Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Ebonite / hard rubber adhesion and fountain pens

Ebonite / hard rubber adhesion and fountain pens

Ebonite / hard rubber adhesion and fountain pens


I'd like to find out more about why ebonite functions well as a "feed" for fountain pens. As you may know, fountain pens feeds are designed to convey the ink from the reservoir to the nib, and work through a combination of capillary action and gravity.

It's my understanding that capillary action works through adhesion between the liquid and the surrounding surfaces. Why should there be an appreciable adhesive force between a water based ink and a hard rubber feed? For that matter, why would a plastic ink feed work (as plastic is also used)?

If anyone can shed some light on the physical chemistry going on here, and/or suggest references, I'd appreciate it.



Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close