Hello. It was very busy summer, which unfortunately is nearly finished. Due to amount of day job workflow I had, I was a little bit quiet on ClumsyPenman site recently. But it does not mean, that I was not working on my reviews. In fact, I was working a lot and I will be posting many hopefully interesting things in next coming weeks. Today is one of them. Platinum Classic Series Inks. I hope you will enjoy it. Here it is.
Earlier this year Platinum has announced and introduced set of six new inks which really brought my attention. Most of the colours in the new ‘Classic’ line are earthy and natural looking muted shades of green, brown, sepia, burgundy and yellow, which I really like. There is no secret that I love earthy colours. There is something cool about them and they usually look adorable on creamy/ivory toned paper….somehow ‘vintage’.
Another very interesting thing about this series is the fact that according to the Platinum all of the inks are manufactured by the ‘traditional methods’ and more importantly they are gradually darkening overtime. This obviously screams – ‘Iron Gall’ inks, however Platinum never used this term on their website. I am not entirely sure how Platinum synthesize these inks but in the nut shell ‘iron gall’ inks are obtained from the chemical reaction of tannins extracted from galls (for instance oak) and aqueous solution of iron (II) sulfate. Because formed Fe(+2) complex is quite unstable in oxygen condition the iron Fe(+2) atoms oxidise quickly to Fe(+3) which manifests by ink darkening. This effect is very similar to rust formation and corrosion we see around very often. To improve flow and other physical and chemical properties binders such as Arabic gum, stabilisers, anti-mould reagents are often used.
This is an example how oxydation process occurs and how it is affecting the colour (note the video speed is 2x)
In general iron gall inks need to be used with caution, because their acidic pH can make an effect on metal parts of the pen (steel nib, metal section, etc). It was really a problem the past, but nowadays IG inks are significantly less ‘corrosive’, however I do not have any experimental pH data for this particular set so can not say for sure. As a general rule is rather recommended to maintain pen regularly (use and clean). It is also suggested not to use very expensive pens either. For more information about Iron Gall inks I would highly recommend to check irongall.org website.