Actually you are pretty close to correct.
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...they put dirty plastic in and what they get out seems to vary according to who they want to sell it to.
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JBI has further developed the processor and learned how to adjust the operating conditions to produce whichever product the customer wants.
So, if the customer wants #2 fuel oil, the processors can be operated so that is the primary product produced.
If the customer wants naphtha, the processors can be operated do that is the primary product produced.
The same is true for #6 ultra low sulfur fuel oil.
Developing that level of flexibility in the P2O processor gives JBI quite an advantage in the marketplace.
That flexibility increases the pool of potential customers dramatically. It also allows JBI to adapt to shifting market demands with little difficulty.