開封10年の万年筆インクは問題なく使えるのか？ pelikan 4001 blue blackをPILOT kakunoで新しいインクと比べてみた。
I used fountain pen ink for 10 years after opening it until recently. My textbook (hobby text) says that the ink is used up in 2-3 years, but I used it without worrying about it, but what is the difference from the new ink? pelikan 4001 Blue Black PILOT kakuno middle character
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【万年筆インク】各社ブルーブラックインク色味比較24+1【ずんだもん】【四国めたん】【VOICEVOX】
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【万年筆】一番好きなブルーブラックを決めよう✨アンケートの1位は👑12種類を実際に比較🎨古典インク・顔料インクの特徴は？【インク沼】The Best of Blue Black INK !!
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