The weft threads, which will be seen, are usually wool or cotton.
The most common bead weaving technique requires two passes of the weft thread.
First, an entire row of beads is strung on the weft thread.
Each weft thread crosses the warp threads by going over one, then under the next, and so on.
The next weft thread goes under the warp threads that its neighbor went over, and vice versa.
In other types of cutwork, both warp and weft threads may be drawn.
On some fabrics it may be possible to pull a weft thread from the fabric leaving a guideline along which to cut.
After each weft thread is woven the warp threads had to be picked out and lifted again, which made the process slow.
A pick is a single weft thread, hence the term.
The bobbins are held in a shuttle, which carries the weft thread through the shed.