Brown gum paper tape is still preferred by many framers for sealing the backs of pictures.
Be sure to wet it thoroughly with a sponge or through a dispenser, otherwise it will tend to bubble away from the frame.
Often more durable in warm conditions. 70gm², to work in most wetters.
Box quantities may vary.
66m rolls are on 3" / 75mm cores.
200m rolls are on 36mm cores.