Disclaimer: I enjoy doing mini ink reviews for my personal reference, and I'd like to share them with others if they might be of help to gain an insight into the ink's appearance and performance. I generally don't have time to put together super comprehensive reviews, like some of our fantastic reviewers here do (thank you so much for your hard work!), but hopefully these mini reviews will still be useful as another point of reference.
Lamy releases limited edition color inks and accompanying Safari or Al-Star pens annually. Petrol was a 2017 special edition color for textured Lamy Safari with black hardware and nib, and this ink. Because Lamy only made a fairly small amount of this ink, it quickly sold out and became somewhat of an unobtanium (in truth it is still available, but be prepared to pay 3-6 times the original $12-per-bottle price of this ink on eBay or classifieds boards). I hope Lamy will eventually bring this ink back. I have 3 bottles stocked up and sadly had to pay extra for each one, but I believe this is a great ink that should be made freely available to anyone who is interested--not only because of its color, but also because of its performance.
This ink is a saturated green-teal-black with a matte finish on paper. It has some shading in broad or dry nibs, but mostly it is fairly uniform in fine nibs. There is a red-black color-shift where sheen develops, and the metallic component of the sheen is a kind of light pink in color. In practice, it is very difficult to see the metallic sheen from this ink, unless you are writing with a wet pen on Tomoe River, and even then you will not see it much. The red-black color shift is more readily apparent in larger concentrations.
The degree to which this ink will look more or less green is highly dependent on illumination and paper used.
This ink has moderate flow, one can produce fairly fine hairlines with this ink. It is well lubricated. In my experience it has tamed some difficult nibs and poor performing pens (generally they have something wrong with their nib grinds or alignment) that skip much less or not at all with this ink.
One of the properties of this ink that I like is that it removes staining from converters and cleans ink windows, if you let it sit in a pen for a couple of weeks.
Water resistance is moderate: a legible black-gray line remains, but there's some smeary wash of dyes that are lifted, so be careful to dab wet paper quickly. No feathering on good paper.
I think this ink also makes a good candidate for water brush art. As you can see on the water test rectangle, there is some range of hues that the ink can produce in [more] capable [than mine] hands.
Papers used in this review are:
Fabriano Bioprima 4mm dot grid - a kind of ivory color, lightly textured, uncoated
Rhodia Dot Pad 5mm dot grid #16 - bright white (perhaps with a slight lavender tinge)
Nakabayashi Logical Prime notebook - coated and super smooth ivory-toned Japanese paper, shows things like sheen and hue variation pretty well
Tomoe River 52g "white" - off-white slightly ivory Japanese paper which shows sheen and shading very well
Col-o-Ring sample paper - bright white and thick
Rhodia Dot Pad:
Color comparison on Nakabayashi Logical Prime notebook paper:
Edited by Intensity, 18 December 2019 - 20:16.