| 摘要 |
922,506. Hectographic transfer paper. W. RITZERFELD, and G. RITZERFELD, March 2, 1961 [March 9, 1960 (2); April 5. 1960], No. 7655/61. Addition to 883,557. Class 96. [Also in Groups XVI and XX] A hectographic transfer sheet comprises a transferable layer containing a hectographic dye, wax, or fat, which may be covered by an additional layer comprising dextrine, gum arabic, gelatine, polyvinyl alcohol, alginate, starch, carboxymethylcellulose or methylcellulose. |
