other techniques
interlock 
Section where the colors change; two weft threads of a different color interlock and then return to their respective zones.
slit 
The space where the thread colors change; weft threads and warp threads interlock and then return to their respective zones.
hatching 
Technique used to mix colors: a weft thread enters a different color zone, interlocks with a warp thread and comes back to the original color zone.
knot 
Woolen yarn wound around two warp threads; its ends form the piles on a carpet.