Hello, Don. Thermoforming is to use a heat while form (bend or twist) the planks. Russians are happily use cloth or soldering iron to apply heat. It is two step process:
- wet\soak the planks in the water,
- while the planks are wet apply heat (iron) to form
- wet\soak the planks in the water,
- while the planks are wet apply heat (iron) to form