JPH01116565A - Liquid developer for color electrostatic photograph - Google Patents
Liquid developer for color electrostatic photographInfo
- Publication number
- JPH01116565A JPH01116565A JP62273110A JP27311087A JPH01116565A JP H01116565 A JPH01116565 A JP H01116565A JP 62273110 A JP62273110 A JP 62273110A JP 27311087 A JP27311087 A JP 27311087A JP H01116565 A JPH01116565 A JP H01116565A
- Authority
- JP
- Japan
- Prior art keywords
- liquid developer
- pigment
- color
- resin
- fog
- 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
- 239000007788 liquid Substances 0.000 title claims abstract description 27
- 239000000049 pigment Substances 0.000 claims abstract description 16
- 229920005989 resin Polymers 0.000 claims abstract description 12
- 239000011347 resin Substances 0.000 claims abstract description 12
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 claims abstract description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract 1
- CNPVJWYWYZMPDS-UHFFFAOYSA-N 2-methyldecane Chemical compound CCCCCCCCC(C)C CNPVJWYWYZMPDS-UHFFFAOYSA-N 0.000 description 5
- 229920001577 copolymer Polymers 0.000 description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 4
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 3
- JWAZRIHNYRIHIV-UHFFFAOYSA-N 2-naphthol Chemical compound C1=CC=CC2=CC(O)=CC=C21 JWAZRIHNYRIHIV-UHFFFAOYSA-N 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 2
- 229920000180 alkyd Polymers 0.000 description 2
- ZLFVRXUOSPRRKQ-UHFFFAOYSA-N chembl2138372 Chemical compound [O-][N+](=O)C1=CC(C)=CC=C1N=NC1=C(O)C=CC2=CC=CC=C12 ZLFVRXUOSPRRKQ-UHFFFAOYSA-N 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 239000004816 latex Substances 0.000 description 2
- 229920000126 latex Polymers 0.000 description 2
- 235000010187 litholrubine BK Nutrition 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- XLTMWFMRJZDFFD-UHFFFAOYSA-N 1-[(2-chloro-4-nitrophenyl)diazenyl]naphthalen-2-ol Chemical compound OC1=CC=C2C=CC=CC2=C1N=NC1=CC=C([N+]([O-])=O)C=C1Cl XLTMWFMRJZDFFD-UHFFFAOYSA-N 0.000 description 1
- FHEFMHNVEBIQDW-UHFFFAOYSA-N 1-[(4-chloro-2-nitrophenyl)diazenyl]naphthalen-2-ol Chemical compound OC1=CC=C2C=CC=CC2=C1N=NC1=CC=C(Cl)C=C1[N+]([O-])=O FHEFMHNVEBIQDW-UHFFFAOYSA-N 0.000 description 1
- WDQMWEYDKDCEHT-UHFFFAOYSA-N 2-ethylhexyl 2-methylprop-2-enoate Chemical compound CCCCC(CC)COC(=O)C(C)=C WDQMWEYDKDCEHT-UHFFFAOYSA-N 0.000 description 1
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- DPJCXCZTLWNFOH-UHFFFAOYSA-N 2-nitroaniline Chemical compound NC1=CC=CC=C1[N+]([O-])=O DPJCXCZTLWNFOH-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- HBHZKFOUIUMKHV-UHFFFAOYSA-N chembl1982121 Chemical compound OC1=CC=C2C=CC=CC2=C1N=NC1=CC=C([N+]([O-])=O)C=C1[N+]([O-])=O HBHZKFOUIUMKHV-UHFFFAOYSA-N 0.000 description 1
- PZTQVMXMKVTIRC-UHFFFAOYSA-L chembl2028348 Chemical compound [Ca+2].[O-]S(=O)(=O)C1=CC(C)=CC=C1N=NC1=C(O)C(C([O-])=O)=CC2=CC=CC=C12 PZTQVMXMKVTIRC-UHFFFAOYSA-L 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- GMSCBRSQMRDRCD-UHFFFAOYSA-N dodecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCOC(=O)C(C)=C GMSCBRSQMRDRCD-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- STVZJERGLQHEKB-UHFFFAOYSA-N ethylene glycol dimethacrylate Chemical compound CC(=C)C(=O)OCCOC(=O)C(C)=C STVZJERGLQHEKB-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 235000010985 glycerol esters of wood rosin Nutrition 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000944 linseed oil Substances 0.000 description 1
- 235000021388 linseed oil Nutrition 0.000 description 1
- 150000002688 maleic acid derivatives Chemical class 0.000 description 1
- 239000000025 natural resin Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- WOTPFVNWMLFMFW-ISLYRVAYSA-N para red Chemical compound OC1=CC=C2C=CC=CC2=C1\N=N\C1=CC=C(N(=O)=O)C=C1 WOTPFVNWMLFMFW-ISLYRVAYSA-N 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical class OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000003549 soybean oil Substances 0.000 description 1
- 235000012424 soybean oil Nutrition 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- KAKZBPTYRLMSJV-UHFFFAOYSA-N vinyl-ethylene Natural products C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/12—Developers with toner particles in liquid developer mixtures
- G03G9/122—Developers with toner particles in liquid developer mixtures characterised by the colouring agents
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Liquid Developers In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】 ［技術分野］ 本発明は静電写真用カラー液体現像剤に関する。[Detailed description of the invention] [Technical field] The present invention relates to color liquid developers for electrostatography.
［従来技術］
電子写真、静電記録等の静電写真に用いられるカラー液
体現像剤はいくつかの色の顔料とロジン、アマニ油、大
豆油、変性アルキド樹脂、スチレン、ブタジェン共重合
体、アクリル樹脂等の樹脂又は油脂を各色ごとに脂肪族
炭化水素のような高絶縁性、低誘電率の担体液中に粉砕
、分散することによって得ている。[Prior Art] Color liquid developers used in electrostatic photography such as electrophotography and electrostatic recording include pigments of several colors, rosin, linseed oil, soybean oil, modified alkyd resin, styrene, butadiene copolymer, and acrylic. They are obtained by crushing and dispersing resins such as resins or fats and oils for each color in a carrier liquid having high insulation properties and low dielectric constant, such as aliphatic hydrocarbons.
そしてこのような−組の現像剤を用いてカラー画像を得
る場合には電子写真感光紙や静電記録紙等に常法により
静電潜像を形成後、これを液体現像剤で現像するプロセ
スを各色について繰り返し行い、いくつかのトナーを順
次重ね合せることによりカラー画像を形成している。When a color image is obtained using such a developer, a process is used in which an electrostatic latent image is formed on electrophotographic paper, electrostatic recording paper, etc. by a conventional method, and then this is developed with a liquid developer. A color image is formed by repeating this process for each color and sequentially overlapping several toners.
このようなカラー静電写真は前述のようにいくつかの色
のトナーを重ね合わせるために地肌部分のカブリが累積
される。このようにして得られたカラー画像はコントラ
ストが低いものであり、十分に満足なものではなかった
。As described above, in such a color electrostatic photograph, toner of several colors is superimposed, so that fog accumulates in the background portion. The color image thus obtained had low contrast and was not fully satisfactory.
カラー静電写真では一般的にカブリが目立っている。マ
ゼンタトナーに用いられる顔料としては鮮明な紫がかっ
た色調とすぐれた透明性からカーミン６Ｂに代表される
アゾレーキ顔料が用いられる。しかし、アゾレーキ顔料
を用いて前述のような方法で分散して得られるトナーは
全て地肌カブリを生じるものであった。Fog is generally noticeable in color electrostatic photography. As a pigment used in magenta toner, an azo lake pigment represented by Carmine 6B is used because of its clear purplish color tone and excellent transparency. However, all of the toners obtained by dispersing the azo lake pigment in the above-described manner caused background fog.
また別の方法で得られるトナーとして染料によりラテッ
クスを染色し、これをトナーに応用することも検討され
ているが（特開昭４５−２５８１８ 、特開昭５８−１
０６１９等）これらのものではラテックスに染み込まな
かった染料の除去が完全でないと地肌カブリを生じると
いった問題がある。In addition, it is also being considered to dye latex with a dye and apply this to toner as a toner obtained by another method (Japanese Patent Application Laid-Open No. 45-25818, Japanese Patent Application Laid-Open No. 58-1
0619, etc.) These products have the problem of causing background fogging if the dye that has not penetrated into the latex is not completely removed.
［口 的］
本発明の目的は前述したような問題を解決し、カラー静
電写真に適したカラー液体現像剤を提供することにある
。[Information] An object of the present invention is to solve the above-mentioned problems and provide a color liquid developer suitable for color electrostatic photography.
また本発明が静電写真法による単色カラー画像を得るた
めの静電写真用カラー液体現像剤に応用できることはも
ちろんである。Furthermore, it goes without saying that the present invention can be applied to a color liquid developer for electrostatic photography for obtaining monochromatic color images by electrostatic photography.
［構 成］
上記目的を達成するための本発明の構成は、脂肪族炭化
水素からなる担体液中に、顔料および樹脂を主成分とす
るトナーを分散してなる液体現像剤において、上記顔料
が下記一般式で表わされる物質であることを特徴とする
静電写真用カラー液体現像剤である。[Structure] The structure of the present invention for achieving the above object is a liquid developer comprising a toner mainly composed of a pigment and a resin dispersed in a carrier liquid made of an aliphatic hydrocarbon, in which the pigment is This is a color liquid developer for electrostatic photography characterized by being a substance represented by the following general formula.
一般式
（ただし、置換基ＸＳＹはそれぞれＨＳＮＯ２、ＣＩ、
ＣＨ３のうちの何れかである。）本発明で使用される顔
料は前記一般式で示されるβ−ナフトール系不溶性アゾ
顔料である。General formula (however, the substituents XSY are HSNO2, CI,
It is any one of CH3. ) The pigment used in the present invention is a β-naphthol-based insoluble azo pigment represented by the above general formula.
このものの代表例としては次のようなものがあげられる
。Representative examples of this include the following:
オルトニトロアニリンオレンジ
レーキレッド４Ｒ
パラクロルレッド
ジニトロアニリンオレンジ
パラレッド
パーマネントレッドＲ
このような顔料を用いて液体現像剤を調製するにはこの
顔料１〜１０重量部と結着剤（樹脂）１〜５０ｆｆｉ量
部と担体液４０〜１００重量部とをアトライター、ボー
ルミル、サンドミルなどで混線分散して濃縮トナーをつ
くり、必要によりこれを同様な担体液で希釈して用いれ
ばよい。Orthonitroaniline Orange Lake Red 4R Parachlor Red Dinitroaniline Orange Para Red Permanent Red R To prepare a liquid developer using such a pigment, 1 to 10 parts by weight of this pigment and 1 to 50 parts of a binder (resin) are added. A concentrated toner may be prepared by cross-dispersing the above amount and 40 to 100 parts by weight of a carrier liquid using an attritor, ball mill, sand mill, etc., and if necessary, this may be diluted with a similar carrier liquid before use.
ここでの結着剤としてはアルキッド樹脂、ロジン食性フ
ェノールホルムアルデヒド樹脂、水素添加ロジンの多価
アルコールエステル、ポリアクリル又はポリメタクリル
エステル樹脂、スチレン樹脂、塩化ゴムなどが使用され
るが、特に下記一般式（Ｉｍ）
［但し、Ｒ３は水素又はメチル基 Ｒ４は−ＣＯＯＣ，
Ｈ，，，，又は−〇ＣＯＣ，Ｈ，，。。As the binder here, alkyd resin, rosin-edible phenol formaldehyde resin, polyhydric alcohol ester of hydrogenated rosin, polyacrylic or polymethacrylic ester resin, styrene resin, chlorinated rubber, etc. are used, but in particular, the following general formula (Im) [However, R3 is hydrogen or methyl group, R4 is -COOC,
H,,,, or -〇COC,H,,. .
（ｎは６〜２０の整数）である。］
で表わされる七ツマ−とアクリル酸、メタクリル酸、ビ
ニルピリジン、
下記一般式（ｍ）
［但し、Ｒ５は水素又はメチル基、Ｒｓは−ＣＯＯＣ−
Ｈ２−＋１又は−０ＣＯＣ，Ｒ２，，１（ｎは１〜５の
整数）である。］
で表わされるモノマー、
下記一般式（ＩＶ）
／
［但し、Ｒ７は水素又はメチル基、Ｒ８は−Ｎ （ＣＨ
３）２、−Ｎ （Ｃ２Ｈ５）２又は−ＯＨである。］
で表わされる七ツマ−及びエチレングリコール、ジメタ
アクリレートから選ばれる１８ｉ又は２８ｉ以上の七ツ
マ−との共重合体（ブロック共重合体を含む）の使用が
効果的である。(n is an integer of 6 to 20). [However, R5 is hydrogen or a methyl group, Rs is -COOC-
H2-+1 or -0COC, R2,,1 (n is an integer from 1 to 5). ] A monomer represented by the following general formula (IV) / [where R7 is hydrogen or a methyl group, R8 is -N (CH
3) 2, -N (C2H5)2 or -OH. ] It is effective to use a copolymer (including a block copolymer) with a heptamer of 18i or 28i or more selected from ethylene glycol and dimethacrylate.
一般式（ＩＩ）で表わされるビニルモノマー成分の共重
合体に占める割合は３０〜９５重量％くらいが適当であ
る。The appropriate proportion of the vinyl monomer component represented by formula (II) in the copolymer is about 30 to 95% by weight.
結着剤には必要に応じてこれらにエステルガム、軟化ロ
ジン等の天然樹脂や、天然樹脂変性マレイン酸樹脂、天
然樹脂変性フェノール樹脂、天然樹脂変性ポリエステル
樹脂、天然樹脂変性ペンタエリスリトール樹脂、エポキ
シ樹脂等の天然樹脂変性熱硬化性樹脂が加えられてよい
。As a binder, natural resins such as ester gum and softened rosin, natural resin-modified maleic acid resin, natural resin-modified phenol resin, natural resin-modified polyester resin, natural resin-modified pentaerythritol resin, and epoxy resin can be used as binders. Natural resin-modified thermosetting resins, such as, may be added.
なお、担体液としてはパラフィン系又はイソパラフィン
系炭化水素（エッソ社製のアイソパーＨ，アイソパーＧ
１アイソパーＬ１アイソパーに、ナフサＮｏ、６ソルベ
ツソ １００など）、リグロイン、ｎ−ヘキサン、ｎ−
へブタン、１ｓ。The carrier liquid may be a paraffinic or isoparaffinic hydrocarbon (Isopar H, Isopar G manufactured by Esso).
1 Isopar L1 Isopar, naphtha No., 6 Solbetuso 100, etc.), ligroin, n-hexane, n-
Hebutane, 1s.
−オクタン、ｎ−オクタン、四塩化炭素、トリクロロト
リプルオロエタン、シクロヘキサン等が単独であるいは
２ＰＩｉ以上が組合わされて使用される。-Octane, n-octane, carbon tetrachloride, trichlorotrioleoethane, cyclohexane, etc. are used alone or in combination of 2PIi or more.
以下、実施例によって本発明を具体的に説明する。Hereinafter, the present invention will be specifically explained with reference to Examples.
なお、実施例に記載の各成分の量（部）は重量部である
。Note that the amounts (parts) of each component described in the Examples are parts by weight.
実施例
濃縮トナーの組成
レーキレッド４Ｒ５部
ラウリルメタアクリレート／グリ
シリルメタアクリレート／メチル
メタクリレート（８ハハ）共重合体
（アイソパーＨ分散液固形分３０％）３０部スチレンブ
タジェン／２エチル
ヘキシルメタクリレート（１／２）共重合体（アイソパ
ーＨ分散液、固形分４０％）２０部
アイソパーＨ４５部
よりなる混合物をボールミルに入れ２４時間分散して濃
縮トナーを作った。この濃縮トナー３０部をアイソパー
Ｇ１５Ｉで希釈して液体現像剤を調製した。続いてこの
液体現像剤を用い静電プリンタープロッターＶ−８０（
／＜−サテツク社製）で印字したところ地肌部のカブリ
のない、かつ、画像濃度が１．３１と高い、優れた画像
が得られた。Example Composition of concentrated toner Lake Red 4R 5 parts Lauryl methacrylate/glycylyl methacrylate/methyl methacrylate (8HA) copolymer (isopar H dispersion solids content 30%) 30 parts Styrene butadiene/2 Ethylhexyl methacrylate (1/2) 2) A mixture of 20 parts of copolymer (Isopar H dispersion, solid content 40%) and 45 parts of Isopar H was placed in a ball mill and dispersed for 24 hours to prepare a concentrated toner. A liquid developer was prepared by diluting 30 parts of this concentrated toner with Isopar G15I. Next, using this liquid developer, an electrostatic printer plotter V-80 (
/<- (manufactured by Satek Co., Ltd.), an excellent image was obtained with no background fog and a high image density of 1.31.
なお、静電記録紙にはリコー製静電記録紙タイプＡＶを
用いた。The electrostatic recording paper used was Ricoh's electrostatic recording paper type AV.
比較例
実施例の顔料をブリリアントカーミン６Ｂに変えたほか
は実施例と同様の方法で比較用液体現像剤を調製した。Comparative Example A comparative liquid developer was prepared in the same manner as in the example except that the pigment used in the example was changed to brilliant carmine 6B.
この液体現像剤を用いて静電プリンターブロック−（Ｖ
−８０）で印字したところ画像濃度が１．１５であり
地肌部のカブリの目立つものであった。Using this liquid developer, electrostatic printer block (V
-80), the image density was 1.15, and fog on the background was noticeable.
下足表−１に評価結果を比較して示す。The evaluation results are shown in Table 1 for comparison.
表−１
ｍ）地肌カブリは印字後の地肌をマクベス濃度計で測り
生紙の濃度を差引いて評価した。Table 1 m) Background fog was evaluated by measuring the background after printing with a Macbeth densitometer and subtracting the density of raw paper.
［効 果］
実施例及び比較例の対比から明らかなように本発明の液
体現像剤は地肌カブリがなく画像濃度も高いものであり
カラー画像を得るときのコントラストを向上させ、かつ
、耐光性のよいものである。[Effects] As is clear from the comparison between Examples and Comparative Examples, the liquid developer of the present invention has no background fog and high image density, improves the contrast when obtaining color images, and has excellent light resistance. It's good.
Claims (1)
主成分とするトナーを分散してなる液体現像剤において
、上記顔料が下記一般式で表わされる物質であることを
特徴とする静電写真用カラー液体現像剤。 一般式 ▲数式、化学式、表等があります▼ （ただし、置換基Ｘ、ＹはそれぞれＨ、ＮＯ＿２、Ｃｌ
、ＣＨ＿３のうちの何れかである。）[Scope of Claims] A liquid developer comprising a toner mainly composed of a pigment and a resin dispersed in a carrier liquid composed of an aliphatic hydrocarbon, wherein the pigment is a substance represented by the following general formula. Characteristic color liquid developer for electrostatic photography. General formula▲There are mathematical formulas, chemical formulas, tables, etc.▼ (However, substituents X and Y are H, NO_2, and Cl, respectively.
, CH_3. )
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62273110A JPH01116565A (en) | 1987-10-30 | 1987-10-30 | Liquid developer for color electrostatic photograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62273110A JPH01116565A (en) | 1987-10-30 | 1987-10-30 | Liquid developer for color electrostatic photograph |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01116565A true JPH01116565A (en) | 1989-05-09 |
Family
ID=17523269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62273110A Pending JPH01116565A (en) | 1987-10-30 | 1987-10-30 | Liquid developer for color electrostatic photograph |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01116565A (en) |
-
1987
- 1987-10-30 JP JP62273110A patent/JPH01116565A/en active Pending
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