Obviously the ballpoint will write on any paper without any bleed-through issues, they are very portable, the refills last months sometimes longer.
The fountain pen is a little more tricky, I've certainly had them leak in the past. But of more concern to Filofax users is their performance with the currently available paper.
At the weekend I tried out a couple of fountain pens on some of the different paper I have here:
- Filofax 'white' 70 gsm - As we know there was some bleed-through, not major but potentially annoying
- Filofax 'coloured' 70 gsm - No bleed through, it performed even better than the white paper and I was quite surprised at this, but I will come back to this paper in a moment.
- Filofax Cotton Cream - Excellent with my sample fountain pens, although the ink did take longer to dry on this paper.
- Rohdia 80 gsm jotter pad - no bleed-through and it takes the ink well no feathering
- Datacopy 80 gsm copier paper - No bleed-through issues, but the ink did feather a little.
- 'Bristol' paper, although this is in excess of 100 gsm, no bleed through and no feathering, it even performs well with solvent heavy CD marker pen without bleeding through! But you won't get many pages of this weight in to a Filofax.
I jotted this down then promptly forgot about it until I saw a You Tube video at the weekend and the person on the video made a similar comment that the coloured paper performs better than the thin white Filofax paper, it jogged my memory.
The realm of 'Fountain Pen Friendly' paper is quite a difficult problem to solve. The paper has to not absorb the ink too much, yet it has to be receptive to it so that the ink dries quickly on the paper, this is particularly important for left handed users if they are going to avoid smudging what they have just written with their own hand.
My tests weren't exactly scientifically performed or conclusive but having seen others make similar observations I don't think they are too far wrong. The performance of the thin paper might vary with the type of ink used? But the coloured Filofax paper was the surprise of this test.
Have you tried different ink on different papers to see if it makes a difference?