JPS60145881A - Heat-resistant stilt material for pressure-sensitive copying paper - Google Patents
Heat-resistant stilt material for pressure-sensitive copying paperInfo
- Publication number
- JPS60145881A JPS60145881A JP59001724A JP172484A JPS60145881A JP S60145881 A JPS60145881 A JP S60145881A JP 59001724 A JP59001724 A JP 59001724A JP 172484 A JP172484 A JP 172484A JP S60145881 A JPS60145881 A JP S60145881A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- heat
- copying paper
- sensitive copying
- resistant
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/124—Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
- B41M5/1243—Inert particulate additives, e.g. protective stilt materials
Landscapes
- Color Printing (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は粒径が3〜10μのバイアずロースコーンスタ
ーチよシなる感圧複写紙用スチルト材に関するもので、
その目的とするところは、高性能で耐熱性に優れ、しか
も製法が容易で安価な感圧複写紙用スチルト材を提供す
ることに娶る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stilt material for pressure-sensitive copying paper, which is made of bias-loose cornstarch and has a particle size of 3 to 10 μm.
The object is to provide a stilt material for pressure-sensitive copying paper that has high performance and excellent heat resistance, is easy to manufacture, and is inexpensive.
感圧複写紙はワックスカーボン紙に代わる複写記録の方
式として開発されて以来、その便利さ等から事務処理の
合理化にマツチし、急速に普及した。Since pressure-sensitive copying paper was developed as a method of copying and recording to replace wax carbon paper, it has rapidly become popular as it is convenient and suitable for streamlining office processing.
感圧記録紙は三枚の紙の組合せよシなり、最上段の紙の
裏面KFi無色のロイコ染料という発色剤を溶解させた
オイルを含む3〜15μのマイクロカプセルとカプセル
よシも若干粒径が大きい澱粉やセルロースの微粉末等よ
シなるスチルト材との混合物が、バインダーと共に均一
に塗布されている。Pressure-sensitive recording paper is made up of three sheets of paper, and the back side of the top paper contains microcapsules of 3 to 15μ containing an oil in which a coloring agent called KFi colorless leuco dye is dissolved, and the capsules also have a slightly smaller particle size. A mixture of other stilt materials, such as starch with a large grain size or finely powdered cellulose, is uniformly applied along with a binder.
中層の紙Fi表面にロイコ染料溶液と接触してこれを発
色させる顕色剤と5〜20μの酸性白土や油溶性の7エ
ノール樹脂等の顕色剤粒子との混合物がラテックスや水
溶性高分子のバインダーと共に均一に塗布されておシ、
また、その裏面は最上層の紙と同様にマイクロカプセル
が塗布されている。A mixture of a color developer that develops color by contacting a leuco dye solution on the surface of the paper Fi in the middle layer, and color developer particles such as acid clay or oil-soluble 7-enol resin of 5 to 20μ is used as latex or water-soluble polymer. It is evenly applied with the binder of
Also, the back side of the paper is coated with microcapsules, similar to the top layer of paper.
下層の紙は中層の紙の表面と同様に顕色剤が塗布されて
いる。The lower layer paper is coated with a color developer in the same way as the surface of the middle layer paper.
感圧記録紙の発色機構のポイントは発色剤および発色剤
を包含するマイクロカプセルとこれを発色させる顕色剤
層にあることは言うまでもないが、この発色機構をよシ
効果的に出現させるためにはマイクロカプセルを保持す
るスチルト材と顕色剤を保持する顕色剤粒子の性質が重
要でらる。Needless to say, the key to the coloring mechanism of pressure-sensitive recording paper lies in the coloring agent, the microcapsules containing the coloring agent, and the coloring agent layer that develops the coloring agent, but in order to make this coloring mechanism appear more effectively, The properties of the stilt material that holds the microcapsules and the developer particles that hold the color developer are important.
特にスチルト材の粒子の大きさ、形状、粒子表面の物性
、吸水性、吸油性、耐熱性等の物理的、化学的性質は発
色性能に大きな影響を与える。In particular, the physical and chemical properties of the particles of the stilt material, such as the size, shape, physical properties of the particle surface, water absorption, oil absorption, and heat resistance, greatly affect the coloring performance.
現在、一般的に用いられている感圧複写紙のスチルト材
は、例、t#i特公昭47−1178号に述べられてい
るように小麦澱粉等の未処理#扮を主体とするものでお
る。Currently, the stilt material for pressure-sensitive copying paper that is commonly used is mainly made of untreated # material such as wheat starch, as described in, for example, t#i Special Publication No. 1178/1983. is.
感圧複写紙は近年プンビエーターの開発やそれと通信回
線の連結によるオンラインシステムの普及等によりその
用途と使用量が年々増大して−る。The use and amount of pressure-sensitive copying paper used has been increasing year by year due to the recent development of pressurizers and the spread of on-line systems that connect them to communication lines.
これに伴い感圧複写紙の性能に対する′9望は益々高度
化し、かつ多様化している。Along with this, expectations regarding the performance of pressure-sensitive copying paper have become increasingly sophisticated and diversified.
その一つが耐熱性感圧複写紙の需要増大である。One of these is the increasing demand for heat-resistant pressure-sensitive copying paper.
感圧複写紙における耐熱性は製造面と使用面の両面から
必要とされている。Heat resistance in pressure-sensitive copying paper is required from both the manufacturing and usage standpoints.
製造向において耐熱性が必要な理由の一つitマイクロ
カプセルとスチルト材お上びノ(インダーを原紙へ塗布
後、乾燥接着する工程で熱の使用が制限されることに伴
う性能と生産性の低下を改善するためでおる。One of the reasons why heat resistance is necessary in manufacturing is because of the limited use of heat in the process of applying the inder to the base paper and drying it, resulting in poor performance and productivity. This is to improve the decline.
使用面において耐熱性が必要な理由は感圧複写紙を束ね
てノート状にしたシ、複写後郵送等の必軟上刺画したり
する際にホットメルト接着剤を使用するが、この接着剤
が受ける熱による感圧複写紙の汚染を防止するためであ
る。The reason for the need for heat resistance in terms of use is that hot melt adhesives are used when bundling pressure-sensitive copying paper into notebooks, and when printing and embroidering after copying and mailing. This is to prevent the pressure-sensitive copying paper from being contaminated by the heat it receives.
このような費望から、まず耐熱性のマイクロカプセルの
開発が行われ(例えば、特公昭49−45155号)、
次いで耐熱性感圧紙の!Am方法の開発が進められてい
る(例えば、特公昭49−26848号)。Due to these demands, heat-resistant microcapsules were first developed (for example, Japanese Patent Publication No. 49-45155).
Next is heat-resistant pressure-sensitive paper! Development of the Am method is underway (for example, Japanese Patent Publication No. 49-26848).
その結果1発色剤を包含するマイクロカプセルは熱に弱
いゼラチンから熱に強い合成高分子を材質とする耐熱性
のマイクロカプセルへと移行した。As a result, the microcapsules containing a color former were changed from heat-resistant gelatin to heat-resistant microcapsules made of heat-resistant synthetic polymer.
しかし、七の耐熱性のマイクロカプセルを保持する耐熱
性のスチルト材の開発が遅れ、未だ前記の問題点は完全
IcU解決されていない。However, the development of a heat-resistant stilt material that holds heat-resistant microcapsules has been delayed, and the above-mentioned problems have not yet been completely solved.
さらに、近年多数枚セットされた感圧複写紙を高速かつ
高感度で鮮明に複写する必要性が高まり、マイクロカプ
セルの粒径を小さくする等の対応策が採られ、これと共
にスチルト材の性能が再g識され、高性能でしかも耐熱
性のある澱粉系スチルト材の開発か切望されている。Furthermore, in recent years there has been an increasing need for high-speed, high-sensitivity, and clear copying of pressure-sensitive copying paper set in large numbers, and countermeasures such as reducing the particle size of microcapsules have been taken, and along with this, the performance of stilt materials has improved. The development of starch-based stilt materials with high performance and heat resistance is now in great demand.
本発明者らは、このような状況rc/iiみ、高性能で
耐熱性に優れ、しかも製法が容易で安価な1)Il+粉
系スチルト材を開発すべく、鋭意研究した結果、粒径が
3〜10μのノ)イアミロースコーンスターチがこの目
的にかなうことを見出し、本発明を完成した。Considering these circumstances, the inventors of the present invention conducted extensive research to develop 1) Il+ powder-based stilt material that has high performance, excellent heat resistance, is easy to manufacture, and is inexpensive. The present invention was completed based on the discovery that 3 to 10 μm of iaamylose cornstarch satisfies this purpose.
すなわち1本発明はアミロース含iが50%以上のノ)
イアiロースコーンスターチから分級法により分割して
得られ九粒径が6〜10μの/\イアミロースコーンス
ターチを構成成分とする感圧複写紙用耐熱性スチルト材
である。That is, 1) the present invention has an amylose content of 50% or more)
This is a heat-resistant stilt material for pressure-sensitive copying paper, which is obtained by dividing I-I loin cornstarch by a classification method and has a particle size of 6 to 10 μm.
スチルト材の選択に当ってはマイクロカプセルの粒径に
合わせ、使用する澱粉のai類を選んでいる。When selecting the stilt material, the AI type of starch to be used is selected according to the particle size of the microcapsules.
澱粉の中で粒径が一番小さい米澱粉は粒子の形が球状で
なくサイコロ状のため、流動性が悪いばかりか粒が壊れ
易く、シかも高価であることからこの目的には適してi
ない。Rice starch, which has the smallest particle size among starches, is not suitable for this purpose because its particles are not spherical but dice-shaped, so it not only has poor fluidity but also breaks easily and is expensive.
do not have.
本発明者らはスチルト材として用いられている澱粉の性
状を徹底的に検討し、耐熱性のスチルト材には耐熱性の
澱粉の使用が必智であることを明らかにした。The present inventors have thoroughly investigated the properties of starch used as stilt material, and have clarified that it is essential to use heat-resistant starch for heat-resistant stilt material.
耐熱性の澱粉とは加熱しても産湯や糊化を起こし措く、
かつ、澱粉粒が壊れ難い澱粉のことでめる。Heat-resistant starch does not cause starch or gelatinization even when heated.
It also refers to starch whose starch granules are difficult to break.
澱粉を耐熱性にする方法としては架橋したり、合成樹脂
等でコーティングしたりして不溶性にする方法が知られ
ている。Known methods for making starch heat resistant include crosslinking it or coating it with a synthetic resin or the like to make it insoluble.
しかし、このような処理を行うとm扮の表面に傷がつき
、粒が壊れ易くなるばかりか、吸水性や吸油性が増して
澱粉粒の流動性が損なわれたシ、また、澱粉の表面構造
が合成樹脂様になる等、天然fa扮の本来の長nrが失
なわれてしまうため好ましくない。However, such treatment not only scratches the surface of the starch grains and makes them more likely to break, but also increases the water absorption and oil absorption properties, impairing the fluidity of the starch grains. This is not preferable because the structure becomes synthetic resin-like and the original length nr of natural fa is lost.
本発明者らは、バイアずは一スとうもろこしから通常の
ウェットミリングでつくられるアミロース含量50%以
上のハイアミロースコーンスターチが、このような#扮
の加工処理を行わずとも高い糊化温度を有する点に着目
し、この澱粉粒の性状を分析した結果、ノ〜イアミロー
スコーンスターチに50X程度存在する粒径3〜10μ
の#粉粒は形が球状で流動性に優れてiるはかシか、粒
が壊れ難く、かつ、糊化温度が特に高い(93℃前後)
こと、およびハイアミロースコーンスターチでも粒径が
10μ以上の澱粉粒は粒の形が角ぼっておシ、流動性が
悪いばかりか粒が壊れ易く、シかも糊化温度が低い(8
3℃前後)こと等の知見を得、このハイアミロースコー
ンスターチから粒径6〜10μの区分を分級法で分割し
て得られる澱粉粒は耐熱性に優れていることを見出し友
。The present inventors have discovered that high amylose corn starch with an amylose content of 50% or more, which is produced from Beazuhachisu corn by normal wet milling, has a high gelatinization temperature without such processing. As a result of analyzing the properties of this starch granule, it was found that the particle size is 3 to 10μ, which is about 50X in non-amylose cornstarch.
The powder grains are spherical in shape and have excellent fluidity, making them difficult to break and having a particularly high gelatinization temperature (around 93°C).
In addition, even with high amylose cornstarch, starch granules with a particle size of 10μ or more have a square shape, have poor flowability, are easily broken, and have a low gelatinization temperature (8
He discovered that starch granules obtained by dividing this high amylose corn starch into particles with a particle size of 6 to 10 microns using a classification method have excellent heat resistance.
まえ、この澱粉粒の分割によりて副生する残りIl!1
F+0馨のバイアずロースコーンスターチは食品用途へ
の適性が向上し、その結果この処理を行っても大幅なコ
ストアップにはならな−ととも判明した。First, the remaining Il is produced as a by-product by dividing the starch grains! 1
It was also found that F+0 Kaoru's Baiazu loin corn starch has improved suitability for food applications, and as a result, this treatment does not result in a significant increase in cost.
このような理由から本発明はハイアミロースコーンスタ
ーチから分級法により分割して得九粒径が3〜10μの
ハイアゼロースコーンスターチを使用することを必賛不
町欠な構成要件とするものであり、これによって初めて
感圧複写紙のかかえる問題点を解決し得たものでめる。For these reasons, the present invention requires the use of high azerose corn starch obtained by dividing high amylose corn starch by a classification method and having a particle size of 3 to 10 microns. This was the first time that we were able to solve the problems faced by pressure-sensitive copying paper.
コノ際、ハイアミロースコーンスターチの大粒子澱粉を
粉砕して使用することも考えられるが、粒径が10μ以
上の大粒子澱粉はこれを粉砕して粒径を6〜10μにし
ても糊化温度が低く、また粉砕した澱粉粒の形が球状と
ならず、流動性が悪く、かつ、粒が壊れ易いこと等から
本発明の目的を達成することはできない。In this case, it is possible to use pulverized large-particle starch of high amylose corn starch, but large-particle starch with a particle size of 10μ or more can be crushed to a particle size of 6 to 10μ without gelatinization temperature. The object of the present invention cannot be achieved because the starch grains are low, the shape of the crushed starch grains is not spherical, the fluidity is poor, and the grains are easily broken.
本発明の感熱複写紙用耐熱性スチルト材を使用すれば、
■ 感圧複写紙製造において使用する熱の制限が従来の
50℃から90℃まで高めることができる。If the heat-resistant stilt material for thermal copying paper of the present invention is used,
(2) The heat limit used in the production of pressure-sensitive copying paper can be increased from the conventional 50°C to 90°C.
■ 感圧複写紙に耐熱性が付与されるためホットメルト
接着剤使用時の熱による汚染が防止できる。■ Heat resistance is imparted to pressure-sensitive copying paper, which prevents contamination caused by heat when using hot melt adhesives.
■ マイクロカプセルの粒の小径化に対応できる小粒子
のスチルト材でおるため、その粒の性状から高速、高性
能複写が可能となる。■ Because it is made of small-particle stilt material that can accommodate the reduction in the particle size of microcapsules, high-speed, high-performance copying is possible due to the properties of the particles.
■ 吸油性が小さいため顕色剤層の顕色剤が移行しない
。■ Due to low oil absorption, the color developer in the color developer layer does not migrate.
また、吸水性が小さいため耐湿性の点で問題が生じない
。In addition, since the water absorption is small, no problem arises in terms of moisture resistance.
■ 安価でしかも量的な供給が可能であるため低価格の
感圧複写紙を提供できる。■ Low-cost pressure-sensitive copying paper can be provided because it is inexpensive and can be supplied in large quantities.
等の効果を奏する。It has the following effects.
次に本発明の実施例を示す。Next, examples of the present invention will be shown.
実施例1゜
ジインプルピルビフェニル40部と塩素化度20重量%
、炭素数14の塩素化ノルマルパラフィン10部に3−
ジエチルアくノー7−ジベンジルアミノフル第2ン4部
を溶解し、これにトルイレンジインシアナート10部、
ビスフェノール人6部、オクチル酸鉛α5部及びメチレ
ンクロライド20部からなる溶液を混和し、−次溶液を
つくった。Example 1 40 parts of diimpurpyrubiphenyl and chlorination degree of 20% by weight
, 3- to 10 parts of chlorinated normal paraffin having 14 carbon atoms
Dissolve 4 parts of diethyl alcohol, 7-dibenzylaminofuran, 10 parts of toluylene diincyanate,
A solution consisting of 6 parts of bisphenol, 5 parts of lead alpha octylate, and 20 parts of methylene chloride was mixed to prepare a -2 solution.
アラビアゴム10部を30℃の永40部に溶解し、これ
に前記の一次溶液を加えホモジナイザーを用いて乳化し
て直径6〜10μの水中油滴塵エマルジョンをつくった
。10 parts of gum arabic was dissolved in 40 parts of water at 30 DEG C., and the above primary solution was added thereto and emulsified using a homogenizer to form an oil-in-water dust emulsion having a diameter of 6 to 10 microns.
50℃の温水40部に前記エマルジョンを注ぎ攪拌しつ
つ系の温度を80℃に上昇させ、この温度に30分間保
ち、カプセルを形成させた。The emulsion was poured into 40 parts of hot water at 50°C, and the temperature of the system was raised to 80°C while stirring, and this temperature was maintained for 30 minutes to form capsules.
一方、アミロース含量70%のハイアミロースコーンス
ターチを空気分級機(日清エンジニアリングKK製、T
o−4ONW機)を使用して分級し、粒径10μを境に
して2分割し、粒径が10μより細かい澱粉粒のハイア
ミロースコーンスターチを得た。この体積平均径は&2
μでありた。On the other hand, high amylose cornstarch with an amylose content of 70% was processed using an air classifier (manufactured by Nisshin Engineering KK, T
o-4ONW machine) and divided into two parts with a grain size of 10μ as a boundary to obtain high amylose cornstarch in the form of starch granules with a grain size smaller than 10μ. This volume average diameter is &2
It was μ.
このハイアミロースコーンスターチをスチルト材として
前記のカプセル液に10部添加した。10 parts of this high amylose cornstarch was added as a stilt material to the capsule liquid.
得られたカプセル液の固形分は51%であった。The solid content of the obtained capsule liquid was 51%.
このカプセル液に増粘前として5%アルギン酸ソーダ水
溶液10部を添加、混合した。10 parts of a 5% sodium alginate aqueous solution was added to and mixed with the capsule liquid before thickening.
このカプセル液を複写紙に塗布115ffldとなるよ
うにロールコートし、その後乾燥して感圧複写紙を得た
。This capsule liquid was roll-coated onto copy paper to a thickness of 115 ffld, and then dried to obtain pressure-sensitive copy paper.
なお、対照例として、スチルト材に、実施例1における
ハイアミロースコーンスターチの代ゎシに粒径が2〜3
5μの小麦澱粉を使用し、その他は実施例1と同様にし
て感圧複写紙を製造した。In addition, as a control example, instead of the high amylose cornstarch in Example 1, a particle size of 2 to 3 was added to the stilt material.
Pressure-sensitive copying paper was produced in the same manner as in Example 1 except that 5μ wheat starch was used.
これら実施例および対照例による感圧複写紙の生産性な
らびに性能を次表に示す。The productivity and performance of pressure-sensitive copying paper according to these Examples and Control Examples are shown in the following table.
以上の結果から明らがなように5本発明の耐4)性スチ
ルト材を使用すれば、感圧複写紙の生産性および性能を
大幅に改善することができる。As is clear from the above results, the productivity and performance of pressure-sensitive copying paper can be greatly improved by using the durable stilt material of the present invention.
特許出願人:豊年製油株式会社Patent applicant: Hoenen Oil Co., Ltd.
Claims (2)
μのハイアミロースコーンスターチよりなる感圧複写紙
用耐熱性スチルト材。(1) Amicus content of 50% or more and particle size of 3 to 10
A heat-resistant stilt material for pressure-sensitive copying paper made of μ high amylose cornstarch.
チが分級法によシ分割して得られた澱粉粒である特許請
求の範囲第1項記載の感圧複写紙用耐熱性スチルト材。(2) The heat-resistant stilt material for pressure-sensitive copying paper according to claim 1, which is starch granules obtained by dividing high amylose cornstarch having a particle size of 3 to 10 μm by a classification method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59001724A JPS60145881A (en) | 1984-01-09 | 1984-01-09 | Heat-resistant stilt material for pressure-sensitive copying paper |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59001724A JPS60145881A (en) | 1984-01-09 | 1984-01-09 | Heat-resistant stilt material for pressure-sensitive copying paper |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS60145881A true JPS60145881A (en) | 1985-08-01 |
Family
ID=11509508
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP59001724A Pending JPS60145881A (en) | 1984-01-09 | 1984-01-09 | Heat-resistant stilt material for pressure-sensitive copying paper |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60145881A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4797385A (en) * | 1986-01-24 | 1989-01-10 | Fuji Photo Film Co., Ltd. | Heat-sensitive recording material |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49118783A (en) * | 1973-03-01 | 1974-11-13 | ||
JPS5429206A (en) * | 1977-08-04 | 1979-03-05 | Staley Mfg Co A E | Largeediameter starch grain protective substance for coating pressureesensitive microcapsule |
JPS5892591A (en) * | 1981-11-30 | 1983-06-01 | Kanzaki Paper Mfg Co Ltd | Pressure sensitive material |
-
1984
- 1984-01-09 JP JP59001724A patent/JPS60145881A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49118783A (en) * | 1973-03-01 | 1974-11-13 | ||
JPS5429206A (en) * | 1977-08-04 | 1979-03-05 | Staley Mfg Co A E | Largeediameter starch grain protective substance for coating pressureesensitive microcapsule |
JPS5892591A (en) * | 1981-11-30 | 1983-06-01 | Kanzaki Paper Mfg Co Ltd | Pressure sensitive material |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4797385A (en) * | 1986-01-24 | 1989-01-10 | Fuji Photo Film Co., Ltd. | Heat-sensitive recording material |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2655453A (en) | Manifold sheet having a crushresistant transfer film | |
US4010038A (en) | Process for producing microcapsules | |
EP0823439B1 (en) | Improvements in or relating to agglomeration of starch | |
AU595222B2 (en) | A gelatin having highly improved properties of wettability and dispersibility | |
US2327828A (en) | Colloidal carbon antihalation layer | |
US3108009A (en) | Process coating a substrate with an opaque coating and resultant article | |
Ghebre-Sellassie et al. | Evaluation of a high-speed pelletization process and equipment | |
JPS5826365B2 (en) | Production method of zinc-modified phenol-aldevido novolac resin | |
JPS6354175B2 (en) | ||
US4046404A (en) | Carbonless paper for use in electrostatographic copiers | |
US3934069A (en) | Non-smudging pressure-sensitive copying material | |
JPS59501367A (en) | Vinyl acetate copolymers, latex copolymers containing them and their uses | |
Nachtergaele et al. | Starch as stilt material in carbonless copy paper‐new developments | |
JPS60145881A (en) | Heat-resistant stilt material for pressure-sensitive copying paper | |
EP0070841B1 (en) | Dry toner and method of making same | |
JPH0216080A (en) | No-carbon paper capable of being printed by electrostatic process copying machine | |
US3900671A (en) | Capsule-carrying sheets or webs | |
US2337459A (en) | Method of sizing paper with starch | |
JPH0114037B2 (en) | ||
US3155511A (en) | Precoated diazo reproduction paper | |
JPH0326151B2 (en) | ||
JPS5892591A (en) | Pressure sensitive material | |
JPS59111671A (en) | Printing method by magnetography, printing paper and document made by printing on said printing paper | |
US3431106A (en) | Photoconductive zinc oxide coating compositions and method of producing them | |
CN114196259B (en) | Microcapsule pigment particle special for thermosensitive erasable pen ink and preparation method thereof |