Consideration about the Durability of the Supporting Body and Base Coat of a Painting

Abstract

In the humid area like the Hokuriku region, the canvas, which is made of cloth, expands and shrinks excessively due to the absorption and release of humidity, causing a crack which leads to peeling on the surface of the work from a fragile part of the layer structure, and the collapse of the work begins. In order to prevent the collapse of the work, it is necessary to create a work while considering the storage environment as well as the artist. A painting is a multilayered structure which starts with a supporting body, followed by→glue coating→prime coating→under drawing (lower sketching)→under painting (drawing in lower layer)→over painting (drawing in upper layer)→glaze→and finished with varnish. In this paper, the phenomenon which causes such collapse was examined as a problem of the supporting body and prime coating, and a panel that combines honeycomb cardboard with lightweight and durable SHINABENIA (plywood) was devised as a solution to the problem. In addition, even in a canvas where weakness was revealed, it became clear that it could be improved by inserting honeycomb cardboard in the back space of the wooden frame of the canvas.