Qingdao Sigma Chemical Co., Ltd (International, US, EU, Canada and Australia domestic

Hate to keep asking so many questions. But when it specifies "Air venting" does that mwan it's made to where I will not have to use a vent needle.. ive never read thelar particular specification before....
I believe air venting just refers to one of the uses of a filter with ptfe membrane. They are sometimes used to pull moisture out of air as it passes through
 
@Dirthand

Ask whatever you want brother, that never bothers me.

Missed's answer is correct. PTFE is used to filter air vents on equipment requiring dry, sterile air.
You’re a good dude Ghoul. It’s nice you provide so much free information and harm reduction techniques. I appreciate the advice you’ve given me and my friends via PM and the time you’ve taken out of your day to help complete strangers. I misread you initially and I would like to publicly apologize for the mean and rude things I’ve said to and about you.
 
You’re a good dude Ghoul. It’s nice you provide so much free information and harm reduction techniques. I appreciate the advice you’ve given me and my friends via PM and the time you’ve taken out of your day to help complete strangers. I misread you initially and I would like to publicly apologize for the mean and rude things I’ve said to and about you.

No need to apologize brother. Somebody's gotta keep me humble lol
 
I have always done well with Millipore PVDF, works great with EO and Guaiacol (When I used a lot of TNE). You just have to adjust the temperature and psi.

Nylon sucks, worst of the 3, blows right up, clogs and gets slow. I have never tried PTFE.

Millipore got better years back when they started making them thicker, handles more heat and psi than it did years back. Years back they were much more available as well. They used to crack and leak.

Glass media bottle instead of that plastic junk and a brake bleeder pump, plastic pumps are garbage!
 
You’re a good dude Ghoul. It’s nice you provide so much free information and harm reduction techniques. I appreciate the advice you’ve given me and my friends via PM and the time you’ve taken out of your day to help complete strangers. I misread you initially and I would like to publicly apologize for the mean and rude things I’ve said to and about you.
Sir, what you just did... takes a big heart and a giant set of balls!
 
You’re a good dude Ghoul. It’s nice you provide so much free information and harm reduction techniques. I appreciate the advice you’ve given me and my friends via PM and the time you’ve taken out of your day to help complete strangers. I misread you initially and I would like to publicly apologize for the mean and rude things I’ve said to and about you.
More people should act like this, I do my best to no matter what.
 
I have always done well with Millipore PVDF, works great with EO and Guaiacol (When I used a lot of TNE). You just have to adjust the temperature and psi.

Nylon sucks, worst of the 3, blows right up, clogs and gets slow. I have never tried PTFE.

Millipore got better years back when they started making them thicker, handles more heat and psi than it did years back. Years back they were much more available as well. They used to crack and leak.

Glass media bottle instead of that plastic junk and a brake bleeder pump, plastic pumps are garbage!
If you will check out some compatibility charts PTFE is the beat rated membrane for all silvents and chemicals.. according to all the searching I have done.. I have experienced nylon being slow as well... and those fucking plastic media bottle that come with bottletop filters has cracked in me before as well.. the best place for them is definitely the trash!!!
Peace
 
If you will check out some compatibility charts PTFE is the beat rated membrane for all silvents and chemicals.. according to all the searching I have done.. I have experienced nylon being slow as well... and those fucking plastic media bottle that come with bottletop filters has cracked in me before as well.. the best place for them is definitely the trash!!!
Peace
I keep hearing about PTFE, it has been a thought but I'm so use to and adjusted to Millipore for about 15 years now.

The tops used to crack and leak, it's why I shy away from cheaper models, but Millipore a few years back started making the clear plastic much thicker than in the past. They just keep jacking up the price and for about 4 years now only 2 places in the US sell them.

Amazon had them a few years back but at some point they become less available unless from GPZ or Med Labs.

Nalgene is the only brand I tried nylon, maybe other brands have better.

I am curious to what new companies out there are comparable to Millipore.
 
If you will check out some compatibility charts PTFE is the beat rated membrane for all silvents and chemicals.. according to all the searching I have done.. I have experienced nylon being slow as well... and those fucking plastic media bottle that come with bottletop filters has cracked in me before as well.. the best place for them is definitely the trash!!!
Peace
I guess what I meant by compatible is durability.

Millipore is made pretty strong while the cheaper options seem fragile.
 
If you will check out some compatibility charts PTFE is the beat rated membrane for all silvents and chemicals.. according to all the searching I have done.. I have experienced nylon being slow as well... and those fucking plastic media bottle that come with bottletop filters has cracked in me before as well.. the best place for them is definitely the trash!!!
Peace
Nothing spoils your day more than filtering the last 100mls of a 500ml batch via a bottle top setup , and then you see bubbles rising to the surface from the bottom plastic collection bottle.
I switched to glass a while back due to the manufacturing quality inconsistencies with the Merck stericup bottle top systems.
 
I keep hearing about PTFE, it has been a thought but I'm so use to and adjusted to Millipore for about 15 years now.

The tops used to crack and leak, it's why I shy away from cheaper models, but Millipore a few years back started making the clear plastic much thicker than in the past. They just keep jacking up the price and for about 4 years now only 2 places in the US sell them.

Amazon had them a few years back but at some point they become less available unless from GPZ or Med Labs.

Nalgene is the only brand I tried nylon, maybe other brands have better.

I am curious to what new companies out there are comparable to Millipore.
I have a few of the millipore sterocups 1000ml packed up.. i used a couple of them when I first started and I think they were the reason some of my gear come out cloudy, but i can say for certain. ... I figure i may use them for things with lower bb % like Test E and EQ. It is hard to find PTFE sterile bottle top filters... KS-TEK said they would nake some but it would be a coupke of months out.. that was about 2 months ago i never checked back with them. I've just been usung syringe filters and vialing everything up as I make it. I was doing bottletop filter and syringe filter but after I did some sterility testing both ways I found it to be unnecessary...
 
I have a few of the millipore sterocups 1000ml packed up.. i used a couple of them when I first started and I think they were the reason some of my gear come out cloudy, but i can say for certain. ... I figure i may use them for things with lower bb % like Test E and EQ. It is hard to find PTFE sterile bottle top filters... KS-TEK said they would nake some but it would be a coupke of months out.. that was about 2 months ago i never checked back with them. I've just been usung syringe filters and vialing everything up as I make it. I was doing bottletop filter and syringe filter but after I did some sterility testing both ways I found it to be unnecessary...
I don't have a cloudy issue with Millipore, BB at 20% no issue.

I have used EO and guaiacol, no issue. You'll have to lower psi and heat needs to be on the lower end.

But it sounds like PTFE is better.
 
Gonna find out the cops have a sense of humor when they toss us all into Quentin State Correctional with the rest of the "customers" of this massive setup lol

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I use proton exclusively and I got zero probs.

Something tells me the people with probs are in an incoming list flagged Later - not urgent - annoying mfks

Rude. Let's all hope our beloved source doesn't filter emails right after taking payment.

Anyway, I tried it with multiple proton accounts. So if they did filter me, they filtered my ip address+protonmail account.

Except then I used non proton mail and it went through just fine. Also I tried multiple different vpn addressess, countries, etc. Nothing went through and to this day still doesn't. Curious. Maybe they want some people to have to use unencrypted emails because theyre really cops and all this is all just a big sting operation. :D
 
I assume only the stuff from the EU warehouse is shipped inside the EU. How is it with getting stuff from the international warehouse into EU?
 
I have a few of the millipore sterocups 1000ml packed up.. i used a couple of them when I first started and I think they were the reason some of my gear come out cloudy, but i can say for certain. ... I figure i may use them for things with lower bb % like Test E and EQ. It is hard to find PTFE sterile bottle top filters... KS-TEK said they would nake some but it would be a coupke of months out.. that was about 2 months ago i never checked back with them. I've just been usung syringe filters and vialing everything up as I make it. I was doing bottletop filter and syringe filter but after I did some sterility testing both ways I found it to be unnecessary...
Alibaba 24x 250ml ptfe bottle top filter 75$ or 24x 500ml 95$ :)
 
I regret having to publicly criticize QSC, but I'm starting to feel deceived by their actions.

I ordered during the Black Friday promotion and paid promptly. However, communication issues arose as Tracy (WhatsApp) and Tracy (email) appeared to be different people. I had originally ordered through Tracy (email) but requested bank details from Tracy (WhatsApp).

There was complete silence from November 30th to December 14th. Between December 16-18th, I was informed that tracking would be available soon. I thanked them and inquired about the tracking on December 25th. On December 26th, I received a message stating that QSC was having issues with their bank account and I should check if my money had been returned, which it hadn't.

For 32 days, I've essentially been strung along, only to find out that my eagerly anticipated order won't be shipped. I'm now told to expect a refund in 2-4 weeks.

This experience has been frustrating and disappointing, especially given QSC's reputation in the industry. The lack of clear communication, extended periods of silence, and the eventual cancellation of the order without proper explanation have left me feeling misled and undervalued as a customer. I expected better from a company of QSC's caliber and hope they will address these issues to prevent similar situations in the future.
Something similar has been done to me. From when I made the payment until they verified the payment, not that the money had not arrived in their possession, 9 days passed. With Yura in 2 days it was enough to verify the payment. Both cases were transfers and from the same bank account. and then it took 10 days to send the drugs, etc.
 
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