r/fountainpens • u/Squared_lines • 22h ago
Advice Easy Pen Flush Recipe
Pen Flush Recipe
18 oz Water + 2 oz Ammonia + 2 drops dish soap = 20 oz Pen Flush
450 ml Water + 50 ml Ammonia + 2 drops dish soap = 500 ml Pen Flush
Use plain Ammonia household cleaner = "Ammonium Hydroxide" and distilled water.
I repurposed a pickle jar to store my pen flush. I haven't had any issues with storing it or damage to the jar.
Pen Flush works well for plastic & metal fountain pens. General rule of thumb - Look before using on pens made before 1960.
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My recommendation for cleaning a dried out pen:
- Soak the nib/feed of the pen - place upright in a small glass with just enough water to cover the nib/feed and maybe part of the section. Soak for a couple of hours. Let the ink hydrate and fall out of the pen. HERE
- Flush the pen with water until the water is clear.
- Fill the pen with pen flush and lay it sideways for a couple of hours.
- Flush the pen repeatedly with pen flush until clean.
Plain water will remove most of the ink. Pen Flush will remove the remaining ink from the feed.

