Cotton twine or something similar to use as a base for wrapping
Cardboard bobbins or pieces of cardboard
Optional: Brass nuts and washers
How to Make a 2-Tone Necklace:
Step 1: Take each of your chosen embroidery thread colors and wrap them each around its own piece of cardboard. This makes them easier to manipulate and cuts down on tangling.
Step 2: Cut a long piece of cotton twine or rope, and tie the two colored threads to the rope leaving at least 3 inches of slack.
Step 3: Tape down the slack to a flat surface or safety pin it to something that will help keep it in place.
Step 4: Lay the color that isn’t being used (shown here in purple) in your left hand, along with the rope, and hold them taut.
Step 5: Take the active color (shown here in red) in your right hand, pass it over the rope, loop it under and back through the opening. Pull up and to the right to tighten.
Step 6: Repeat the knots until you are ready to switch colors.
Step 7: Switch colors by putting the inactive color (red) in your left hand and the new active color (purple) in your right. Repeat the steps. If you're a lefty, of course do the switch up and use opposite hands.
Step 8: Once you’re done knotting with the floss, if you'd like, you can add a few nuts and/or washers to the necklace. Undo the large starter knot and tie both open ends together, creating your very own friendship necklace! Trim any extra rope and tread. Done!