How peice of wood by sawing machine..........

This person is marking the line which he needs the edge of the piece of the wood. It done by hitting the thread tied both ends.The thread is soaked in a black die.which they normally prepared by local method ,Used penlite battery's black dust mixed with water.He marks the expected sizes from the middle of the timer before slide.Italian made chain saw used to slice wood.this wood can use to make furniture so on.....