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Building Tips and technical articles. => Paint and finishing => Topic started by: t michael jennings on April 12, 2013, 12:01:30 PM

Title: Rapidograph Pen Set
Post by: t michael jennings on April 12, 2013, 12:01:30 PM

Gentlemen,

I purchased a full set of Koh-I-Noor Rapidograph Pens at an estate sale.

The owner failed to clean out two of the pens.  Unfortunately, I was not able to contact him and ask for advice.

What is the best solution to soak the pens to dissolve the dried-up ink in the pens.

The set contained Koh-I-Noor "Waterproof Black India RDS" ink.  I assume that is the type of ink dried in the pens.

Thanks for the helping hands that is sure to come.


T Michael Jennings            y1
Knoxville,  TN

Title: Re: Rapidograph Pen Set
Post by: Derek Barry on April 12, 2013, 12:34:57 PM

Try warm water first. If that does not work try rubbing alcohol.

Derek

Title: Re: Rapidograph Pen Set
Post by: RC Storick on April 12, 2013, 12:42:27 PM

hot water and a ultra sound if you have it. If not just hot water.

Title: Re: Rapidograph Pen Set
Post by: Joseph Lijoi on April 12, 2013, 01:39:34 PM

http://www.ehow.com/how_4597789_unclog-rapidograph-pens.html

Title: Re: Rapidograph Pen Set
Post by: Glenn (Gravitywell) Reach on April 12, 2013, 11:44:35 PM

Yep, been there done that!  Soak in hot water, then work nib inside the pen barrel till it is clear.  Its really the only way. H^^

Title: Re: Rapidograph Pen Set
Post by: Tom Niebuhr on April 16, 2013, 05:27:47 AM

We have a drafting supply place in Carrolton TX that has been in business forever. They recommended using Windex, not the cheap window cleaners. This works better than the Koh-I-Noor cleaner.
I general completely disassemble the pen. Be very careful with the moving plunger.  Use an ultra sonic cleaning unit. Patience is the key.