The bottle has the following embossed on the underside:
There are no visible dates on the bottle or the carton, but the following is stamped on the inner side of one of the carton flaps in black ink with silver shimmer--and it's difficult to read.
The ink itself goes down on the page in a cool-toned (with a very slight purple tinge) hue of medium saturation and then dries to a muted very slightly teal-tinted blue. The color change is gradual over the next day or so to what you see on the photographs. The final color of the ink is quite consistent with the bottle cap.
I can't explain why that is, but, subjectively, the color of this ink feels just right to me -- a classic.
The water resistance test was a wash under running water, 3 days after the writing was done. I really like the look of the paper towel "chromatography" -- medium blue fading to slightly more cyan vintage light blue to almost cream. The more ink is concentrated, the more the blue is shifted toward green, as can be seen on the Col-o-Ring card. There is some red-magenta sheen.
Not sure if I am going to hold on to both bottles yet--I got them out of curiosity, but it turned out that the ink inside was surprisingly good. And the bottle, along with the carton, look great on my desk. That "19 cents" printed price
Edited by Intensity, 06 August 2019 - 20:04.