The artist demonstrates how to maintain high-quality lines on rice paper using a Tjanting tool and India ink. Unlike Posca markers, which can appear fuzzy on rice paper, the metal tip of the Tjanting tool ensures consistent lines without fuzziness. This traditional tool from Indonesia is versatile and can be used with India ink on different paper types for various artistic purposes. Remember to clean the tool with water after use to prevent ink from drying and clogging the tip, and excess ink can be utilized for creating additional artworks, reducing waste.