Confluencias y divergencias de los materiales de forración entre Portugal y España

For many centuries, painting materials were common in Portugal and Spain, as in the rest of Europe. Through them we can deduce that the origin of gacha as lining adhesive comes from its use in canvases’ preparation. Likewise, in the Peninsula, techniques and materials in conservation were parallel, as the use of adhesives and starch past for lining. In Portugal, until about mid-twentieth century, wax-resin’s use is introduced and diffused, although it lasted relatively short time. In Spain, however, gacha was still in use.