Durable, copper-coated tacks for classic canvas stretching!
For centuries, copper tacks were the only acceptable way to attach canvas onto wooden support frames. Copper tacks offer greater holding power on canvas edges, and are less prone to ripping canvas than common wire staples or upholstery tacks. The copper tack is still used when strength, durability and corrosion protection is a must. Some artists use copper-dipped #6 upholstery tacks on their canvases, believing that these are as safe and durable as artist's tacks. Due to the sharp, jagged linear tooth of the upholstery tack, the canvas is not merely pierced as a small round hole, but in a rough slit, creating possible tearing over time with canvas flex or if re-stretching is necessary.