Image maked by me with CBM draws and logo
I had already noticed the increase in the price of the 2 row barely malt neutral. 
It is only below 70% structural integrity that the probability of getting neutral elements starts to increase. But in structures like the water tower, reaching a level below 70% is simply prohibitive to the natural economy. Looking for gray elements is a costly process in energy and CBM because building repair is cumulative.
Grain Field in 66%
But, what i need to get 66%?
7 rolls without repair to get a decent ratio with neutral water
At 66,6% with regular water you still have more chance of getting green materials, even using gray water
62% still isn´t good
Finally at 54% i can do some decent shots
In order to sell the malt, I had to migrate the production matrix so I acquired 25+ neutrals of each hops to rotate with the 2 Row Barley Malt. The blittering and aroma Hops were much cheaper. We can deduce that the overall production is centered on the colored hops and barley neutrals.
The increase in this material is perhaps due to the difficulty of acquiring neutral materials. After a few runs, I was able to draw several conclusions. Even if you don't repair the production buildings the percentage of neutral elements is still extremely low.
Intentionally getting neutral water is basically impossible. After 10 attempts without repairing the building. The tower decays more slowly and I'm still at 75% structural integrity,
After 12 attempts without repair i still having one BLUE! LOL
After many attempts and misfortunes I managed to create some 2 Row Barley Malt neutrals and put them on the market where I sold them not instantly but a few hours later. I currently have two waiting to be purchased at the market.
But im still working on since the event ends in two weeks as i read now