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These syringes are exactly what I was looking for cleaning and refilling fountain pens, converters and cartridges. The blunt needles are small enough to store in the syringe for easy transport and storage. If this is why you are buying these it would be an excellent choice for you.
I have a few eyedropper pens. I have used eyedroppers to fill them, but that was fairly messy and inaccurate for me. So I bought these.
I've used one syringe so far to fill a few pens. It worked very well. Big points for that.
The only reason this gets four stars instead of five is because the syringes don't have covers. So if you get these, just be careful not to jab yourself. They're not incredibly sharp, but they're still pokey, by nature.
Why use an expensive ink-converter that's going to fail when you can just refill the plastic cartridge already in the pen? I started doing this with Rotring drawing pens because the ink cartridges that they supply have about six drops of ink in them. Now I just fill them up with Higgins fountain-pen India ink and they're good to go. Works for Schaefer calligraphy pens too.
A very good friend on mine is crazy about fountain pens. He appreciates quality pens and is particular about the ink that goes in them. The syringes allow him to refill empty cartridges with his preference of ink. When I last spoke with him he was recharging a cartridge with his favorite green ink. I highly recommend these syringes.
I was making a terrible mess trying to fill my converter before these (funny thing is that I was using UV ink so it was an invisible mess but if SIU shined their lights on my hands they would have pegged me for a pervert or something)
I didn't have any instructions on how to use these to fill the cartridge so I did still make a mess the first time I used them but after I figured out where to stick that needle all was well and I get about a 110% fill (Pilot says that's okay) on the cartridge compared to the 50% I was getting before.
good size and worked well for ink transfers for the first couple of times, then the measurement markings started to bleed and disappear. While it does say "discard after use" but I suspect most of us using it for ink mixing will plan on wash and re-use. These are no good, as after a wash or two, you can't read the measurements anymore.
These are perfect for use in cleaning and filling fountain pens, and it is nice to have extras on hand in case the plastic syringe part gets picked up by a cat from the countertop where it was drying and is used as a toy, causing it to be punctured by the cat’s teeth. Not an entirely hypothetical situation, from my personal experience.