JPS599670A - Electrophotographic carrier - Google Patents

Electrophotographic carrier

Info

Publication number
JPS599670A
JPS599670A JP57119534A JP11953482A JPS599670A JP S599670 A JPS599670 A JP S599670A JP 57119534 A JP57119534 A JP 57119534A JP 11953482 A JP11953482 A JP 11953482A JP S599670 A JPS599670 A JP S599670A
Authority
JP
Japan
Prior art keywords
dye
resin
toner
iron powder
carrier
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
Application number
JP57119534A
Other languages
Japanese (ja)
Inventor
Shigenobu Osawa
大沢 重信
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP57119534A priority Critical patent/JPS599670A/en
Publication of JPS599670A publication Critical patent/JPS599670A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00Developers
    • G03G9/08Developers with toner particles
    • G03G9/10Developers with toner particles characterised by carrier particles
    • G03G9/113Developers with toner particles characterised by carrier particles having coatings applied thereto
    • G03G9/1138Non-macromolecular organic components of coatings

Abstract

PURPOSE:To stabilize humidity characteristics of a developer, by coating a core material with a resin coating material contg. a dye as a charge controller. CONSTITUTION:A soln. of a resin coating material is obtained by adding as a charge controller, 1-15wt% dye, such as nigrosine type dye, to a soln. prepd. by dissolving 2-15wt% (meth)acrylic resin or epoxy resin in an org. solvent, such as acetone. Then, said soln. is sprayed over the surface of iron powder as a core material to coat the iron powder with 0.1-1.5wt% resin coating material based on the iron powder, thus permitting control of toner charging without using a dye for the toner.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明はたとえば複写機等に用いられる゛電子写真用キ
ャリアに関する。
DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an electrophotographic carrier used, for example, in a copying machine.

〔発明の技哨的背獣とその問題点J ・従来、トナーとキャリアとからなる乾式二成分現像削
において、トナーの帝電惨性を設定する場合、鉄粉ある
いは樹脂コート材とのw1原帯電によって所望の極性と
なるようにトナー樹脂バインダーを選定し、必要に応じ
荷電制御剤、流動性向上剤、離型剤等を含有させる。す
なわち、この樹脂バインダーは定着性、耐オフセット性
、流動性および現1#器内での攪拌に対する耐衝撃性等
を満足しなければならず、代表的なものとしてはポリス
チレン、スチレン−アクリル共重合体、ポリエステル、
ポリビニル、ブチラール、エポキシ位48′r1、エチ
レン−酢r俊ビニル共重合体寺があり、これらのほとん
どが酸化鉄粉キャリアとの摩擦帯電により負慣性に帝′
醒する。このため、上記flit脂を用いたトナーの電
荷綾の制伸や電性の反転を行なうには鉦荷制御剤が必要
であり、グラス憔性のトナーにはニグロ7ン糸の電子供
与性の染料、たとえばナフテン酸や高級脂肪酸の金員塩
、アルコキシル化アミン、四級アンモニー2ム塩、アル
キンアミド、りングステン、モリブデン酸レーキ顔料、
フッ素処理活性剤寺が王として使用され、マイナス極性
のトナーには′電子受容性の有機錯体、たとえイb ば腐木化パラフィン、塩素窒ポリエステル、銅フタロシ
アニンのスルホニルアミンsix;a用である。したが
つもこれらトナーの帯篭祉を市11付するには、染料の
処方や種類を75)えなければならない。また、現1家
削の湿度に対する安定性はこれらトナーのみならず、キ
ャリアの’HTi: tieが犬きく寄与している。
[Technical backbone of invention and its problems J] Conventionally, in dry two-component development abrasion consisting of toner and carrier, when setting the Teiden disastrous properties of the toner, it is necessary to use the w1 raw material with iron powder or resin coating material. The toner resin binder is selected so as to have the desired polarity when charged, and contains a charge control agent, a fluidity improver, a mold release agent, etc. as necessary. In other words, this resin binder must satisfy fixing properties, anti-offset properties, fluidity, and impact resistance against agitation in the current 1# container. Typical examples include polystyrene, styrene-acrylic copolymer Combined, polyester,
There are polyvinyl, butyral, epoxy position 48'r1, and ethylene-acetyl vinyl copolymers, and most of these exhibit negative inertia due to frictional charging with iron oxide powder carriers.
wake up For this reason, a charge control agent is required to control the charge distribution and reverse the charge of the toner using the above-mentioned flit fat, and for glass-soluble toner, the electron-donating property of Nigro 7 yarn is required. Dyes, such as naphthenic acids and gold salts of higher fatty acids, alkoxylated amines, quaternary ammonium salts, alkynamides, ringsten, molybdate lake pigments,
Fluorinated activators are used as the main agents, and for toners of negative polarity, electron-accepting organic complexes such as sulfonylamines such as rotten paraffin, chlorinated polyester, and copper phthalocyanine are used. However, in order to use these toners properly, the formula and type of dye must be determined75). In addition, not only these toners but also the carrier 'HTi:tie' significantly contributes to the humidity stability of the current product.

〔発明の目的」 不発明は上記事1Hにもとづいてなさfしたもので、そ
の目的とするところは、トナーに染料を用いることなく
トナーの荷電制御が行なえるとともに現隊削の湿度特性
の安定化力i図れるようにした電子写真用キャリアτ提
供することVCある。
[Object of the invention] The invention was made based on the above 1H, and its purpose is to control the charge of toner without using dye in the toner, and to stabilize the humidity characteristics of the current atomization. VC is offering an electrophotographic carrier τ that can be used in a variety of ways.

〔発明の慨安」 本発明は、荷市制側j剤としての染料を包有する樹脂被
覆材でコア材を被覆してなることを物〔発明の実施例〕 以下、本発明の一実IMvIOを説明する。すなわち、
本発明に係る電子写真用キャリアは、コア材としての鉄
粉の表向に、メタクリル系樹脂、アクリル系樹脂あるい
はエポキシ系樹脂tCcl荷制御剤としての染料たとえ
ば二ダロ/ン糸染料をよむ被覆祠を被覆してなる。すな
わち、このキャリア、・よ、アセトン、メチルエチルケ
トン、メチルイソブチルグトン、トルエン、キシレンあ
るいは酢酸エチル寺の41機浴媒、あるいはこれらのl
足台溶媒に、メタクリル系樹脂あるいはアクリル系樹脂
前、また必要に応じて他の樹脂あるいは蚕加剤を俗解し
た樹脂浴液に、コア祠である鉄粉を綬故する方法、ある
いは鉄粉を流動化させておき、これに上61樹脂俗液を
スプレーする方法前により上記樹脂溶液を鉄粉に被覆後
、これを所定の温度で熱処理し、鉄粉の表面に被覆層を
形成することによって製造することができる。この場合
、上記浴液のポリマー濃度については特に限定はないが
、スプレー法の場合には、溶液粘度および被覆後の乾燥
工程の効率化を考慮すると、2〜15wt%が好ましい
[Summary of the invention] The present invention relates to a product in which a core material is coated with a resin coating material containing a dye as a shipping agent. Explain. That is,
The carrier for electrophotography according to the present invention is coated with a methacrylic resin, acrylic resin, or epoxy resin, tCcl, and a dye such as a 2D yarn dye as a load control agent on the surface of iron powder as a core material. It is coated with. That is, this carrier is acetone, methyl ethyl ketone, methyl isobutylgtone, toluene, xylene, or ethyl acetate, or any of these solvents.
A method of adding iron powder, which is a core material, to the base solvent, before methacrylic resin or acrylic resin, and if necessary, to a resin bath solution containing other resins or silkworm additives. By coating the iron powder with the resin solution described above and heat-treating it at a predetermined temperature to form a coating layer on the surface of the iron powder. can be manufactured. In this case, the polymer concentration of the bath solution is not particularly limited, but in the case of a spray method, it is preferably 2 to 15 wt% in consideration of solution viscosity and efficiency of the drying process after coating.

塘た、メタクリル系樹脂としては、三菱レイヨン社製の
アクリベットM、8M、アクリコンAC1住友化学社製
のスミペックB −L G、旭化成社製のデルペット5
0.、N、 60 N、デルパウダ等が好ましい。また
、アクリル系樹脂としては、三菱レイヨン社製のダイヤ
ナールBR−50,51,52,60,64,70,7
5゜77.80.83.85,100.101等、Go
od Year社製のブライ第2イトACL、AC。
The methacrylic resins include Acryvet M and 8M manufactured by Mitsubishi Rayon Co., Ltd., Acrycon AC1, Sumipec B-LG manufactured by Sumitomo Chemical Co., Ltd., and Delpet 5 manufactured by Asahi Kasei Co., Ltd.
0. , N, 60 N, delpowder, etc. are preferred. In addition, as the acrylic resin, Dianal BR-50, 51, 52, 60, 64, 70, 7 manufactured by Mitsubishi Rayon Co., Ltd.
5゜77.80.83.85, 100.101 etc., Go
Bligh 2nd item ACL, AC manufactured by od Year.

VTACL等が用いられる。さらに、キャリアの被覆量
は鉄粉に対して0.1〜1.5wt%が好ましい。
VTACL etc. are used. Furthermore, the coating amount of the carrier is preferably 0.1 to 1.5 wt% based on the iron powder.

筐た、上記染料は、負帯を極性のトナーに対しては電子
供与性のニグロシン系染料が好ましい。ここで、ニグロ
シン系染料としては、シー・アイ・ソルベント・ブラッ
ク5 (C,L 8o1ventBlack 5 )お
よびシー・アイ・ソルベント・ブラック7 (C,1,
5olvent Black 7 )に分類されるニグ
ロシン染料がその1つであり、このレリとしては、オリ
エント化学社製のオリエント・スピリット・ブラック・
ニー・ビー(0rientSpirit Black 
AB )、オリエント・スピリット・ブラック、ニス・
ビー(0rient 5p1ritBla’ck S 
B ) 、ニグロシン・ベース螢イー、エックス(Ni
 grosine Ba5e EX )、住友化学社製
のスピリット・ブラック(5pirit Black 
)4850 、、%980.4900 、魔920等が
あげられるが、これら限定されるものではない。
The above dye is preferably an electron-donating nigrosine dye for a toner having negative polarity. Here, as the nigrosine dye, C.I. Solvent Black 5 (C,L8o1ventBlack5) and C.I. Solvent Black 7 (C,1,
One of these dyes is nigrosine dye, which is classified as 5olvent Black 7).
Nee Bee (0rientSpirit Black
AB), Orient Spirit Black, Varnish.
Be (0rient 5p1ritBla'ck S
B), Nigrosine-based Firefly E, X (Ni
grosine Ba5e EX), Spirit Black manufactured by Sumitomo Chemical Co., Ltd.
)4850, %980.4900, 920, etc., but are not limited to these.

また、上記ニグロシン染料の他には上iピニダロシン染
料と脂肪族−塩基rvI/、−Zたけ脂肪族二塩鍼酸の
少なくとも一方とを反応させた脂肪酸変性ニグロシン染
料があり、この例としては、オリエント化学社製のオイ
ルブラック(Oll Black)BW、BS 、80
.BY、およびオイルブラック# 5 (011Bla
ck’5 ) *がめげられる。また1、 この荷電制
御剤としての染料のwZ覆材中の含有量はバインダー樹
脂に対し1〜15wt%がよく、特に2〜10wt%が
好せしいvlこれに限定されるも′のでもない。さらに
、上記コア材としては鉄粉であればあらゆるものが便用
でき、また形状も限定されるものではない。
In addition to the above-mentioned nigrosine dyes, there are fatty acid-modified nigrosine dyes made by reacting the above-mentioned pinidarosine dye with at least one of aliphatic base rvI/ and -Ztake aliphatic disalt acupuncture acid, examples of which include: Oil black manufactured by Orient Chemical Co., Ltd. BW, BS, 80
.. BY, and Oil Black #5 (011Bla
ck'5) *is defeated. In addition, 1. The content of the dye as a charge control agent in the WZ coating material is preferably 1 to 15 wt%, particularly preferably 2 to 10 wt%, based on the binder resin, but it is not limited to this. . Further, as the core material, any iron powder can be conveniently used, and the shape is not limited.

−万、上記キャリアとともに乾式二成分現1象剤を構成
するトナーには特に制限はなく、たとえばスチレン−ア
クリル共重合体、ポリエステル樹脂、エポキシ系樹脂、
エチレン−酢酸ヒニル共重合体寺が用いられる。
- There are no particular restrictions on the toner that constitutes the dry two-component rendition agent together with the above-mentioned carrier, such as styrene-acrylic copolymer, polyester resin, epoxy resin, etc.
Ethylene-hynylacetate copolymer is used.

以上の構成によれば、境は削の湿度特性を安定させるこ
とができるとともに、披瞳材のバインダー樹脂を選択す
ることによりトナーの処方を変えずにトナーの帯を量を
制御することができる。
According to the above configuration, it is possible to stabilize the humidity characteristics of the boundary scraper, and by selecting the binder resin of the laryngeal material, it is possible to control the amount of toner band without changing the toner formulation. .

次に、本発明の第1の実験例を説明する。捷ず、メタク
リル樹脂であるアクリベットM(三菱レイヨン社製)1
00重量部と、脂肪酸変性ニグロシン染料であるオイル
ブラック#5(オリエント化学社製)8重量部とをトル
エン500重量部、酢酸エチル400重量部に溶解し、
塗布液を―整した。ついで、粒子径範囲1oo〜250
メツシユの不定形鉄粉(見掛′&1度2.64t/an
j) 10000重量部を上記塗布液に浸漬し、流動さ
せなから浴剤を蒸発させ除去し、このようにしてキャリ
アを舟だ。一方、トナーIri。
Next, a first experimental example of the present invention will be explained. Acrybet M (manufactured by Mitsubishi Rayon Co., Ltd.), which is a methacrylic resin, 1
00 parts by weight and 8 parts by weight of Oil Black #5 (manufactured by Orient Chemical Co., Ltd.), which is a fatty acid-modified nigrosine dye, were dissolved in 500 parts by weight of toluene and 400 parts by weight of ethyl acetate.
The coating solution was adjusted. Then, the particle size range is 1oo~250
Metsuyu irregular shaped iron powder (apparent & 1 degree 2.64t/an
j) Immerse 10,000 parts by weight in the above coating solution, allow it to flow, and then evaporate and remove the bath agent. In this way, the carrier is floated. On the other hand, toner Iri.

スチレン−アクリル樹脂であるハイマ〜8BIJ600
(三菱化成社製、T170’C1Mn=29700 、
Mw=73300 )90jtit部、カーボン1.4
A100(三菱化成社製)6重量部、マイクロクリスタ
リンワックス220 (モーピル石゛油社#)4重量部
を三本ロールにて浴融混練し、ジェットミルにて粉砕後
、分級′?c打なうことによシ舟た。このようrlc 
Lで優られたキャリア1000重量部に対してトナー4
0重菫部を1jポリエチレン製ビンに秤り、!:、D、
110r、p、mにて1時間攪拌して現1駅削を祠祭し
た。
Hyma~8BIJ600, a styrene-acrylic resin
(Mitsubishi Kasei Corporation, T170'C1Mn=29700,
Mw=73300) 90jtit part, carbon 1.4
6 parts by weight of A100 (manufactured by Mitsubishi Kasei Corporation) and 4 parts by weight of Microcrystalline Wax 220 (Mopil Petroleum Co., Ltd.) were melt-kneaded in a three-roll bath, pulverized in a jet mill, and then classified. I was reluctant to hit c. like this rlc
4 parts by weight of toner per 1000 parts by weight of carrier
Weigh the 0-fold violet into a 1J polyethylene bottle, and! :,D,
The mixture was stirred at 110 rpm, p, and m for 1 hour, and the current 1-station polishing was performed as a shrine.

そして、このときのトナーの帯電量を東芝ケミカル製ブ
ローオフ扮体帝[量測定装置TB−200uでif’l
14定したところ、20 ’C150%RHで−23,
5μC/fであった。また、上記現摩剤を用い、複写機
(東芝社製B、、o 7.501 )を使用し、8ei
函光体上の靜ta隊を曳1象した結果、鮮明な画1象が
侮られた。また、20℃、86%RHでは22.2μC
/7,20℃、92%RHでは18.5μC/rであり
、このときの複写画1沫もカブリのない鮮明なIJjJ
r+象であった。
Then, the amount of charge on the toner at this time was measured using a Toshiba Chemical blow-off meter (quantity measuring device TB-200u).
14, -23 at 20'C150%RH,
It was 5 μC/f. In addition, using the above-mentioned present lubricant and using a copying machine (B, o 7.501 manufactured by Toshiba Corporation), 8ei
As a result of drawing a picture of a silent troop on a box light, the clear picture was despised. Also, at 20℃ and 86%RH, it is 22.2μC.
/7, 18.5 μC/r at 20°C and 92% RH, and even one drop of the copy at this time has clear IJjJ without fogging.
It was r+ elephant.

次に、本発明の第2の実験例を説明する。まず、アクリ
ル樹脂であるダイヤナールBR−50(三菱レイヨン社
製)100M壜部と、脂肪酸変性ニグロノン染料である
オイルブラック#5(オリエント化学社製)8重量部と
をトルエン2000徂綾部に溶解し、塗布液を調整した
。ついで、粒子径範囲100〜250メツシユの不定形
鉄粉(見掛密度2.64 ?/(瀞3)10000重喰
部を上記塗布液にtそ浦し、流動させなから溶剤を蒸発
させ除去し、このようにしてキャリアを得た。そして、
このキャリアに第1の実験例のトナーを同様に混合し、
帯電波を測定したところ、20 ’C15oチRHで−
19,3pc/f、 20℃、86%RHで−18,0
μc/?、20℃、92%RHで−17,2p c/?
であり、92%RH時の複写画像はカブリのない鮮明な
IIl!+7虚でめった。
Next, a second experimental example of the present invention will be explained. First, a 100M bottle of Dianal BR-50 (manufactured by Mitsubishi Rayon Co., Ltd.), which is an acrylic resin, and 8 parts by weight of Oil Black #5 (manufactured by Orient Chemical Co., Ltd.), which is a fatty acid-modified nigronon dye, were dissolved in 2000 parts by weight of toluene. , the coating solution was prepared. Next, 10,000 parts of amorphous iron powder (apparent density 2.64?/(3)) having a particle size range of 100 to 250 mesh was poured into the above coating solution, and the solvent was evaporated and removed without allowing it to flow. And that's how I got my career. And,
The toner of the first experimental example was similarly mixed with this carrier,
When I measured the charged waves, it was - at 20'C15oCHRH.
19.3pc/f, -18.0 at 20℃, 86%RH
μc/? , -17.2 p c/? at 20°C and 92% RH.
The copied image at 92% RH is clear with no fog! I got hit with +7 imaginary.

次に、第1の実験列のトナーを不定形鉄粉キャリア(粒
度範囲100〜250メツシユ、見掛そ厩2.64 f
/cvn” )  に同僚に混合し、帯電量を測定した
とコロ、20’C,50%RHT: −20、2A c
、#、20’C,86%RHで−15,。
Next, the toner of the first experimental row was transferred to an amorphous iron powder carrier (particle size range 100 to 250 mesh, apparent size 2.64 f
/cvn") and measured the amount of charge. 20'C, 50% RHT: -20, 2A c
, #, -15, at 20'C, 86% RH.

μc/f t’あり、86%RH時の複写画1家はわず
かにカブリが発生し、その方ブリ諦度は09%であっf
coさらに、20”C,92%RHでは帯電量−13,
4μC/fとなり、この時の画1象は明らかなカブリを
生じた。
With μc/f t', slight fogging occurred in one copy at 86% RH, and the degree of blurring was 09%.
co Furthermore, at 20"C and 92%RH, the charge amount is -13,
It became 4 μC/f, and one image at this time had obvious fog.

なり、以上の実験結果を下表に1とめてボす。The above experimental results are summarized in the table below.

〔発明の幼果〕[The young fruits of invention]

以上説明したように不発明によれば、荷電制御則として
の染料を含有する樹脂破情材でコア材を被覆したから、
トナーに染料を用いることなくトナーの荷屯制側jが行
なえるとともに現鍬削の湿就特性の安定化が図れる等優
れた効果を央する。
As explained above, according to the invention, since the core material is coated with a resinous material containing a dye as a charge control law,
It has excellent effects such as being able to control the toner load without using dye in the toner and stabilizing the wetting characteristics of the current hoeing.

Claims (3)

【特許請求の範囲】[Claims] (1)荷電制御剤としての染料を含有する樹脂被覆材で
コア材を破櫃してなることを特徴とする電子写真用キャ
リア。
(1) An electrophotographic carrier characterized in that the core material is broken with a resin coating material containing a dye as a charge control agent.
(2)樹脂被覆材はメタクリル系樹脂あるいはアクリル
糸樹脂を用いた特許請求の範囲第1項記載の醒子写に用
キャリア。
(2) The carrier for photocopying according to claim 1, wherein the resin coating material is a methacrylic resin or an acrylic thread resin.
(3)染料はニグロシン系染料、あるいはニグロシン系
染料と脂肪族−塩基酸まだは脂肪族二基硫酸の少なくと
も一万とを反応させた脂肪酸変性ニグロシン染料である
特許請求の範囲第1項記戦のイ子写真用キャリア。
(3) The dye is a nigrosine dye, or a fatty acid-modified nigrosine dye obtained by reacting a nigrosine dye with at least 10,000 aliphatic-basic acids or aliphatic dibasic sulfuric acids. Iko's photo carrier.
JP57119534A 1982-07-09 1982-07-09 Electrophotographic carrier Pending JPS599670A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57119534A JPS599670A (en) 1982-07-09 1982-07-09 Electrophotographic carrier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57119534A JPS599670A (en) 1982-07-09 1982-07-09 Electrophotographic carrier

Publications (1)

Publication Number Publication Date
JPS599670A true JPS599670A (en) 1984-01-19

Family

ID=14763659

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57119534A Pending JPS599670A (en) 1982-07-09 1982-07-09 Electrophotographic carrier

Country Status (1)

Country Link
JP (1) JPS599670A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0299973A (en) * 1988-10-06 1990-04-11 Fuji Elelctrochem Co Ltd Carrier for electrophotographic development
US5354638A (en) * 1989-12-11 1994-10-11 Tdk Corporation Magnetic carrier for use in electrophotographic development

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0299973A (en) * 1988-10-06 1990-04-11 Fuji Elelctrochem Co Ltd Carrier for electrophotographic development
JPH0579986B2 (en) * 1988-10-06 1993-11-05 Fuji Electrochemical Co Ltd
US5354638A (en) * 1989-12-11 1994-10-11 Tdk Corporation Magnetic carrier for use in electrophotographic development

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