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I placed an order for a bottle of Noodler's Blue Ghost back in March, when I saw it was offered at a good price. However, the retailer was unable to fulfil the order right away (and that's understandable), and when their order of inks came in from the US a month later but there was no Blue Ghost in sight, that was the last update I got, even though I told the staff there I still wanted a bottle of ink and wasn't letting them off the hook so readily. Then, I saw this other invisible ink in 18ml bottles on eBay, with no brand name or detail -- including whether it's safe for fountain pen use, much less whether it's "bulletproof" -- for just a few dollars and came with a tiny UV torch, I bought one just for the hell of it, even though the per-millilitre unit price is 220% of that of the Noodler's ink. However, since then I was able to order a bottle of Blue Ghost sold and delivered by Amazon US for a reasonable price, so I had confidence it was actually in stock. That order was delivered yesterday. (I have since cancelled my original order from the first retailer and got it refunded.) I wonder how many of us here would bother with getting two different invisible inks, even though we wouldn't blink an eye about ordering the sixteenth "different" shade of blue, or even coloured two inks that are supposed to dopplegangers of each other? Anyway, so here they are: Both are equally invisible on the page under normal lighting conditions, of course. Once dried, you can write on top of it with coloured inks, with minimal interference (feathering, etc.) and certainly not every place where two ink tracks cross, but there is nevertheless some with either of the invisible inks if you look closely. Neither of the inks are what I'd call waterproof (but they are fairly water resistant), which I guess precludes them from being "bulletproof". This is what they look like after a two-hour soak: Even though the Wing Sung 3008 into which I filled the Turritopsis ink has an EF nib, and the Sailor Profit Junior that holds the Blue Ghost ink has a MF nib, I don't expect the difference in the line widths to be substantial. What I'm finding, though, is that Blue Ghost has more of a tendency to spread once laid on the page. The paper in the Maruman m.memo DMP-A7 notepad I used there is not apt to be absorbent, and I was careful to cover the rest of the page with a paper napkin while I wrote, so as not to compromise the paper coating. (I can see from the washed out writing how fine or broad the contact surface from the nibs are. (Yes, I can test them properly against each other with a different ink, or even swapping the inks around in the pens, but right now I don't feel like cleaning them and flushing ink down the drain.) Between the lack of evidence to support the claim of being "bulletproof" (but I really should look up if there is any word definition and test procedure published by Noodler's), and the tendency for the lines to be broader than they need to be because of the spreading, I must say that the Blue Ghost ink has disappointed me, if so no-name ink (actually, there is one in 3-point Flyspeck on one side of the bottle label: Tramol) from China proves equally as water-resistant but seems to work better. Now, of course I don't actually trust or assume the Turritopsis ink to be perfectly fountain pen safe, so I'm not going to put it in a $200+ gold-nibbed pen, but then I'm not inclined to do so with Blue Ghost (or Noodler's inks in general) either; a Sailor Profit Junior which cost me twenty-odd bucks to acquire is about as much as I care to risk on a lark. Still, writing with invisible ink is fun, and more fun (and much easier!) when my order of UV bulbs for my desk lamp comes in. I can't wait to show the young'uns at the next Christmas family gathering, and I've already put in an order for some non-fountain pens that also dispense invisible, fluorescent-under-UV-light ink to give them -- and a couple of big UV torches for their parents; I'm sure they'll need those.

Hello y'all! I've been getting more and more into inks, and I've run across several that intrigue me, and several that I don't think I'll ever touch. One ink that piques my interest immensely is Noodler's Blue Ghost. Has anyone tried Noodler's Blue Ghost? What have been your experiences with it? -Charlie

Thank you everyone for being here reading my new ink review about Noodler’s Blue Ghost. http://s16.postimg.org/h86itr5b9/Bottle.jpg This ink is indeed a particular one on many aspects. I suspect that the original intent by Noodler’s was to create an ink invisible to normal light, which shines and stands out the paper only under UV light, without being the already seen highlighter colours. The result in my opinion is a partial success, because it’s visibility under UV light is strictly dependant to the paper you’re writing on. On 80 gsm cheap copy paper, and on Favini’s Schizza & Strappa paper, due to the particularly white finish, under UV light it’s likely to shine as much as the ink, making a real mess in trying to discern normal size words from the background. On the other side, on differently coloured paper, this ink is an absolute beauty. I’ve tried it on tracing paper and it was a great success, the glows really comes out in a light blue ghostly colour, which I enjoy a lot (I’ll keep that in mind for Halloween!). I suppose that, for the particular composition of the ink, this could be a great choice for writing on black cardboard, to create particular drawings or similar, I should give it a try). Coming back to the most usual features, this is quite a wet ink, takes ages to dry but flows without problems through my Lamy Safari and keeps up writing from the finer nib to the broadest. It’s really hard to see in my photos, but against all odds, this ink actually has a little shading, giving much more luminous points where the pen stops or slows down while writing. Another thing that has to be said, this ink behaves very well in terms of waterproofness. If soaked in the water the lines remains as brighter as before without fading. In the end, is this ink worth a try? This question is difficult to answer. It depends. If, like me, you like to spend some time on drawing, toying around with pens, if you have about any other colour of the visible spectrum, well, this ink can really be something different to experiment because it’s a lot of fun, especially on demonstrator pens. Is this ink something I really needed? Not really. It’s not an ink I’m going to bring at work, and it’s not going to be in my everyday carry so often. Probably, if you’re the kind of people who likes to buy work safe inks, but you still want to experiment a little of “UV friendly Inks” you can just get a Pilot Parallel fill it up with Pelikan Duo ink (Yellow or Green) and in this manner you’ll have a rechargeable highlighter which works fantastic even under the UV bulb. Hope you enjoyed, sorry for the bad photos (this ink is not scanner-friendly), and for any further questions on this ink, I’m ready to give you any answer you may need. FABRIANO COPY PAPER http://s16.postimg.org/cc2w2255x/Faviano.jpg FAVINI SCHIZZA & STRAPPA PAPER http://s16.postimg.org/ogi7cj6lh/Schizza_strappa.jpg TRACING PAPER http://s16.postimg.org/xhwqq54it/Tracing_paper.jpg WATER RESISTANCE ON TRACING PAPER http://s16.postimg.org/4410ak1t1/waterproof.jpg DROP OF INK ON KITCHEN TOWEL http://s16.postimg.org/ul9nwda5h/Blotch.jpg CROMATOGRAPHY http://s17.postimg.org/vbi4vn4nz/Cromatography.jpg http://s16.postimg.org/7brnovvdx/Artwork.jpg