Next afternoon, Sai took us to another village, where La (16 years old) had just started her batch of noodles steaming. This is described in detail on the blog

http://www.foodfromnorthernlaos.com/2012/02/22/khao-soi-noodle-making/

I shall tomorrow put many more pictures of our visit to La on this site.

Sequence:
When the batter is evenly spread, she lifts of the lid on the steaming wok, removes the tray inside, and puts the new tray in its place. The tray that was inside gets placed on a stand to cool for a while.