference between the potential vB1 of the back part after full exposure and the potential VC1 of the second toner adsorption part after full exposure is This results in a disadvantage that the image becomes unclear because the second toner is not sufficiently attracted due to the small size.
（ハ）発明が解決しようとする問題点
従って、第１トナ一部の電位ＶＡ、全面露光後のバック
部の電位Ｖ、および全面露光後の第２トナーの吸着部の
電位ＶＣ４との間にはそれぞれ理想的な電位差を設ける
ことができず、鮮明な２色の電子写真を得ることが困難
であった。すなわち、第１トナーを鮮明に現像させよう
とすると、第２トナーを鮮明に現像することができず、
また、第２トナーを鮮明に現像しようとすると、第１ト
ナーを鮮明に現像することができないという欠点があっ
た。(c) Problems to be Solved by the Invention Therefore, there is a difference between the potential VA of a part of the first toner, the potential V of the back part after full exposure, and the potential VC4 of the second toner adsorption part after full exposure. It was not possible to provide an ideal potential difference between the two, making it difficult to obtain clear two-color electrophotography. In other words, when trying to develop the first toner clearly, the second toner cannot be developed clearly.
Furthermore, when trying to develop the second toner clearly, there is a drawback that the first toner cannot be developed clearly.
本発明は、第１トナ一部の電位ｖＡ、全面露光後のバッ
ク部の電位■８および全面露光後の第２トナーの吸着部
の電位Ｖ。１との間に理想的な電位差を設けることがで
きないような条件のもとでも、鮮明な２色の電子写真を
得ることができる２色の電子写真用の現像材料を提供す
ることを目的とする。In the present invention, the electric potential vA of a part of the first toner, the electric potential (8) of the back part after the whole surface exposure, and the electric potential V of the second toner adsorption part after the whole surface exposure. The purpose of the present invention is to provide a developing material for two-color electrophotography that can obtain clear two-color electrophotography even under conditions where it is not possible to create an ideal potential difference between do.
（ニ） 問題点を解決するための手段
この問題点を解決するための本発明は、導電性支持体に
光導電層、絶縁層を順次積層した３層感光体により２色
の画像信号を順次露光・現像する２色電子写真に用いる
現像材料において、初めに現像する第１トナーの体積抵
抗値を次に現像する第２トナーの体積抵抗値よりも高く
したものである。(d) Means for solving the problem The present invention to solve this problem sequentially transmits two-color image signals using a three-layer photoreceptor in which a photoconductive layer and an insulating layer are successively laminated on a conductive support. In a developing material used in two-color electrophotography that is exposed and developed, the volume resistivity of the first toner that is developed first is higher than the volume resistivity of the second toner that is developed next.
（ホ） 作用
上記のように構成される現像材料は、感光体上に第２ト
ナー吸着のための露光が行われ、この部分はたとえばマ
イナスの電位Ｖｃとなり、次いで第１トナー吸着のため
の露光が行われ、この部分はたとえばプラスの電位ｖＡ
となり、第１図に示すように第２トナーの体積抵抗値よ
りも高い体積抵抗値を有する第１トナーによって第１ト
ナ一部の現像が行われる。次に感光体上に全面露光が行
われて第２図に示すように全面露光後のバック部はたと
えばプラスの電位■８１となり、現像流の第１トナ一部
の電位ｖＡとの差は必要最小限の小さい値にとることが
可能になる。すなわち、ｖ８１−ｖｏｌが第２トナーの
吸着に支障ない大きさの値になるように、ＶＡ−ｖＢｌ
は小さい値にされる。これは第１トナーの体積抵抗値が
第２トナーの体積抵抗値よりも高いことによって可能に
なる。すなわち、第２トナーの現像の際、ＶＡ −ｖＢ
ｌの値が小さく、かつ、ｖＢｌ−ｖｃの値があまり大き
くとれない場合であっても、第１トナーは飛ばされるこ
となく、鮮明に感光体上に吸着され、かつ、第１トナー
の体積抵抗値よりも低い体積抵抗値を有する第２トナー
もまた鮮明に感光体上に吸着され第１トナー、第２トナ
ーの略。(E) Function The developing material configured as described above is exposed to light for second toner adsorption onto the photoreceptor, and this portion becomes, for example, a negative potential Vc, and then exposed to light for first toner adsorption. is carried out, and this part has a positive potential vA, for example.
As shown in FIG. 1, a portion of the first toner is developed by the first toner having a volume resistivity higher than that of the second toner. Next, the entire surface of the photoconductor is exposed to light, and as shown in FIG. It becomes possible to take it to the minimum small value. In other words, VA-vBl is
is set to a small value. This is possible because the volume resistivity of the first toner is higher than the volume resistivity of the second toner. That is, when developing the second toner, VA -vB
Even if the value of l is small and the value of vBl-vc is not very large, the first toner is clearly adsorbed onto the photoreceptor without being blown away, and the volume resistivity of the first toner is The second toner, which has a lower volume resistivity than the second toner, is also clearly adsorbed onto the photoreceptor.
第１表 るものである。Table 1 It is something that
（へ） 実施例
以下、本発明の詳細な説明する。第１表は実験結果をま
とめたもので、第１トナーの体積抵抗値が第２トナーの
体積抵抗値よりも小さいときは第２トナーの現像の際に
第１トナーが飛ばされて不鮮明になることがわかり、ま
た、ｖ８１−ｖｏｌの値が小さいと、第２トナーの吸着
が十分でなく画像が不鮮明になることがわかる。更に第
１トナーの体積抵抗値が第２トナーの体積抵抗値よりも
大きくなると、上記の不具合がなくなることがわかる。(f) Examples The present invention will be explained in detail below. Table 1 summarizes the experimental results. When the volume resistivity of the first toner is smaller than the volume resistivity of the second toner, the first toner is blown away during development of the second toner and becomes unclear. It can also be seen that when the value of v81-vol is small, the adsorption of the second toner is insufficient and the image becomes unclear. Furthermore, it can be seen that when the volume resistivity value of the first toner becomes larger than the volume resistivity value of the second toner, the above-mentioned problem disappears.
実用的には第１トナーの体積抵抗値を５×１０１５ΩＣ
ＩＲ〜１Ｘ１０１６Ωαとし、第２トナーの体積抵抗値
を１×１０ Ωａ１１〜９．９×１０１５Ωαとし、か
つ第１トナーの体積抵抗値を第２トナーの体積抵抗値の
２倍以上にとればよい。Practically, the volume resistance value of the first toner is set to 5×1015ΩC.
It is sufficient to set the IR to 1×10 16 Ωα, the volume resistivity of the second toner to 1×10 Ωa11 to 9.9×10 15 Ωα, and the volume resistivity of the first toner to be at least twice the volume resistivity of the second toner.
（ト）発明の効果
以上述べたように本発明の２色電子写真用の現像材料に
よれば、第１トナ一部の電位ｖＡ１全面露光後のバック
部の電位ｖ８および全面露光後の第２トナーの吸着部の
電位Ｖ。１との間にそれぞれ理想的な電位差を設けるこ
とができないような条件のもとでも、鮮明な電子写真が
得られるようになった。(G) Effects of the Invention As described above, according to the developing material for two-color electrophotography of the present invention, the potential vA1 of the first toner part, the potential v8 of the back part after the whole surface exposure, and the second toner potential after the whole surface exposure. Potential V of the toner adsorption part. Clear electrophotographs can now be obtained even under conditions where it is not possible to provide an ideal potential difference between the two.
第１図ないし第３図は２色電子写真における露光・現像
過程を示すグラフである。
■ ・・・全面露光前のバック部の電位、ｖＡ・・・第
１トナーの吸着部の電位、Ｖ８（Ｖ８１． Ｖ８２）・
・・全面露光後のバック部の電位、Ｖ。・・・全面露光
前の第２トナーの吸着部の電位、ＶＣｌ” Ｃ２’ ・
・・全面露光後の第２トナーの吸着部の電位1 to 3 are graphs showing the exposure and development process in two-color electrophotography. ■... Potential of the back part before full exposure, vA... Potential of the first toner adsorption part, V8 (V81. V82).
... Potential of the back part after full exposure, V. ...The potential of the second toner adsorption part before full exposure, VCl"C2' ・
...Electric potential of the second toner adsorption part after full exposure
Claims (1)
光体により２色の画像信号を順次露光・現像する２色電
子写真に用いる現像材料において、初めに現像する第１
トナーの体積抵抗値を次に現像する第２トナーの体積抵
抗値よりも高くしたことを特徴とする２色電子写真用の
現像材料。In a developing material used for two-color electrophotography in which two-color image signals are sequentially exposed and developed using a three-layer photoreceptor in which a photoconductive layer and an insulating layer are sequentially laminated on a conductive support, the first
A developing material for two-color electrophotography, characterized in that the volume resistivity of the toner is higher than the volume resistivity of a second toner to be subsequently developed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59274387A JPS61156163A (en) | 1984-12-28 | 1984-12-28 | Developing material for two color electrophotography |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59274387A JPS61156163A (en) | 1984-12-28 | 1984-12-28 | Developing material for two color electrophotography |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61156163A true JPS61156163A (en) | 1986-07-15 |
Family
ID=17540956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59274387A Pending JPS61156163A (en) | 1984-12-28 | 1984-12-28 | Developing material for two color electrophotography |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61156163A (en) |
-
1984
- 1984-12-28 JP JP59274387A patent/JPS61156163A/en active Pending
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