| 摘要 |
<p>PURPOSE:To form a writing range (an area where a music program, etc., is written) without affixing a conventional paper label e.g. in a tape cassette. CONSTITUTION:By applying a printing using a writing ink in which a powder of a highly water-absorbent polymer is contained, a writing range 10 is formed. In the writing range 10, a water soluble ink does not float even when a water soluble pen is used for writing by the water absorption power of the power of the highly water-absorbent polymer, and the writing can be favorably done.</p> |
