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Black ink dot on Gentle Typhoon fans?

post #1 of 9
Thread Starter 
This isn't a 'problem' or 'issue' really. More of a curiosity for me than anything else. Seeing as how these Gentle Typhoons are the 'crème de la crème' of watercooling fans I figured this was the best forum to bring it up and ask about it since this is likely where the most people here on OCN will be that are familiar with them.

I just received a trio of 2150rpm Gentle Typhoon AP-00 (aka AP-45) fans to add to my collection which already included thirty-two AP-15s and three AP-14s, and upon opening the package I noticed right away that two of the three fans had rather large black dots on them that appeared to have been made by someone with a Sharpie-type permanent ink marker.

Black ink dot on Gentle Typhoon 2150rpm AP-00 AP-45 fan

Upon closer inspection the third AP-00 also had a black dot, just a lot smaller & less noticeable than the other two. That got me to looking harder at the other Gentle Typhoon fans I already had, and I really am surprised I hadn't noticed it before, but every single one of them has a similar black dot somewhere on the hub-part of the fan blades. Some are tiny and some are large. Some are right on the face of the fan, and others more off to the side.

Here's all of the Gentle Typhoons I have that are not already in use (I currently have fourteen AP-15s in push-pull on a 480 and a 360 rad). I've added arrows pointing to the black dot on each and every one of them:

Black ink dots on Gentle Typhoon AP-00, AP-14, and AP-15 fans

I have ordered all of these fans from more than 6 different retailers altogether, so it must be something done by the manufacturer.

- Have you a similar ink dot on any/all of your Gentle Typhoons?

- Any ideas as to what the dot is there for?

- Any ideas as to what the best way to try to remove it might be?

I was getting ready to just grab a q-tip and some isopropyl alcohol to see if it will just wipe off, but figured I might wait until after I asked here about it to see what everyone else says. I was a little leery since I know that alcohol can do damage to acrylics and some plastics. Maybe something else would be better to try, like maybe some 'goof-off' or similar?
post #2 of 9
Just a thought to throw out, could they be a balancing device. I know they are small and very well might just be different quality marks from different lines but who knows.
post #3 of 9
Thread Starter 
Quote:
Originally Posted by ssgtnubb View Post

Just a thought to throw out, could they be a balancing device. I know they are small and very well might just be different quality marks from different lines but who knows.

I'm not sure what the marks are for, but they appear to be just a mark with a permanent marker. I don't know how that could be a 'balancing device', but wouldn't be outside of the realm of possibility I suppose.

Here's a couple more up close shots:

Black ink dots on Gentle Typhoon fans

Black ink dots on Gentle Typhoon fans

^ You can see on the last one there when they marked the hub they managed to get a little dot of ink on the fan blade also.

Just looks to me like someone's job is to randomly dot every one of them with a Sharpie for some reason.

Seems pretty strange to me they'd be doing something like that right on the front of the fan. I tried to google it to see if this is something anyone else has noticed before, but didn't find anything. There's a dot on every one of my Gentle Typhoons which I've bought over a spread of 6 or more months now from Sidewinder, Jab-Tech, aaaWave, FrozenCPU, and a couple off of eBay, so I can't imagine I'm the only one with GT fans with these dots on them.
Edited by Unicr0nhunter - 4/23/14 at 4:44am
post #4 of 9
More than likely a inspection mark from quality control.
post #5 of 9
Looking at it more it has to be a QA check on the line, probably to make sure the fan is attached and all blades are accounted for.
post #6 of 9
Thread Starter 
Well, if no one says any different then I guess you're probably right. Sucks they would mark the front of the fan like that. Now I just got to figure the best way to clean it off of there, if possible to do without damaging the fan.
post #7 of 9
Quote:
Originally Posted by Unicr0nhunter View Post

Well, if no one says any different then I guess you're probably right. Sucks they would mark the front of the fan like that. Now I just got to figure the best way to clean it off of there, if possible to do without damaging the fan.

Simple, rubbing alcohol with a q tip, problem solved.
post #8 of 9
Thread Starter 
Quote:
Originally Posted by XAslanX View Post

Simple, rubbing alcohol with a q tip, problem solved.

Just tried it with 91% isopropyl, and after about 5 minutes of continuous scrubbing and wiping, and going through both ends of 2 q-tips in the process, I still didn't quite get rid of the mark on just one of the fans. It seems thick like a dab of paint with a paint brush more than it does a mark with a permanent marker.

It looks like these spots are going to be stubborn to remove. It's going to take something other than a q-tip with alcohol for me to do all of my fans.

Before:
Black ink dots on Gentle Typhoon fans


After:
Black ink dots on Gentle Typhoon fans

- - - - - - -
EDIT:
Cleaned up a few of the fans with smaller dots and they came off completely without as much trouble. That first one I picked was more troublesome because of how big and thick the ink dot was plus it's right next to one of the hub vent holes and I was trying to avoid getting any alcohol down in there.

I might be able to clean them all up going this route but there are several with big blots like that first one that are probably going to be stubborn. I think I am going to put it off doing any more until I get my hands on a bottle of Goof Off to see if it works any better.
Edited by Unicr0nhunter - 4/23/14 at 6:38am
post #9 of 9
All 9 of my AP-00s from the Group Buy had the same black marks. Probably just a QC indicator or something. Even after three light coats of spray paint, the markings are every so slightly visible if you know what you're looking for. Acetone or MEK would take the markings of easily.
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