The Platinum Karakusa Blue Celluloid fountain pen features a hand-engraved silver-filled pattern on a blue celluloid #3776 body with rhodium-plated trim. Throughout the predominantly blue celluloid is a varied blend of black and white marbling.
Celluloid is rare in modern fountain pens, due to the difficulty of making this material. It is flammable, half transparent plastic material which is made by mixing nitric-cellulose (sulfuric acid and nitric acid are added to cellulose), camphor and alcohol. Celluloid softens at 90 degrees Celsius and hardens when cooled. After the celluloid is made and allowed to cure over many months, the entire body and cap of this pen is then hand engraved with a floral motif, using the Japanese Chinkin technique. The engraving is then filled in with a metallic silver powder.
It accepts proprietary Platinum cartridges or a Platinum converter for use with bottled ink (both are included), and features a rhodium-plated 14k gold nib.
Click here to shop all compatible Platinum ink cartridges.
- Fountain Pens
Whether or not the barrel of the pen is translucent, allowing you to see the ink and filling mechanism inside.
- Body Material
- Cap Rotations
For pens with a screw-cap closure, how many rotations it takes to uncap/recap the pen.
- 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).
- Compatible inks & refills
Which ink this pen will accept. Choices include bottled ink and various styles of pre-filled ink cartridges.
- Bottled inks, Proprietary ink cartridges
- Filling Mechanism
How the pen fills with ink. Click here to watch our video tutorial on common filling mechanisms.
- Cartridge, Converter
- Grip Material
- Nib Size
- Fine, Medium, Broad
- Nib Color
- Nib Material
- 14kt Gold
Whether or not the cap fits securely onto the back of the barrel when open.
Whether or not the nib/tip can retract into the body of the pen (usually for click or twist-open style pens).
- Diameter - Body
- 11.9mm (0.47in)
- Diameter - Cap (without clip)
- 14.6mm (0.57in)
- Diameter - Cap (with clip)
- 16.8mm (0.66in)
- Diameter - Grip
Measured from the place most people choose to rest their fingers, which varies with each pen.
- 10.0mm (0.39in)
- Length - Body
The measurement from the back end of the barrel to the tip of the nib.
- 117.3mm (4.62in)
- Length - Cap
- 67.6mm (2.66in)
- Length - Nib
The measured length of the visible portion of the nib when it is installed in the pen, from grip to tip.
- 21.7mm (0.85in)
- Length - Overall (Closed)
- 136.5mm (5.37in)
- Length - Overall (Posted)
When the cap of the pen is posted onto the back of the pen body, this is the measurement of the entire pen including the nib.
- 146.6mm (5.77in)
- Weight - Body
- 14.0g (0.49oz)
- Weight - Cap
- 10.0g (0.35oz)
- Weight - Overall
- 24.0g (0.85oz)
- Max Ink Capacity - Cartridge
The maximum volume of ink that can fit in the pen when using a cartridge.
- Max Ink Capacity - Converter
The maximum volume of ink that can fit in the pen when using a converter.