Product Description We have test many kinds of writing utensils on it, and as we have said, it passed the test, no bleeding through and no feathering. Fine and medium fountain pens, rollerball pens, gel pens, ballpoint pens, pencils of course, and even fine, medium and flat felt-tip pens are totally friendly with it. Markers are not included, of course, but we are sure that markers are not friendly with the majority kind of regular writing paper. We admit that the quality of the ink used by these pens and the amount or speed of output when writing affects the test results. BUT what we have to say is that this notebook CAN feed the regular writing needs. A spiral bound book can fold all the way back upon itself and yet still remain flat, so it provides for easy reference while taking up minimal room on a desk or table You can have a try, then decide to keep it or not. We believe that it will not let you down, and we hope that we have the chance to serve you. Basic Info: Item type: Spiral notebook Dimensions: A5, 5.78.27 Weight: 0.5lb Material: Paper + PP FEATURES: Prime quality spiral notebook Thick pp hardcover, 120 sheets (240 pages) cream lined paper, 5 colored/ decorative Dividers with Tabs A5 Notebooks and Journals is Lightweight and portable 5 subject and spiral bund/ wirebound notebooks