Yep, tanks do that. More VG and sweeter juices do it worst but, all of them will darken slightly. Does it in even a CE4 but those are smaller, so you don't notice it nearly as much as in something like a Davide or Protank.
Protank Darkening E Juice
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If the liquid is kept below a certain temperature, it does not darken. I have found that the heat radiating from the center column extending up through the liquid reservoir raises the temperature of the liquid significantly. Cooling the liquid immediately after repeated draws dramatically reduces the problem. I discovered this by accident while driving. If, after repeated draws, I held the vaporizer out the window and allowed the passing air to cool it down, no change in color occurred. Repeat attempts produced the same results.
Not surprisingly, superfluous heat can affect both flavor and vapor output. The degree of darkening appears to depend in part upon the liquid "recipe" and the voltage used to heat the atomizer.
Note that this problem can be mitigated by replenishing the reservoir when it drops below 65% full. A smaller volume of liquid absorbs more heat from the vertical column more rapidly and will darken faster than a full chamber. Keeping the reservoir full is a nuisance to be sure, but it does reduce the problem.
Some liquids appear to be highly sensitive to temperature. I hope to do some experiments to see which recipes are most susceptible to temperature-induced color variations.
Not surprisingly, superfluous heat can affect both flavor and vapor output. The degree of darkening appears to depend in part upon the liquid "recipe" and the voltage used to heat the atomizer.
Note that this problem can be mitigated by replenishing the reservoir when it drops below 65% full. A smaller volume of liquid absorbs more heat from the vertical column more rapidly and will darken faster than a full chamber. Keeping the reservoir full is a nuisance to be sure, but it does reduce the problem.
Some liquids appear to be highly sensitive to temperature. I hope to do some experiments to see which recipes are most susceptible to temperature-induced color variations.
This happened a lot when I first started using SS wicks in my genesis tanks. Ended up being from the wick making contact with the bottom of the metal tank. Backed the wick out slightly so it was no longer touching the bottom, and no more burnt juice.
The same thing can happen with a Protank head if there's a short somewhere.
The same thing can happen with a Protank head if there's a short somewhere.
+1. Whenever I get that harsh TH and flavor, I change or clean the head in my ProTank, or add more juice, depending on which action is appropriate.
The darker my juices get the better they seem to taste, especially the sweeter juices.
I liken it to a good wine maturing over time, even though it is down to heat and leaching that everyone else mentions
I liken it to a good wine maturing over time, even though it is down to heat and leaching that everyone else mentions
I notice this in the Protank and attribute it to the bottom coil design keeping the heat in the juice reservoir. It's not so much an issue with a top coil tank like the Vivi Nova. OTOH, I sense a more mellow flavor from the bottom coil than I do from a top coil. Vaping the juice right off the coil is harsher to me than vaping it through a short tube that leads to the juice.
Like most, I vape down to the bottom of the glass and dump and wash the tank after I remove the coil assembly during filling.
Anyone ever cut open a carto and look inside? The gunk washes right out in the sink and leaves the filler bright white and shiny, so it's not the filler that is scorching but the juice around the coil.
Like most, I vape down to the bottom of the glass and dump and wash the tank after I remove the coil assembly during filling.
Anyone ever cut open a carto and look inside? The gunk washes right out in the sink and leaves the filler bright white and shiny, so it's not the filler that is scorching but the juice around the coil.
Some juice darkens more than others. My juice used to darken (burn) like crazy. Was vaping around 8.5 Watts. Now I vape around 7.0 Watts, no darkening. Same tanks, same juice. As has been mentioned over and over, it's the heat, the leach back, and the type of juice. If you like it great. If you don't, reduce the heat. I found that the darker juice is harder on my wicks, and more heat with my sweet juices both caramelizes and carbonizes my wicks. Both lead to flooding and leaking eventually, more frequent cleanings, and to earlier coil death. Just my experience. Eventually, I found that the lower heat actually allowed me to experience the flavor a bit better. Of course, my taste buds have changed over six months, and I don't need as much heat, as much flavor, or as much nic. Different for everyone. My two cents.
I vape in the 6 watt range. My coils are 2.8 ohms and I vape at 3.7 - 4 volts. Some juices seems to need a little more and others need less to atomize. I find that really heavy vapor gives me a lung hit similar to smoking. What I want is light hit and clear lungs with no irritation.
I just noticed my juices doing this yesterday in my T2's and other clearos. I haven't noticed a taste difference.....not yet anyway.
A couple of posts mentioned getting a burned taste to their juice before they vaped the full tank, and really, this should not be happening. If you are starting with a clean tank and a clean coil/wick, and you are getting a burned taste before you have emptied the tank through normal vaping, it is quite likely that you need to lower the voltage/wattage setting of your PV.
Tennessee Cured is widely considered to be one of the worst juices to use as regards the gunk build up on coils and wick and I get at least a couple of refills out of my Pro Tank with TC in it with no problems. Add to this, that since TC is so hard on coils, I only use it on coils that I have already cleaned and re-wicked at least once. There really is no reason for any juice to be tasting burned within one filling of the tank other than having the power set too high on the PV.
And yes, the juice in your Pro Tank will get darker due to sunlight, heat from the coil and so on, but over cooking the juice is only going to serve to significantly hasten this process.
Tennessee Cured is widely considered to be one of the worst juices to use as regards the gunk build up on coils and wick and I get at least a couple of refills out of my Pro Tank with TC in it with no problems. Add to this, that since TC is so hard on coils, I only use it on coils that I have already cleaned and re-wicked at least once. There really is no reason for any juice to be tasting burned within one filling of the tank other than having the power set too high on the PV.
And yes, the juice in your Pro Tank will get darker due to sunlight, heat from the coil and so on, but over cooking the juice is only going to serve to significantly hasten this process.
Certain juices probably contribute to more caramelization of the sugars in the juice. I've been vaping a couple of juices pretty regularly lately and one starts out pale amber and gets dark while the other starts out almost colorless and develops a pale yellowish tint by the end of the day. Both are Hangsen, but Dekang does it, too. I doubt there are many juices of any brand that don't tint with heat and time.
Tanks reveal color change, but you can see it slightly in filler material when topping off a carto.
Tanks reveal color change, but you can see it slightly in filler material when topping off a carto.
I have the same problem. So after awhile I just got this habit of tilting it upwards and vape when it is 3/4 full. Keep the juice from turning darker (it still turn dark but it doesn't look as ugly).
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