1. The Fat Farmers Association cut a hole in the pine tree.

2. Wait for the white milky liquid to flow out of the pine tree. This is turpentine.

3. Put turpentine into the boiler for processing and refining.

4. The steam after distillation is gathered into turpentine.

5. The yellow liquid that finally flows out solidifies into rosin.

I wrote a detailed article about rosin production on Alibaba. There are pictures to explain step by step. If you want to know the detailed process, go to Heifei immediately.