The pH of Filofax Paper

Well today I sidetracked a little from my Essay book, to do some pH testing on Filofax paper. I had discussed this briefly with Steve from Philofaxy, and decided to try both the cotton cream paper and white paper. For accurate testing, I sampled five sheets of each and am showing my results below.


Cotton Cream
1: 7.6
2: 8.1
3: 7.9
4: 7.7
5: 8.1
Average: 7.9

White Paper
1: 7.2
2: 7.5
3: 7.2
4: 7.0
5: 7.3
Average: 7.2

So in conclusion, both papers are very close to pH neutral which is encouraging. The Cotton Cream is a little more alkali at 7.9 than the white paper.

Neither of them are verging on the acidic side which is good, and the white paper I have used is from 2003, so it has kept acid free for a substantial amount of time.

All in all – very encouraging!