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Pen Uno is a super slim all aluminum pen that uses the Hi-Tec-C Coleto gel ink cartridge.
Pen Uno is a super slim all aluminum pen that uses the Hi-Tec-C Coleto gel ink cartridge.
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1,004 backers pledged $40,557 to help bring this project to life.
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Pen Uno: The Most Minimal Pen project video thumbnail
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Pen Uno: The Most Minimal Pen

$40,557

1,004

minimal design
minimal design

MINIMAL DESIGN

Pen Uno is a most minimal pen designed to be both a pleasure to write with and beautiful to see. With only 5.3mm (7/32in) in diameter it is one of the slimmest pens ever manufactured, yet it is very comfortable to use because its holding barrel is slightly wider. This barrel also serves as a twisting cap that protects the pen tip when not in use. Pen Uno is precision-machined out of space-grade aluminum and anodized in four distinct colors: space grey, silver, gold, and rose gold. A fifth exclusive color in black is also available at certain reward levels.

side view
side view

Pen Uno uses the widely available Hi-Tec-C Coleto gel ink cartridge. This cartridge writes exactly the same as the regular Hi-Tec-C cartridge but it is much slimmer in diameter because it was designed for a multi-color pen system. Taking advantage of this super slim cartridge we were able to construct what we believe is one of the most minimal pens ever designed.

pen in use
pen in use

WRITING EXPERIENCE

In this video we show how the pen writes and the overall writing experience.

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MECHANISM

The holding barrel doubles as twisting cap to protect the pen tip when not in use. A few turns of the cap will reveal the pen to be ready to write.

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pen opened
pen opened
pen closed
pen closed
pen closed
pen closed
cap mechanism
cap mechanism

COLORS

Pen Uno is anodized in four subtle and elegant colors (dark grey, gold, silver, and rose gold). A special edition pen in black will be included when you get four pens.

pen colors: silver, dark grey, gold, rose gold
pen colors: silver, dark grey, gold, rose gold
body detail
body detail

COMPONENTS

The pen consists of four main components: the main shaft, holding barrel, end cap, and ink cartridge (Hi-Tec-C Coleto). The end cap of the pen can be removed using a flat head screwdriver to change the ink cartridge. You can also use any other flat object or even your nail.

components
components
components
components

INK CARTRIDGE

Pen Uno is designed to use the Hi-Tec-C Coleto gel ink cartridge which comes in a variety of colors and it is very inexpensive and widely available in stationary stores as well as online retailers like Amazon. The cartridge is very slim because it was designed for a multi-color pen system. We used that in our advantage to create a super thin pen. Hi-Tec-C Coleto cartridges come in 0.3, 0.4, and 0.5mm pen tips (the same sizes as the standard Hi-Tec-C).

Hi-Tec-C coleto gel ink cartridges
Hi-Tec-C coleto gel ink cartridges

SIZE COMPARISON

A comparison of Pen Uno with widely available pens. From top to bottom:  Pilot's Hi-Tec-C, Pilot's G-2, Steadler's Liquid Point, and Sharpie.

size comparison
size comparison

SPECIFICATIONS

  • All aluminum construction (anodized)
  • Length: 13cm (5 1/8in)
  • Width: 5.3mm (7/32in)
  • Weight: 10g (similar to a standard pencil)
all space-grade aluminum
all space-grade aluminum
details
details

WE NEED YOUR HELP!

After one year of research and tens of self-funded prototypes we need your help to place our first production order with our manufacturer. This is an exciting time as good design can go directly from designers to consumers. We hope you can give us the opportunity to make this pen for you.

REWARDS

$25 - only 99 available (gone)
1X Pen Uno (color of choice)
($20 off retail price of $45)

$25 - only 500 available
1X Pen Uno (color of choice)
($20 off retail price of $45)

$35
1X Pen Uno (colors of choice)
($10 off retail price of $45)

$50 - only 150 available
2X Pen Uno (colors of choice)
($20 off retail price of $45)

$60
2X Pen Uno (colors of choice)
($15 off retail price of $45)

$99 - only 150 available
4X Pen Uno + 1X Pen Uno Exclusive Black (5 pens total) (colors of choice)
($20 off retail price of $45)

exclusive black
exclusive black

$120
4X Pen Uno + 1X Pen Uno Exclusive Black (5 pens total) (colors of choice)
($15 off retail price of $45)

$240
8X Pen Uno + 2X Pen Uno Exclusive Black (10 pens total) (colors of choice)
($15 off retail price of $45)

STRETCH GOALS

If we reach the following funding goals:

$20K
Red color will be available to choose.

red unlocked
red unlocked

$40K
Everyone will receive a pen sleeve.

BACKGROUND

Ensso is a small design studio established in 2014 in Los Angeles, California. The studio is run by two designers trained as architects. Our main goal is to rethink everyday objects and transform them into beautiful pieces that inspire our world. The studio has received several recognitions including the Red Dot award, the Good Design Award, and the ICFF award.

Risks and challenges

We have been working on this pen for more than a year. Through this time we have pinned down every design detail and manufacturing process. We have produced tens of prototypes which have helped us to better understand every aspect of the product. The pen is now ready for production and we have secured a top of the line manufacturer that specializes in precision metal components.

Our main challenge is to achieve our funding goal and be able to place our first production order. Your help is essential and we will be very grateful.

Please let us know if you have any questions. We are looking forward to creating this pen for you!

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Support

  1. Select this reward

    Pledge US$ 25 or more About US$ 25

    1X Pen Uno (color of choice)
    ($20 off retail price of $45)

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    Limited 582 backers
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  2. Select this reward

    Pledge US$ 35 or more About US$ 35

    1X Pen Uno (color of choice)
    ($10 off retail price of $45)

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    18 backers
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  3. Select this reward

    Pledge US$ 50 or more About US$ 50

    2X Pen Uno (colors of choice)
    ($20 off retail price of $45)

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    Ships to Anywhere in the world
    Limited 135 backers
    $

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  4. Select this reward

    Pledge US$ 60 or more About US$ 60

    2X Pen Uno (colors of choice)
    ($15 off retail price of $45)

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    20 backers
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  5. Select this reward

    Pledge US$ 99 or more About US$ 99

    4X Pen Uno + 1X Pen Uno Exclusive Black (5 pens total) (colors of choice)
    ($20 off retail price of $45)

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    Estimated delivery
    Ships to Anywhere in the world
    Limited 139 backers
    $

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  6. Select this reward

    Pledge US$ 120 or more About US$ 120

    4X Pen Uno + 1X Pen Uno Exclusive Black (5 pens total) (colors of choice)
    ($15 off retail price of $45)

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    Ships to Anywhere in the world
    7 backers
    $

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  7. Select this reward

    Pledge US$ 240 or more About US$ 240

    8X Pen Uno + 2X Pen Uno Exclusive Black (10 pens total) (colors of choice)
    ($15 off retail price of $45)

    Less
    Estimated delivery
    Ships to Anywhere in the world
    1 backer
    $

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  8. Reward no longer available

    Pledge US$ 25 or more About US$ 25

    1X Pen Uno (color of choice)
    ($20 off retail price of $45)

    Less
    Estimated delivery
    Ships to Anywhere in the world
    Reward no longer available 99 backers
    $

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Funding period

- (15 days)