Eel Turquoise 3 oz fountain pen bottled ink by Noodler's Ink® [Eel series]
All "Eel" inks are bulletproof/waterproof. "Bulletproof" refers to any Noodler's Ink that resists all the known tools of a forger, UV light, UV light wands, bleaches, alcohols, solvents, petrochemicals, oven cleaners, carpet cleaners, carpet stain lifters, and of course...they are also waterproof once permitted to dry upon cellulose paper. Some inks are more bulletproof than others - generally in descending order (most bulletproof with the most testing - to less bulletproof): blacks, blues, yellows, invisible ("blue ghost" and "White Whale"), greens, browns, purples, reds....all are equally bulletproof with one exception: the resistance to strong industrial bleaches to the point where the paper structure itself decomposes. Reds are prone to more fading when exposed to strong bleaches (sometimes fading to a yellow) than the other colors.
For specific ink properties, we will refer you to the following Noodler's Ink® url:
In an attempt to keep costs down, Noodler's Ink has opted to use plastic bottles rather than the current glass bottles which have been most difficult to obtain. The most important product, is, of course the ink. You will now be receiving a slightly higher volume of ink with less risk of breakage without any price increase.
The new plastic bottle now will have more than 3 oz of ink!
It is uncertain when Noodler's Ink will be offered in a glass bottle container.