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In keeping with my theme of doing things because I was told I can't... Parker Superchrome Jade Green! Yes, the slightly LESS deadly ink invented to replace Parker "51" ink! If you are not familiar with Parker "51" ink and the story behind it, please feel free to see my reviewsTunis Blue: https://www.fountainpennetwork.com/forum/topic/354212-parker-51-tunis-blue/?hl=%2Btunis+%2BbluePan American Green: https://www.fountainpennetwork.com/forum/topic/353661-parker-51-pan-american-green/?hl=%2Btunis+%2Bblue So, now that everyone knows why "51" ink had to go the way of the dinosaurs, let's take a look at its replacement!Launched around the same time as the new Aero-Metric (1948ish) version of the Parker "51" pen, the advertising for Superchrome was VERY bright and vibrantIt even went as far as to explain how this magical ink would soak into the paper and dry nearly instantly, instead of by evaporation!Here's the patent: https://patents.google.com/patent/US2528390NEAT! Ok, so what happened then? Why is this called the "slightly less deadly" ink? and why can't i find it in stores!? Because it was discontinued in 1956 ok, but WHY!? Well, Parker started getting warrantee claims on their new Aero-metric "51"s... a lot of them... seems the alkalinity of Superchrome was actually eating up breather tubes!And they were made of STERLING SILVER... eventually, replacing them starts to get expensive ya know! you can read more about "51" and Superchrome here:http://www.richardspens.com/ref/care/51_ink.htm My Bottle is a slightly later bottle, the first ones came in a cool metal tin! According to the Parker "51" book, my box was designed around 1949And was awarded an honourable mention by the Folding Box Association of America! Wow... really!? the FBAoA!? no way! Yes way! it says so on page 145 of the Parker "51" book! here is my box and bottle pictured with my green Parker "51" Special Demi There was some sedimentation in the bottle, much like the Tunis Blue bottle, but much less of it, and not stuck to the bottom of the bottle.As with the Pan American Green, don't worry, I shook the bottle excessively in order to try and get those precious dyes back into suspension (not solution)! ok, but what does it look like on paper you ask? well I'm glad you asked, cause that's the whole point of this shindig! (Typed Text follows for search-ability, and because my handwriting is atrocious!) Rhodia Webnotebook, paper is slightly off white in real life 15 Jul 20Parker Superchrome JadeGreen. Bought 3oz bottleon eBay Jun-ish 2020. Thisis the second deadliest inkin history. Only the inkit replaced (Parker "51") isworse! Meant to "dry" nearly instantly it was designedto soak into the paper. Toobad it also ate sterlingsilver breather tubes...More teal than Green, buthat may be due to the age of the bottle. Some dryout when left over night in a pen(Dry times in a Wing Sung 601 and a TWSBI Eco 1.1)Would buy Again?N/A Parker SuperchromeJade GreenEco 1.1mmWing Sung 601Shading: Good/Very GoodSaturation: GoodFeathering: NilSpread: NilBleed: NilCleaning: Easy/Medium (Water tests, dripped and dabbed vs rubbed with a wet Q-tip) Notes: Colour is very close to Diamine Marine. FlowsOK. Pan American Greenis much greener.*Leaves a white crust/residue! (On the feed and nib, Seen well after cleaning and drying the Eco. So that white residue on "51" Feeds? yeah... probably from this ink!) Clairefontaine Notebook paper, paper is VERY white Parker SuperchromeJade GreenTwsbi Eco 1.1 mm stubThe quick brown fox jumps over the lazy dog.1234567890Clairefontaine PaperDry Times 30 25 20 15 10 5 1Wing Sung 601Drytimes: 30 25 20 15 10 5 1 The quick brown fox jumps over the lazy dog1234567890 Parker SuperchromeJade GreenDiamine MarineJade Green Marine So that's it. That's Parker Superchrome Jade Green. It's a lot like Diamine Marine, except you know, super expensive, hard to find, and will kill your pen!While also leaving a weird white residue on your nib and feed... yay!