How to Test Gel Pens for Show-Through and Bleed-Through

A mark visible from the back of a page is not always ink that has passed through it. Show-through is the writing visible through the paper; bleed-through means ink has reached the reverse surface. Testing both separately helps you decide whether a pen works for your notebook before you write a full entry.

A simple, repeatable test

  1. Use a spare page near the back of the notebook, or a sheet from the same notebook.
  2. Write the pen name, date, and paper type at the top.
  3. Make the same short line, small filled-in circle, and a few quick loops. Avoid pressing harder than you normally write.
  4. Let the ink dry fully, then inspect the front for feathering and the reverse for raised or wet spots.
  5. Hold the sheet toward a light source to check for show-through separately.
  6. Repeat with the pen you already trust, using similar pressure as a reference.

What the result tells you

Faint lettering visible through a clean reverse side is show-through; you may still be comfortable writing on both sides. Coloured marks or rough spots on the reverse indicate bleed-through, so consider using only one side, choosing a different pen, or using a different notebook. Let the ink dry before judging; a wet line can look worse than the finished page.

Paper weight is only one part of the result. Surface, coating, ink flow, and how much ink a stroke deposits can all matter. Our notebook paper GSM guide explains what a paper-weight number can—and cannot—tell you.

Choose a pen to test, not a result to assume

The ROSYPOSY Angelic Wings Pearlescent Gel Pen Set is one current gel-pen option in the store. Paper performance varies, so use the test above with your own notebook rather than assuming a particular pen will behave identically on every page.

ROSYPOSY Angelic Wings Pearlescent Gel Pen Set
ROSYPOSY Angelic Wings Pearlescent Gel Pen Set

Explore the Pen collection for available writing tools.

FAQ

Is show-through the same as bleed-through?

No. Show-through is visible from the opposite side but has not penetrated the sheet. Bleed-through has reached the reverse surface.

Should I test on a finished journal page?

Use a spare page or an inconspicuous area first. Test the paper and pen combination you actually plan to use.

For a technical discussion of paper and ink test methods, see Georgia Tech’s paper on show-through and bleed-through testing.

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