JPH02227472A - Oil-base black ink - Google Patents
Oil-base black inkInfo
- Publication number
- JPH02227472A JPH02227472A JP1047939A JP4793989A JPH02227472A JP H02227472 A JPH02227472 A JP H02227472A JP 1047939 A JP1047939 A JP 1047939A JP 4793989 A JP4793989 A JP 4793989A JP H02227472 A JPH02227472 A JP H02227472A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- black ink
- nigrosine
- ink
- parts
- 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
- WBIQQQGBSDOWNP-UHFFFAOYSA-N 2-dodecylbenzenesulfonic acid Chemical compound CCCCCCCCCCCCC1=CC=CC=C1S(O)(=O)=O WBIQQQGBSDOWNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229940060296 dodecylbenzenesulfonic acid Drugs 0.000 claims abstract description 12
- 239000005011 phenolic resin Substances 0.000 claims abstract description 9
- 239000002904 solvent Substances 0.000 claims abstract description 9
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 5
- 230000001476 alcoholic effect Effects 0.000 claims abstract 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 abstract description 12
- 230000007797 corrosion Effects 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 7
- 229910052751 metal Inorganic materials 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 7
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 abstract description 3
- 230000009965 odorless effect Effects 0.000 abstract description 3
- 230000032683 aging Effects 0.000 abstract 1
- 239000000976 ink Substances 0.000 description 25
- 239000005456 alcohol based solvent Substances 0.000 description 4
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 3
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 3
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 3
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 3
- 239000005642 Oleic acid Substances 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000002845 discoloration Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 3
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000008096 xylene Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- -1 igo-butanol Chemical compound 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 235000015096 spirit Nutrition 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 1
- QCDWFXQBSFUVSP-UHFFFAOYSA-N 2-phenoxyethanol Chemical compound OCCOC1=CC=CC=C1 QCDWFXQBSFUVSP-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241001562081 Ikeda Species 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- WVDDGKGOMKODPV-ZQBYOMGUSA-N phenyl(114C)methanol Chemical compound O[14CH2]C1=CC=CC=C1 WVDDGKGOMKODPV-ZQBYOMGUSA-N 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、臭気がなく、経時安定性に優れ、金属腐食の
ない油性黒色インキに関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an oil-based black ink that is odorless, has excellent stability over time, and is free from metal corrosion.
（従来の技術とその課題）
従来油性黒色インキとしては、合金タイプの油性黒色染
料を用いたもの、或いは、ニグロシンを用いたものが知
られている。(Prior Art and its Problems) As conventional oil-based black inks, those using an alloy type oil-based black dye or those using nigrosine are known.
しかしながら、含金タイプの油性黒色染料を用いた油性
黒色インキは、定着性が十分なものではなかった。However, oil-based black ink using a metal-containing oil-based black dye did not have sufficient fixing properties.
また、ニグロシンを用いた油性黒色インキは溶解安定性
が低いため、可溶化剤としてオレイン酸等の脂肪酸、溶
剤としてキシレン、トルエン等の芳香族炭化水素等が用
いられていたものであるが、臭気等の問題があり、溶剤
としてアルコール系溶剤が用いられる様になった。In addition, oil-based black ink using nigrosine has low dissolution stability, so fatty acids such as oleic acid are used as a solubilizer, and aromatic hydrocarbons such as xylene and toluene are used as solvents, but they have an odor. Due to these problems, alcohol-based solvents have come to be used as solvents.
しかし、上記油性インキは、経時により染料が析出し、
カスレを生じ、筆記不能となる、又は、インキ収容管と
して、アルミニウム等の金属が用いられる際、管の腐食
により、インキの変色が生じる等といった点で問題のあ
るものである。However, with the above oil-based ink, the dye precipitates over time,
Problems arise in that ink stains may occur, making it impossible to write, or, when a metal such as aluminum is used as an ink storage tube, the ink may change color due to corrosion of the tube.
（課題を解決するための手段）
本発明者等は、上記問題点に鑑み、鋭意研究の結果、遂
に本発明を完成したものであり、即ち、その要旨を、ニ
グロシンとアルコール系溶剤とドデシルベンゼンスルホ
ン酸とフェノール樹脂とを少なくとも含有する油性黒色
インキとするものである。(Means for Solving the Problems) In view of the above problems, the present inventors have finally completed the present invention as a result of intensive research. The present invention is an oil-based black ink containing at least sulfonic acid and a phenolic resin.
以下１本発明を詳述する。The present invention will be explained in detail below.
ニグロシンは着色剤として使用するものであリ、具体的
には、ニグロシンベースＥＸ（オリエント■ｍ＞ 、オ
イルブラックＳ、オイルブラックＦＳスペシャル（中央
合成化学■製）、ニグロシンベースＬＫ （ＢＡＳＦ社
ｍ＞ 、ニグロシン（池田化学工業■ＩＩ） 、オイル
スピリッツブラックＡＢ、オイルスピリッツブラックＳ
Ｂ（オリエント化学工業■ｍ＞ 、ニグロシンベースＮ
、ニグロシンベースＮＢ、・（ＮＡＣ社製）、ニグロシ
ンベースＧＢ （ＦＢｙ社１Ｋ）等が挙げられ、これら
の一種もしくは二種以上混合して用いるものであり、そ
の添加量は、インキ全量に対し、３〜２０重量％が好ま
しい。Nigrosine is used as a coloring agent, and specifically, Nigrosine Base EX (Orient), Oil Black S, Oil Black FS Special (manufactured by Chuo Gosei Kagaku), Nigrosine Base LK (BASF), etc. , Nigrosine (Ikeda Chemical II), Oil Spirits Black AB, Oil Spirits Black S
B (Orient Chemical Industry m>, Nigrosine Base N
, Nigrosine Base NB (manufactured by NAC), Nigrosine Base GB (FBy 1K), etc., and these are used singly or in combination of two or more, and the amount added is based on the total amount of ink. 3 to 20% by weight is preferred.
アルコール系溶剤は溶剤として使用するものであり、具
体的には、メタノール、エタノール、ｎ−プロパツール
、１ｓｏ−プロパツール、ｎ−ブタノール、ｉｇｏ−ブ
タノール、メチルセロソルブ、エチルセロソルブ、ベン
ジルアルコール、フェニルセロソルブ等の一種もしくは
二種以上混合して用いるものであり、その添加量はイン
キ全量に対し、４０〜９０重量％が好ましい。Alcohol solvents are used as solvents, and specifically include methanol, ethanol, n-propatool, 1so-propatool, n-butanol, igo-butanol, methyl cellosolve, ethyl cellosolve, benzyl alcohol, and phenyl cellosolve. They are used either singly or in combination of two or more, and the amount added is preferably 40 to 90% by weight based on the total amount of the ink.
ドデシルベンゼンスルホン酸は、可溶化剤として使用す
るものであり、その添加量はインキ全量に対し、０．５
〜１０重量％が好ましい。Dodecylbenzenesulfonic acid is used as a solubilizer, and the amount added is 0.5 to the total amount of ink.
~10% by weight is preferred.
フェノール樹脂は定着性向上剤として使用するものであ
り、具体的には、タマノール１００Ｓ、タマノール５１
０（荒用化学工業＠製）等が挙げられ、これらは一種も
しくは二種以上混合して用いるものであり、その添加量
は、インキ全量に対して、５〜３０重量％が好ましい。Phenol resin is used as a fixing property improver, and specifically, Tamanol 100S, Tamanol 51
0 (manufactured by Arayo Kagaku Kogyo@), etc., and these are used singly or in combination of two or more, and the amount added is preferably 5 to 30% by weight based on the total amount of the ink.
尚、上記各成分以外に必要に応じ、防錆剤、各種活性剤
等の種々の添加剤を適宜選択して使用可能である。In addition to the above-mentioned components, various additives such as rust preventive agents and various activators may be appropriately selected and used as required.
（作用）
本発明の油性黒色インキが何故臭気、毒性がなく、経時
安定性に優れ、金属管に対して腐食が生じないかについ
ては定かではないが以下のように推察される。(Function) It is not clear why the oil-based black ink of the present invention has no odor or toxicity, has excellent stability over time, and does not cause corrosion to metal pipes, but it is speculated as follows.
溶剤として、アルコール系溶剤を用いることにより、臭
気、毒性がなく、ニグロシンは、ドデシルベンゼンスル
ホン酸に対して、優れた溶解性を示し、更に、アルコー
ル系溶剤との相溶性に優れていることにより、ニグロシ
ンが安定に溶解されるものと思われる。By using an alcohol-based solvent as a solvent, there is no odor or toxicity, and nigrosine exhibits excellent solubility in dodecylbenzenesulfonic acid, and also has excellent compatibility with alcohol-based solvents. It is believed that nigrosine is stably dissolved.
更に、ドデシルベンゼンスルホン酸は、金属に対して、
腐食の悪影響を及ぼさない。Furthermore, dodecylbenzenesulfonic acid has the following effects on metals:
No negative effects of corrosion.
（実施例） 以下実施例により、更に詳細に説明する。(Example) The present invention will be explained in more detail with reference to Examples below.
実施例、比較例中単に「部」とあるのは「重量部」を示
す。In Examples and Comparative Examples, "parts" simply indicate "parts by weight."
失ｉ涯よ
ニグロシンベースＥＸにグロシン、オリエント化学工１
１１）１０００部
メチルソルブ ７５．０部ドデシルベ
ンゼンスルホン酸 ５．０部タマノール１００８（
フェノール樹脂、荒用化学工業−＄１） １０
．０部上記各成分を市販の撹拌機で４時間撹拌すること
により、油性黒色インキを得た。I'm lost, Nigrosine Base EX, Grosine, Orient Kagaku Kogyo 1
11) 1000 parts Methylsolve 75.0 parts Dodecylbenzenesulfonic acid 5.0 parts Tamanol 1008 (
Phenol resin, Arayo Kagaku Kogyo - $1) 10
．． 0 parts An oil-based black ink was obtained by stirring the above components for 4 hours using a commercially available stirrer.
ル豊舛上
実施例よりニグロシンベースＥＸを除き、その量だけバ
リーファーストブラック３３０８ （油溶性染料、オリ
エント化学工業ｍｍ＞を加えた以外は実施例１と同様に
して油性黒色インキを得た。An oil-based black ink was obtained in the same manner as in Example 1, except that Nigrosine Base EX was removed from the above Example, and Barry Fast Black 3308 (oil-soluble dye, Orient Kagaku Kogyo mm) was added in the same amount.
、ｕｕ！Ｌ８−
オイルブラ ッ りＦＳスペシャルにニグロシン、中央
台Ｉａ化ｔ１ｍ）１５．０部
メチルセルソルブ ５０．０部メタノール
２０．０部ドデシルベンゼンスルホン
酸 １０．０部タマノール５１ｏ（フェノール樹脂、
荒用化学工業＠製） ５．０部上記各成分を実
施例１と同様にして油性黒色インキを得た。,uu! L8-Oil Black FS Special with Nigrosine, Chuodai Ia t1m) 15.0 parts Methyl Cellsolve 50.0 parts Methanol
20.0 parts Dodecylbenzenesulfonic acid 10.0 parts Tamanol 51o (phenol resin, manufactured by Arayo Kagaku Kogyo@) 5.0 parts An oil-based black ink was obtained using the above components in the same manner as in Example 1.
迄狡涯１
実施例２のメタノールを除きその量だけキシレンを加え
た以外は実施例２と同様にして油性黒色インキを得た。Until then 1 An oil-based black ink was obtained in the same manner as in Example 2, except that methanol in Example 2 was removed and xylene was added in the same amount.
失１何１
オイルブラ ツク Ｓにニグロシン、中央合成化学ＩＩ
Ｉ）８．０部
メチルセロソルブ ４３．０部ｎ−プロパ
ツール ２７．０部ドデシルベンゼンスルホ
ン酸 １２．０部タマノール１００８（フェノール樹
脂。Missing 1 and 1 Oil Bra Tsuk S and Nigrosine, Central Synthetic Chemistry II
I) 8.0 parts Methyl cellosolve 43.0 parts n-propatol 27.0 parts Dodecylbenzenesulfonic acid 12.0 parts Tamanol 1008 (phenolic resin).
荒用化学工業ｎ製） １０．０部上記各成分を
実施例１と同様にして油性黒色インキを得た。(manufactured by Arayo Kagaku Kogyo n) 10.0 parts An oil-based black ink was obtained using the above components in the same manner as in Example 1.
炭較何１
実施例３のｎ−プロパツールを除き、その量だけキシレ
ンを加え、ドデシルベンゼンスルホン酸を除き、その量
だけオレイン酸を加えた以外は実施例３と同様にして油
性黒色インキを得た。Carbon Comparison 1 An oil-based black ink was prepared in the same manner as in Example 3 except that n-propertool in Example 3 was removed and xylene was added in the same amount, and dodecylbenzenesulfonic acid was removed and oleic acid was added in the same amount. Obtained.
失ｍ
ニグロシンベースＥＸ（＝グロシン、オリエント化学Ｉ
Ｉ）４．０部
ｎ−プロパツール ７０．０部ドデシルベン
ゼンスルホン酸 ６．０部タマノール５１０（フェ
ノール樹脂、
荒用化学工業■製） ２０．０部上記各成分を
実施例１と同様にして油性黒色インキを得た。Loss m Nigrosine Base EX (=Grosine, Orient Chemical I
I) 4.0 parts n-propatool 70.0 parts Dodecylbenzenesulfonic acid 6.0 parts Tamanol 510 (phenol resin, manufactured by Arayo Kagaku Kogyo ■) 20.0 parts Each of the above components was added in the same manner as in Example 1. An oil-based black ink was obtained.
星敗莢土
実施例４のドデシルベンゼンスルホン酸を除き、その量
だけオレイン酸を加えた以外は実施例４と同様にして油
性黒色インキを得た。An oil-based black ink was obtained in the same manner as in Example 4, except that the dodecylbenzenesulfonic acid in Example 4 was removed and oleic acid was added in the same amount.
キを得た。I got the key.
（効 果）
実施例１〜４、比較例１〜４により得られらた油性黒色
インキを市販のべんでるベン（ぺんてるｉＩＩ製）に充
填し、臭気試験、定着性試験。(Effects) The oil-based black inks obtained in Examples 1 to 4 and Comparative Examples 1 to 4 were filled into a commercially available Bentel Ben (manufactured by Pentel III), and odor tests and fixability tests were carried out.
表１
＊１臭気試験・・・・・・製品のキャップを外してペン
先部の臭いを嗅いで臭いの大少を判断する。Table 1 *1 Odor test: Remove the cap of the product and smell the pen tip to judge the degree of odor.
＊２２部安定性・・・・・・５０℃恒温室に製品を１ケ
月経時後、ＪＡＳ Ｐ３２０１筆記用紙Ａに手書きで
螺旋筆記。*22 Part Stability: After placing the product in a constant temperature room at 50°C for one month, write spirally by hand on JAS P3201 writing paper A.
０・・・・・・カスレなし Ｘ・・・・・・カスレ＊３
定着性試験・・・・・・ポリプロピレン製フィルムに手
書きで螺ＡＩ筆記し、５分後、ＪＩＳ Ｐ３２０１筆
記用紙Ａを重ね、５００ｇの荷重を加えて、筆跡上を１
０往復させた後、筆跡の剥離を目視判定。0: No stains X: Scraps*3
Fixation test: Screw AI was written by hand on a polypropylene film, and after 5 minutes, a layer of JIS P3201 writing paper A was placed over the handwriting, and a load of 500 g was applied to the handwriting.
After 0 reciprocations, the peeling of the handwriting was visually determined.
０・・・・・・剥離なし Ｘ・・・・・・剥離あり宰
４腐食試験・・・・・・ ５０℃恒温室に製品を１ケ月
経時後、ＪＩＳ Ｐ３２０１筆記用紙Ａに手書きで螺
旋筆記し、筆跡の腐食を目視判定。0...No peeling Visually assess corrosion of handwriting.
０・・・・・・変色なし ×・・・・・・変色Δ・・
・・・・やや変色あり
以上の様に本発明により、臭気がなく、経時安定性に優
れ、金属腐食のない、油性黒色インキが得られるもので
ある。0...No discoloration ×...Discoloration Δ...
...Slight discoloration As described above, the present invention provides an oil-based black ink that is odorless, has excellent stability over time, and is free from metal corrosion.
又１本発明の油性黒色インキは筆記具用のみならず、記
録計用ジェットプリンター用としても十分使用可能であ
る。Furthermore, the oil-based black ink of the present invention can be used not only for writing instruments but also for recorders and jet printers.
Claims (1)
ホン酸とフェーノール樹脂とを少なくとも含有する油性
黒色インキ。An oil-based black ink containing at least nigrosine, an alcoholic solvent, dodecylbenzenesulfonic acid, and a phenolic resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1047939A JPH02227472A (en) | 1989-02-28 | 1989-02-28 | Oil-base black ink |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1047939A JPH02227472A (en) | 1989-02-28 | 1989-02-28 | Oil-base black ink |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02227472A true JPH02227472A (en) | 1990-09-10 |
Family
ID=12789341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1047939A Pending JPH02227472A (en) | 1989-02-28 | 1989-02-28 | Oil-base black ink |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02227472A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007290298A (en) * | 2006-04-27 | 2007-11-08 | Pilot Ink Co Ltd | Oily writing utensil |
| JP2008093873A (en) * | 2006-10-09 | 2008-04-24 | Pilot Ink Co Ltd | Oil-based writing implement |
| WO2021029097A1 (en) * | 2019-08-09 | 2021-02-18 | 三菱鉛筆株式会社 | Oil-based ink composition for writing implements |
-
1989
- 1989-02-28 JP JP1047939A patent/JPH02227472A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007290298A (en) * | 2006-04-27 | 2007-11-08 | Pilot Ink Co Ltd | Oily writing utensil |
| JP2008093873A (en) * | 2006-10-09 | 2008-04-24 | Pilot Ink Co Ltd | Oil-based writing implement |
| WO2021029097A1 (en) * | 2019-08-09 | 2021-02-18 | 三菱鉛筆株式会社 | Oil-based ink composition for writing implements |
| JP2021028362A (en) * | 2019-08-09 | 2021-02-25 | 三菱鉛筆株式会社 | Oil-based ink composition for writing implements |
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