Three pieces of Hardi-plank siding.
Top piece is factory primed with no testing done.
Middle piece is factory primed soaked in water for 24 hrs and then put through 3 four hour freeze cycles and back in the water bath in between. The next freeze was 7 hours followed by two days of water bath ended with 4 hours of freeze. (total time 123 hrs)
The bottom piece is a “cut” end that was soaked in water for 2-1/2+ days followed by 4 hour freeze. (total time 72 hrs)