Niyapothu Weda fingernail-drawn lacquer filigree: resin softening and shellac line adhesion?

Niyapothu Weda (fingernail-drawn lacquer work) is a specialized freehand ornamentation technique practiced in Pallehapuvida near Matale. The artisan holds a stick of refined insect shellac (prepared from Kerria lacca resin and mineral pigments) over a clay bowl of live coconut-shell charcoal embers. Once the lacquer turns tacky and elastic at roughly 65°C, the craftsman draws a fine molten filament with the fingers and presses it onto the turned wood piece. Using the sharpened thumbnail, the artisan snips, loops, and presses the thread to form intricate traditional motifs—such as Liyawel (scrolling vines) and Bo-paturu (sacred fig leaf patterns). The warmth of the thumbnail fuses the thread onto the base coat without fracturing.