TWSBI Diamond 580 Fountain Pen - Iris - The Goulet Pen Company
TWSBI Diamond 580 Fountain Pen - Iris
The TWSBI Diamond 580 comes with a benchmark piston ink-filling mechanism and has all detachable parts.
This fountain pen features a clear demonstrator body with rainbow-colored iridescent trim and a stainless steel nib accented with iridescent color. The clear demonstrator barrel allows you to see your ink color and remaining ink level. It has a clear grip section and screw-cap, and is presented in a modern clear display case.
The idea behind the TWSBI Diamond 580 was to go back to basics and capture the simplicity and elegance of traditional writing instruments. In recent years, the development and modernization of writing instruments has resulted in traditional writing instruments, such as fountain pens, falling into obscurity. It was TWSBI's goal to bring the past back to life by creating a traditional fountain pen that even modern day society can appreciate.
The TWSBI Diamond 580 is a classic fountain pen with a piston ink-filling system. By fusing the traditional mechanisms of the fountain pen with a modern industrial design, TWSBI has created an eye-catching fountain pen that is simultaneously appreciative of the past and relevant in the present.
TWSBI's belief is that it is important to allow the user to disassemble and reassemble the pen and completely experience the traditional aspects of owning and using a fountain pen. These pens also come packaged with a wrench and silicone grease. Neither of these accessories are intended to be used immediately, as they are for long-term care and maintenance. Additionally, please use extra care if you choose to disassemble the nib and feed, as the feed is very fragile.
- Condition
- New
- Brand
- TWSBI
- Type
- Fountain Pens
- Color
- Clear
- Demonstrator
Whether or not the barrel of the pen is translucent, allowing you to see the ink and filling mechanism inside.
- Yes
- Body Material
- Resin
- Cap Rotations
For pens with a screw-cap closure, how many rotations it takes to uncap/recap the pen.
- 1.25
- Cap Type
How the cap is opened/closed from the barrel of the pen. Some common options include Snap-Cap, Screw-Cap, Magnetic Cap, or Capless (no cap).
- Screw-cap
- Compatible inks & refills
Which ink this pen will accept. Choices include bottled ink and various styles of pre-filled ink cartridges.
- Bottled ink
- Filling Mechanism
How the pen fills with ink. Click here to watch our video tutorial on common filling mechanisms.
- Piston
- Grip Material
- Resin
- Nib Size
- Extra-Fine, Fine, Medium, Broad, 1.1mm Stub
- Nib Color
- Rainbow, Silver
- Nib Material
- Steel
- Postable
Whether or not the cap fits securely onto the back of the barrel when open.
- No
- Retractable
Whether or not the nib/tip can retract into the body of the pen (usually for click or twist-open style pens).
- No
- Trim
- Rainbow
- Diameter - Body
- 13.3mm (0.52in)
- Diameter - Cap (without clip)
- 14.4mm (0.57in)
- Diameter - Cap (with clip)
- 18.6mm (0.73in)
- Diameter - Grip (mm)
Measured from the place most people choose to rest their fingers, which varies with each pen.
- 10.0mm
- Length - Body
The measurement from the back end of the barrel to the tip of the nib.
- 130mm (5.12in)
- Length - Cap
- 60mm (2.36in)
- Length - Nib
The measured length of the visible portion of the nib when it is installed in the pen, from grip to tip.
- 19mm (0.75in)
- Length - Overall (Closed)
- 142mm (5.59in)
- Weight - Body
If a converter is included with the pen, this weight is reflected in the total.
- 14g (0.49oz)
- Weight - Cap
- 14g (0.49oz)
- Weight - Overall (g)
- 28.0g
- Max Ink Capacity - Piston Vac
The maximum volume of ink that can fit in the pen when using the built-in piston or vacuum filling mechanism.
- 1.98ml
Love the color of this pen and the quality.
It's been great.
New favourite pen. Haven't drawn with anything else since it arrived
Very enjoyable to write with and striking to look at. comfortable in my hand, two turns to uncap, very easy to fill. Would definitely purchase again.
The TWISBI Diamond 580 pen is amazingly beautiful, and writs like a dream. Thank you Goulet pens for the great customer service!
It's very fine and you feel friction as you use it but it's not unpleasant. If you like the feel of writing over smoothness this extra fine nib is for you. It can also give very fine details. It's also very pretty.
Wow, my first TWSBI in EF. It is a beautiful pen and the ink flow is just lovely.
This is a beautiful pen that writes well, especially for its price point. I’m using it daily and the ink flows, it feels good on the paper, and it’s just gorgeous. I love it.
I love this pen! Great weight and feel. Seeing the ink inside is just a bonus. Just be aware it will not fit in a sample ink tube, you’ll need another vessel.
Love twisbi
This TWSBI Iris is simply GORGEOUS! Period. Photos do not do it justice. IMO it is worth the price. I got a nib. It’s smooth and offers a pleasant writing experience.
It leaks when you accidentally twis the pen :( but the handwriting is so smooth
Struck by the color and how smooth it writes. I don't know much about pens because this is the second one I ever bought. It is way smoother and not as scratchy sounding than my other one.
This was my first TWSBI but it was so beautiful I had to have it. I love it so much! It is easy to use, has a huge ink well, wrote smoothly right iout of the box, and is a pleasure to use! You can't post the cap but the length and weight of the pen are perfect without it. Highly recommend to anyone thinking about getting one!
This was my most expensive pen buy to date, but totally worth it! I really, really love it. It's so beautiful and holds so. Much. INK! Even though I'm tempted to keep it nice and pretty, it is 100% the pen I reach for the most consistently. I usually keep Rohrer and Klingner's Solferino ink in it, but it hasn't given me trouble with any ink I've put in it. I got a fine nib, which has been perfect for me.
My only complaint is that either because of the material it's made out of or because it's clear, it seems to sometimes accumulate oils from my hands (and therefore dust), which is annoying to clean off.
So far so smooth! Using with Lamy dark lilac. Nothing negative to say so far.
Absolutely love this pen so far! Aside from just being plain pretty to look at, it feels well balanced in my hand and writes like a dream. I opted for a medium nib, as I sometimes find fine nibs to be a bit scratchy or affect the ink flow, after a week solid of daily use, this pen is becoming the one I reach for more than my other fountain pens!
I have a TWSBI Diamond 580 already, but when I saw the Iris in all its glorious colors, I knew that it was time to reclaim the rainbow the Creator gave to us as a sign of His everlasting covenant with every living creature. I carry it with me for general use and note taking. It writes very well (Fine) on ordinary paper and is a pleasure to use.
This is the second time buying this pen. I had to give my last one to a friend who fell in love with it after only one use. The larger nib size seems to make for smoother writing. The faceted body is beautiful and the ink capacity is nice if you don't grow weary of writing for months in the same color. Really, that is the only problem I have with this wonderful pen...deciding what color to use.
TWSBI 580 is my favorite model of TWSBI. I now own three 580s and all are perfect for everyday use. Filling and cleaning are straightforward and simple. I don’t use the broad nib as much as my mediums, but all are smooth and flow well. The Iris stands out with any ink color, even traditional blues or black.
Wonderful fountain pen. This is my second TWSBI Diamond 580 Iris. The cap suddenly broke apart on my first one. I hope that doesnt happen with this one since they are not cheap. I really like this pen though.
Love the look, feel, weight, and smooth writing of the pen. It is a home run
A sweet writing pen!!
Gorgeous pen! I simply love it!
I can definitely say I was influenced by YouTube and Tik Tok to purchase this pen. Im extremely happy with this pen. It's beautiful in every light!
Writing is smooth.
Excellent pen…very happy and love the broad nib.
This pen is all I imagined it to be. I thought about buying this pen for quite a while, then decided to go for it. No regrets at all. Thank you Goulet pens for being my go to pen guru!
Beautiful pen !!
Wonderful pen, large ink capacity, and such a smooth writer. It's the first pen in my Fiancè's collection above $50 and she absolutely adores it.
