| 摘要 |
<p>PURPOSE:To obtain the title ink which is excellent in fixability of a writing and causes neither clogging at a penpoint and a delivery port nor a thin spot in a writing even after long-term storage. CONSTITUTION:The ink contains at least nigrosine preferably in an amount of 5-15wt.% a 4C or lower aliphatic alcohol, such as methyl or ethyl alcohol, preferably in an amount of 40-90wt.%, a resin soluble in a 4C or lower aliphatic alcohol, such as a ketone resin or a phenol resin, preferably in an amount of 1-20wt.% and 1-20wt.% phthalic ester, such as monomethyl or monoethyl phthalate.</p> |
