DI Resin Layers

uninformed · Dec 1, 2020

I'm curious about what I can take away from the layers showing up in my DI resin, which is the standard mixed bed resin from BRS. In the picture below, the blue resin at the top is obviously still good, and the amber layer at the bottom is obviously spent. However, what about the white layer in the middle? Is that simply "being used but not spent" or is it indicative of the anion part of the mixed DI resin being consumed faster than the cation, and when the cation is consumed, it will turn amber?

Has anyone else seen this same behavior?

LiveWire · Dec 1, 2020

It looks to me like a negative space in between the resins from loose packing. Are you packing the canister really tight to the point that it is touch to get the bottom ring on because the resin is trying to come out from the pressure at the same time?

uninformed · Dec 1, 2020

LiveWire said:
It looks to me like a negative space in between the resins from loose packing. Are you packing the canister really tight to the point that it is touch to get the bottom ring on because the resin is trying to come out from the pressure at the same time?

Ha ha...no, it is definitely full of resin, direct from BRS. If you zoom in on the full-sized image, you can see how the layers meld into one another.

LiveWire · Dec 1, 2020

Haha I had to ask. I zoomed in but was not sure if it was a void as I have had a pocket in the past and it looked just like that expect smaller. If its packed well i would guess its just a dye issue. Im sure with making tons of dyed resin that some hiccups happen. Is this the only one that you have that has done this and if so do you have another on the shelf from the same order?

Uncle99 · Dec 1, 2020

Seems like normal BRS colour changing resin.
But I don’t follow the colour, I follow my tds meter.
Even after the dark colour is gone, I get 30-40g of 0-1 tds water and the stuff is expensive.

looks like 1/3 remaining, 1/3 getting exhausted, and 1/3 exhausted.