IMG 8575.JPG
Project data
Authors Ebumba
Max Pletcher
Completed 2016
Made? Yes
Replicated? No
Cost USD $ 0.68
Instance of Charcoal pen
Export to Open Know How Manifest
Page data
Type Project
Keywords 3D printing, charcoal, osat, writing tools, school supplies, Plastic
SDGs Sustainable Development Goals SDG04 Quality education
SDG09 Industry innovation and infrastructure
Authors Max Pletcher
Kathy Nativi
Published 2016
License CC BY-SA 3.0
Affiliations Principia College
Language English (en)
Page views 155


This charcoal pen is useful in developing countries as some school supplies cannot be found and afforded in low class towns and villages. This pen was designed as a benchmark design for solving that problem! This project is in response of the OSAT project, projects that are meant to change the world for the better. It is still in development and should be tested more as well as possibly edited in its design if need be.

2. Photo[edit | edit source]

Bill of Materials[edit | edit source]

  1. Filament:
  • Bolt: 20g @ $20.1294 / kg - $0.40
  • Pen Shaft: 14g @ $20.1294 / kg - $0.28
  • Total Filament: 34g @ $20.1294 / kg - $0.68
  1. Charcoal from a fire or some type of colored powder or paste. (Darker the better)
  2. Total Cost: ~$0.68

SOURCE AND STL FILES[edit | edit source]

Fabrication of the OSAT: Tools[edit | edit source]

  1. MOST Delta RepRap or similar RepRap 3-D printer
  2. Spool of PLA or similar printing plastic

Skills Needed to Build OSAT Project[edit | edit source]

  • No Special Skills or knowledge required

Technical Specifications and Assembly Instructions[edit | edit source]

  1. Print Settings
    1. Bolt: 60% infill, 0.2 mm layer height, important to have high infill for maximum strength. Print Vertically for best results
    2. Pen Shaft: 10% infill, 0.2mm layer height, Print Vertically for best results
  2. Print Times (Varies)
    1. Bolt and Pen Shaft Printed Together: 1 hour 55 minutes
    2. Overall Time: 1 hour 55 minutes
  3. Assembly
    1. Assembly Time: time ~5-15min
    2. Take any charcoal or coal that you have available and crush it into a semi chunky powder/paste. Make sure that it retains its color so that it will show up on paper. Next take the charcoal and insert it into the end of the pen. Once this is completed, take the Bolt and begin threading it into the pen. Once the charcoal/ powder leaves the vessel, it is ready to use.

Common Problems and Solutions[edit | edit source]

  • Make sure to print the bolt with a high infill for maximum strength. This helps break down the charcoal as well as keep the pen in shape.
  • If there is a file on this project is unsatisfactory to your liking, please edit the attached files to your liking and upload to this page!

References[edit | edit source]

  • Part of Design uses part from user ForrestChandler on Thingiverse, you can find his part here:| Thingiverse Link
  • Software Packages used include and are limited to Blender and FreeCad

Gallery[edit | edit source]