From Scott Kelby, The Digital Photography Book Vol3 (Scott Kelby) pg42.
"If you don't have a roll of gaffer's tape in your studio, put down this book, go online and order a few rolls right now. Not duct tape. Not electrical tape. Graffer's tape! It's one of those things that once you have it, you'll wonder how you got through a shoot without it (ask any studio photographyer). You'll use it for everything from holding grid spots in place, to fixing a gap in softbox, to keeping things together when doing product shots, to... I could go on and on."
12 mil Industrial grade vinyl-coated cloth tape, available in a wide variety of colors, used for color coding seaming, bundling, and protection. Also used as a gaffer's tape in the Arts & Entertainment industry to hold wiring, lighting, and props.
Standard Metric ASTM Test Method Tensile Strength 46 lbs/in width 80.6 N/10 mm D 3759
Adhesion to Stainless Steel 50 oz/in width 5.47 N/10 mm D 3330
Thickness 12 mils 0.3 mm D 3652
Elongation 5 % 5 % D 3759
Service Temperature Min 50 °F 10 °C N/A Service Temperature Max 200 °F 93 °C N/A