JPH07214042A - Method for recycling waste washing liquid of printing unit - Google Patents
Method for recycling waste washing liquid of printing unitInfo
- Publication number
- JPH07214042A JPH07214042A JP2887994A JP2887994A JPH07214042A JP H07214042 A JPH07214042 A JP H07214042A JP 2887994 A JP2887994 A JP 2887994A JP 2887994 A JP2887994 A JP 2887994A JP H07214042 A JPH07214042 A JP H07214042A
- Authority
- JP
- Japan
- Prior art keywords
- ink
- printing unit
- printing
- waste liquid
- washing liquid
- 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 59
- 239000002699 waste material Substances 0.000 title claims abstract description 58
- 238000007639 printing Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims description 8
- 238000004064 recycling Methods 0.000 title claims description 3
- 238000005406 washing Methods 0.000 title abstract description 13
- 239000002904 solvent Substances 0.000 claims abstract description 16
- 238000004140 cleaning Methods 0.000 claims description 27
- 238000011084 recovery Methods 0.000 claims description 14
- 239000012459 cleaning agent Substances 0.000 claims description 8
- 239000003599 detergent Substances 0.000 abstract 1
- 230000002265 prevention Effects 0.000 abstract 1
- 239000003086 colorant Substances 0.000 description 11
- COHYTHOBJLSHDF-UHFFFAOYSA-N indigo powder Natural products N1C2=CC=CC=C2C(=O)C1=C1C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-UHFFFAOYSA-N 0.000 description 9
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 8
- 238000003860 storage Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 description 5
- 238000007774 anilox coating Methods 0.000 description 4
- 244000025254 Cannabis sativa Species 0.000 description 3
- 235000000177 Indigofera tinctoria Nutrition 0.000 description 3
- 229940097275 indigo Drugs 0.000 description 3
- 241000234282 Allium Species 0.000 description 2
- 235000002732 Allium cepa var. cepa Nutrition 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 235000013799 ultramarine blue Nutrition 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- 238000007646 gravure printing Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- RFKJHQXSLBUONF-UHFFFAOYSA-N methyl blue free acid Chemical compound C1=CC(S(=O)(=O)O)=CC=C1NC1=CC=C(C(=C2C=CC(C=C2)=NC=2C=CC(=CC=2)S(O)(=O)=O)C=2C=CC(NC=3C=CC(=CC=3)S(O)(=O)=O)=CC=2)C=C1 RFKJHQXSLBUONF-UHFFFAOYSA-N 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Landscapes
- Cleaning By Liquid Or Steam (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は印刷に際して色替え
時，又は印刷終了時に発生する印刷ユニットの洗浄廃液
を利用して再生インキを得ることを目的とした発明であ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended to obtain a recycled ink by utilizing a cleaning waste liquid of a printing unit which is generated at the time of color change or at the end of printing during printing.
【０００２】[0002]
【従来の技術】従来，インキの洗浄廃液は産業廃棄物と
して処理されている。燃える有機溶剤をインキビヒクル
の溶媒の主成分とするインキ廃液は焼却処理により，燃
えない水を主成分とする水性インキの廃液は，一旦廃水
処理を行った後瀘過され，処理水とスラッジに分別され
る。何れの場合にも印刷ユニットの洗浄廃液は，燃える
ゴミと燃えないゴミを発生し，その処理には専門の処理
業者が当たっているが，手間と費用がかかり，又公害発
生の原因ともなっている。2. Description of the Related Art Conventionally, ink cleaning waste liquid is treated as industrial waste. Ink waste liquid containing a burning organic solvent as the main solvent of the ink vehicle is incinerated, and the waste liquid of water-based ink containing non-burnable water as a main component is filtered once after the waste water treatment, and is treated as treated water and sludge. Be separated. In either case, the cleaning waste liquid of the printing unit produces burnable dust and non-burnable dust, which are handled by a professional processor, but they are time-consuming, costly, and cause pollution. .
【０００３】[0003]
【発明が解決しようとする課題】上記のような，従来の
印刷インキ廃液の処理に関して，本願発明者等は「イン
キビヒクルの溶媒として，グリコ−ル類及び水を使用し
て印刷する場合の洗浄廃液の回収再利用」に関する発明
を完成し，特許出願（平成５年特許願第９６９９４号）
したものであるが，この場合も，従来の印刷機の印刷ユ
ニットのように洗浄廃液は，１ケ所の廃液貯蔵槽に流入
するために，各種の色が混合して廃液は黒味を帯びた茶
褐色に着色するのが普通である。従って，従来のように
廃液の受理槽が１槽である場合には洗浄廃液から色の鮮
明な赤，黄，草，群青などの色を得ることは不可能であ
った。Regarding the conventional treatment of the printing ink waste liquid as described above, the inventors of the present application said, "Washing when printing using glycols and water as the solvent of the ink vehicle. Completed an invention related to “collection and reuse of waste liquid” and applied for a patent (1993 patent application No. 96994)
In this case as well, in this case, as in the printing unit of a conventional printing machine, the cleaning waste liquid flows into one waste liquid storage tank, so various colors are mixed and the waste liquid becomes blackish. It is usually colored dark brown. Therefore, it is impossible to obtain clear colors such as red, yellow, grass, and ultramarine blue from the cleaning waste liquid when there is only one waste liquid receiving tank as in the conventional case.
【０００４】更に，従来の印刷機の洗浄は，印刷機の洗
浄のみを目的とする為に，洗浄用溶剤は残渣の溶解性
と，洗浄コストのみが計られ，廃液の回収再利用等は考
慮されていなかった。本発明は，上記のような従来の洗
浄方法の欠点を解決して，洗浄廃液を有効利用し，廃液
の処理，公害防止等に役立つ方法を目的としこれを完成
したものである。Further, since the conventional cleaning of the printing machine is intended only for cleaning the printing machine, only the solubility of the residue in the cleaning solvent and the cleaning cost are measured, and the recovery and reuse of the waste liquid is considered. Was not done. The present invention has been completed with the object of solving the above-mentioned drawbacks of the conventional cleaning method, and effectively utilizing the cleaning waste liquid to treat the waste liquid and prevent pollution.
【０００５】[0005]
【課題を解決するための手段】本願発明者等は，洗浄廃
液の色の混合を防止する為に，各印刷ユニットの下部に
複数の廃液貯蔵槽を設置して，印刷に使用したインキの
それぞれの色相に応じて洗浄廃液を切り換えて流入させ
る方法を発明した。廃液貯蔵槽の数を多くすればそれだ
け単色に近い廃液を得ることが出来るが，余り多く設置
すると機構上繁雑になる為１印刷ユニット当り２〜６槽
の設置が望ましい。印刷インキに使用される色相は通常
１８色〜５２色程度であるが，特色を入れると１００色
を超える場合もあり，色相の数を一概に限定することは
出来ない。然し，基本となるベ−スインキの色は数色で
あり，中間色のベ−スインキを加えても２０色以内に限
定される。一例としてこれを大きく分類すると，赤，オ
レンジ，黄、草，浅葱，群青，藍，紺藍，紫，茶，白，
黒などである。The inventors of the present application installed a plurality of waste liquid storage tanks at the bottom of each printing unit in order to prevent mixing of the colors of the cleaning waste liquids. Has invented a method of switching and inflowing the cleaning waste liquid according to the hue. If the number of waste liquid storage tanks is increased, it is possible to obtain a waste liquid close to a single color. However, if too many waste liquid storage tanks are used, the mechanism becomes complicated. Therefore, it is desirable to install 2 to 6 tanks per printing unit. The hue used for printing ink is usually about 18 to 52 colors, but when special colors are added, it may exceed 100 colors, and the number of hues cannot be unconditionally limited. However, the basic color of the base ink is several colors, and even if the intermediate color base ink is added, it is limited to within 20 colors. As an example, if you roughly classify this, red, orange, yellow, grass, Asagi, ultramarine, indigo, navy blue, purple, brown, white
For example, black.
【０００６】一方，印刷機には単色機は少なく，殆どの
機械は２〜６色機であるが，このうちで２色機が最も多
く使用されている。各印刷ユニットは出来るだけ同系統
の色を使用するのが普通である。例えば２色機の場合，
１色目で赤，オレンジ，黄，２色目で浅葱，群青，藍，
紺藍，黒などである。本願発明では各印刷ユニット毎に
複数の廃液貯蔵槽を設置するのである。例えば，２色機
の各印刷ユニットに５槽づつの貯蔵槽を設置した場合に
は，洗浄廃液の貯蔵を次のように行う。On the other hand, there are few monochromatic printers as printing machines, and most of the machines are 2 to 6 color printers, but of these, 2 color printers are most often used. It is normal for each printing unit to use the same color as possible. For example, in the case of a two-color machine,
The first color is red, orange, yellow, the second color is onion, ultramarine, indigo,
Indigo blue, black, etc. In the present invention, a plurality of waste liquid storage tanks are installed for each printing unit. For example, when five storage tanks are installed in each printing unit of a two-color machine, the cleaning waste liquid is stored as follows.
【０００７】１色目の１槽は赤系，２槽はオレンジ系，
３槽は黄系，４槽は草系，５槽はその他の色，２色目の
１槽は浅葱系，２槽は群青系，３槽は紺藍系，４槽は紫
系，５槽は黒及びその他の色とする。勿論，各貯蔵槽に
はそれぞれの色系統の複数の色の廃液が流入するが，ベ
−スインキに使用されている色素の数が限定されている
為に，同系統の廃液から実用的な色相のインキを再生す
ることが可能になる。The first tank of the first color is red, the second tank is orange,
3 tanks are yellow, 4 tanks are grass, 5 tanks are other colors, 2 tanks of 1st color are green onion, 2 tanks are ultramarine blue, 3 tanks are dark blue, 4 tanks are purple, 5 tanks are Black and other colors. Of course, waste liquid of multiple colors of each color system flows into each storage tank, but because the number of dyes used in the base ink is limited, a practical hue from the waste liquid of the same system is used. It becomes possible to recycle the ink.
【０００８】又，従来の印刷ユニットの洗浄には廃液の
再利用が考慮されていない為に，洗浄剤のコストと作業
性のみが考慮されていたが，本願発明において使用する
洗浄剤は，当概印刷ユニットに使用されているインキビ
ヒクルの溶媒と同じ組成の溶媒を使用することによって
廃液の再利用を可能としたものである。In addition, since the conventional cleaning of the printing unit does not consider the reuse of the waste liquid, only the cost and workability of the cleaning agent have been considered. However, the cleaning agent used in the present invention is The waste liquid can be reused by using a solvent having the same composition as the solvent of the ink vehicle used in the printing unit.
【０００９】再生インキを得る為には，当概廃液と補正
用インキを使用する。補正用インキは当概印刷ユニット
に使用したインキのインキビヒクルの溶媒成分を減少さ
せたインキである。溶媒成分を出来るだけ多く減少させ
たインキ程廃液の混合比率を増加させることが出来る為
に効果的であるが，余り多く減少させるとインキの流動
性が悪くなる。In order to obtain a recycled ink, a waste liquid and a correction ink are generally used. The correction ink is an ink in which the solvent component of the ink vehicle of the ink used in the printing unit is reduced. It is effective that the amount of solvent component is decreased as much as possible because the mixing ratio of the waste liquid can be increased, but if it is decreased too much, the fluidity of the ink deteriorates.
【００１０】初めからインキ専用の溶剤を多量に混合し
て使用するインキの場合には，補正インキを使用せず
に，当概廃液を専用の溶剤に替えて使用することも出来
る。この方法は，オフセット印刷やグラビヤ印刷にも利
用することが出来る。次に、特殊グリコ−ル型インキと
フレキソ２色機を使用した実施例によって，本願発明を
説明するが，本願発明はこの実施例のみによって限定さ
れるものではない。In the case of an ink in which a large amount of solvent for exclusive use of ink is mixed from the beginning, the waste liquid can be replaced with a special solvent without using the correction ink. This method can also be used for offset printing and gravure printing. Next, the invention of the present application will be described with reference to an example using a special glycol type ink and a flexo dichroic machine, but the invention of the present application is not limited to this example.
【００１１】[0011]
【実施例】ゴムロ−ルとアニロックスロ−ルの両端を遮
蔽して，インキの溢流防止を施したフレキソ２色印刷機
の１色目の印刷ユニットに図１に示すような洗浄廃液回
収槽１〜５を設け，初めに回収槽１のバルブを開放し，
回収槽２〜５のバルブは閉鎖する。温度２０℃，湿度６
５％の屋内条件下で，上記印刷機のゴムロ−ルとアニロ
ックスロ−ルの間に，インキヒビクル中のエチレングリ
コ−ルと水の比率が７０対３０である赤インキ（大阪印
刷インキ製造株式会社製，エクシ−ド ０３０赤）を４
００ｇ加えて約１０分空転した後，段ボ−ルシ−ト（表
面に十条Ｃ，２００ｇライナ−を使用）を１００枚印刷
した。EXAMPLE A cleaning waste liquid recovery tank 1 as shown in FIG. 1 is provided in a first-color printing unit of a flexo two-color printing machine in which both ends of a rubber roll and anilox roll are shielded to prevent ink overflow. ~ 5, first open the valve of the recovery tank 1,
The valves of the recovery tanks 2-5 are closed. Temperature 20 ℃, Humidity 6
Under 5% indoor condition, between the rubber roll and the anilox roll of the above printing machine, a red ink having a ratio of ethylene glycol to water in the ink vehicle of 70:30 (Osaka Printing Ink Manufacturing Co., Ltd.) Made, Exceed 030 Red) 4
After adding 100 g and spinning for about 10 minutes, 100 sheets of corrugated ball sheet (using a 10 g C, 200 g liner on the surface) were printed.
【００１２】印刷後，２本ロ−ル間に残ったインキを吸
引によって回収した後，エチレングリコ−ルと水の比率
が７０対３０からなるインキ洗浄剤を約２００ｇ加えて
印刷機を約３０秒空転した後，アニロックスロ−ルにド
クタ−ブレ−ドを当ててロ−ルに付着したインキと洗浄
剤の混合液（インキ洗浄廃液）をかき取ることによって
２本のロ−ルを洗浄した。この場合に生じた洗浄廃液
は，ドクタ−ブレ−ドの下部に設置された受け皿を通り
回収槽１に流入した。After printing, the ink remaining between the two rolls was collected by suction, and then about 200 g of an ink cleaning agent having a ratio of ethylene glycol to water of 30:30 was added to the printing machine to about 30. After spinning for 2 seconds, a doctor blade was applied to the anilox roll to scrape the mixed liquid of ink and cleaning agent (ink cleaning waste liquid) adhering to the roll to wash the two rolls. . The cleaning waste liquid generated in this case flowed into the recovery tank 1 through the tray installed at the lower part of the doctor blade.
【００１３】２色目の印刷ユニットにも１色目と同様に
インキ洗浄廃液の回収槽１〜５を設け，初めに回収槽４
のバルブを開放し，その他のバルブは閉鎖する。インキ
ビヒクル中の溶媒の比率が，上記インキと同じの紺藍イ
ンキ（大阪印刷インキ製造株式会社製，エクシ−ド１７
０紺藍）を２色目の印刷ユニットのロ−ル間に加えて段
ボ−ルシ−トに印刷し，残りのインキを回収した後，１
色目と同じ洗浄剤を使用してロ−ルを洗浄し，洗浄廃液
を回収槽４に流入させた。Similarly to the first color, the second color printing unit is also provided with recovery tanks 1 to 5 for the ink cleaning waste liquid.
Open the valve of and close the other valves. Ink blue ink with the same solvent ratio in the ink vehicle as above (Osaka Printing Ink Mfg. Co., Ltd.
0 navy blue) was added between the rolls of the second color printing unit to print on the corrugated ball sheet, and the remaining ink was collected.
The roll was washed using the same cleaning agent as for the color, and the waste washing liquid was allowed to flow into the recovery tank 4.
【００１４】同様の操作を繰り返して，１色目の回収槽
１に０３０赤と同系統の色相であるエクシ−ド０３２
赤，同０３４赤の洗浄廃液を流入させた。又２色目の回
収槽４にはエクシ−ド１７１紺藍，同１８１紺藍の洗浄
廃液を流入させた。By repeating the same operation, in the recovery tank 1 for the first color, an exceeding 032 which is a hue of the same system as 030 red.
The washing waste liquids of red and 034 red were introduced. In addition, the washing waste liquid of the extruded 171 and 181 indigo blue was introduced into the second color recovery tank 4.
【００１５】次に、エクシ−ド０３０赤のインキ中の溶
媒成分の１／２を使用した補正用インキ０３０赤Ｆをデ
スパ−攪拌機によって製造し，１色目の回収槽１で得た
洗浄廃液５０に対して０３０赤Ｆを５０加えて再生イン
キ０３０赤Ｇを製造した。同印刷機の印刷ユニットを洗
浄した後，再生インキ０３０赤Ｇを使用して段ボ−ルに
印刷したところ，得られた印刷物は初めの標準インキで
あるエクシ−ド０３０赤を使用して印刷された印刷物と
全く同じものが得られた。Next, the cleaning waste liquid 50 obtained in the recovery tank 1 for the first color was produced by using a desperer stirrer to prepare a correction ink 030 red F using 1/2 of the solvent component in the ink 030 red. 030 Red F was added to 50 to prepare a recycled ink 030 Red G. After washing the printing unit of the same printing machine, using regenerated ink 030 red G to print on the corrugated paper, the printed matter obtained was printed using the first standard ink, exceed 030 red. The exact same printed matter was obtained.
【００１６】又，エクシ−ド１７０紺藍のインキ溶媒成
分の１／２を使用した補正用インキ１７０紺藍Ｆをデス
パ−攪拌機によって製造し，２色目の回収槽４で得られ
た洗浄廃液５０に対して，１７０紺藍Ｆを５０加えて再
生インキ１７０紺藍Ｈを製造した。同印刷機の印刷ユニ
ットを洗浄した後，再生インキ１７０紺藍Ｈを使用し
て，段ボ−ルに印刷したところ，得られた印刷物は標準
インキであるエクシ−ド１７０紺藍を使用して印刷した
印刷物と全く同じものが得られた。各印刷物の性能比較
を表１に示した。Further, a cleaning waste liquid 50 obtained by producing a correction ink 170 azure blue F using 1/2 of the ink solvent component of the exceed 170 azure indigo by a desper-agitator and obtaining it in the second color recovery tank 4 On the other hand, 170 dark blue F was added to 50 to produce recycled ink 170 dark blue H. After cleaning the printing unit of the same printing machine, using regenerated ink 170 indigo blue H, printing on the corrugated ball, the obtained printed matter uses the standard ink, exceed 170 indigo indigo. Exactly the same printed matter was obtained. The performance comparison of each printed matter is shown in Table 1.
【００１７】 判定基準 ： ○＝良好， △＝やや不良， ×＝
不良 使用シ−ト： 十条Ｃ，２００ｇライナ−使用[0017] Criteria: ○ = good, △ = somewhat bad, × =
Defective use sheet: Jujo C, 200g liner use
【００１８】[0018]
【発明の効果】この発明は，印刷ユニットの洗浄廃液を
複数の廃液回収槽に分別回収して再利用する方法であ
り，この発明によって，洗浄廃液から発生する産業廃棄
物の消滅による公害防止と，処理コストの削減と廃液の
リサイクルによる省資源をはかることが出来るものであ
る。Industrial Applicability The present invention is a method for separating and recovering the cleaning waste liquid of the printing unit into a plurality of waste liquid recovery tanks and reusing it. The present invention prevents pollution caused by disappearance of industrial waste generated from the cleaning waste liquid. , It is possible to reduce processing cost and save resources by recycling waste liquid.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明に係るフレキソ印刷機の印刷ユニット及
び廃液回収槽の側面図。FIG. 1 is a side view of a printing unit and a waste liquid recovery tank of a flexographic printing machine according to the present invention.
【図２】同前面図。FIG. 2 is a front view of the same.
１ インキ容器（回収と兼用） ２ インキ洗浄剤容器 ３ インキ又は洗浄剤 ４ アニロックスロ−ル ５ ゴムロ−ル ６ 版胴 ７ 圧胴 ８ ゴム版 ９ 段ボ−ル紙 10 ドクタ−ブレ−ド 11 廃液受け皿 12 廃液回収槽〔〜〕 13 バルブ 14 遮蔽板 15 流入パイプ 1 Ink container (also used for collection) 2 Ink cleaning agent container 3 Ink or cleaning agent 4 Anilox roll 5 Rubber roll 6 Plate cylinder 7 Impression cylinder 8 Rubber plate 9 Tier ball paper 10 Doctor blade 11 Waste liquid Receiving tray 12 Waste liquid collection tank [-] 13 Valve 14 Shielding plate 15 Inflow pipe
Claims (3)
回収槽に分別回収して再利用する方法。1. A method of separately collecting and recycling a cleaning waste liquid of a printing unit into a plurality of hue-based recovery tanks.
ットに使用されているインキの溶媒と同じ組成の溶媒を
使用して洗浄廃液を再利用する方法。2. A method of reusing the cleaning waste liquid by using a solvent having the same composition as the solvent of the ink used in the printing unit as a cleaning agent for the printing unit.
と補正用インキを利用して再生インキを得る方法。3. A method for obtaining a recycled ink using waste liquid generated by cleaning a printing unit and a correction ink.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2887994A JPH07214042A (en) | 1994-01-31 | 1994-01-31 | Method for recycling waste washing liquid of printing unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2887994A JPH07214042A (en) | 1994-01-31 | 1994-01-31 | Method for recycling waste washing liquid of printing unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07214042A true JPH07214042A (en) | 1995-08-15 |
Family
ID=12260685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2887994A Pending JPH07214042A (en) | 1994-01-31 | 1994-01-31 | Method for recycling waste washing liquid of printing unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07214042A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2023000153A (en) * | 2021-06-17 | 2023-01-04 | 都インキ株式会社 | Method for producing black regenerated ink |
| JP2023001110A (en) * | 2021-06-17 | 2023-01-04 | 都インキ株式会社 | Black reproduction ink |
-
1994
- 1994-01-31 JP JP2887994A patent/JPH07214042A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2023000153A (en) * | 2021-06-17 | 2023-01-04 | 都インキ株式会社 | Method for producing black regenerated ink |
| JP2023001110A (en) * | 2021-06-17 | 2023-01-04 | 都インキ株式会社 | Black reproduction ink |
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