English: Lamy Fountain pen (using Lamy Z 50 EF (Extra Fine), F (Fine) and 1.1 (1.1 mm calligraphic stub italic) nibs writing samples written with blue-black Ecclesiastical Stationery Supplies Registrars Ink iron gall based fountain pen ink on copier paper. The top line was written first, the bottom line was written last. Ecclesiastical Stationery Supplies Registrars Ink is acidic (pH ≈ 2.0) and can be stored for 2 to 3 years at a reasonably even temperature, away from a heat source and direct sunshine/light. Direct sunshine/light will cause the ink to break down and throw a sediment.