| 摘要 |
PROBLEM TO BE SOLVED: To contribute to the reduction of a disposal amount of synthetic resin by using a biodegradable resin for an ink storage cylinder as a refill for an aqueous ink. SOLUTION: An ink storage cylinder of a refill for an aqueous ink has a base body molded of a biodegradable resin. Inside the base body, a resin layer is formed which is highly resistant to water and a solvent and is not dimensionally changed due to swelling to the aqueous ink to be stored. |
