Some improvements in the preparation of hectographic papers (Machine-translation by Google Translate, not legally binding)

摘要

Improvements in the preparation of hectographic papers characterized by the discovery of the layer of hectographic ink deposited on a support paper with a wax film or mixture of waxes and fats that once coagulated protects the layer of hectographic ink and prevents humidity from affecting said hectographic ink. (Machine-translation by Google Translate, not legally binding)