SHANGHAI HERO LIGHT INDUSTRIAL IMP. & EXP. CO., LTD is the owner of “HERO” and “DOCTOR” brands of fountain pens in China. The brand is well known in China and around the world. You may find it interesting to know that in Poland in seventies and eighties of the last century Hero fountain pens were ones of very few available on the market. Therefore a lot of people in Poland, especially senior ones, share sentiment for this company and it’s products.
Apart from pens and other products company offers also inks. It seems the colors available at the moment are Red, Blue, Blue/Black and Black but I may be wrong. They offer a wider variety of colorful inks in China. I ordered some on Taobao but haven't received them yet.
Fabri00 sent me samples of some inks and there were two Hero inks inside tha package - 232 and 233.
Hero 232 is well behaved blue black ink that has reasonable drying time and some other cool features. First - it's, it seems, iron-gall ink. It's fully water resistant. Like all iron gall inks it will look different with different pens and papers. As I have just a small sample I won't be able to tell you if it's fully safe for steel nibs. It just won't last that long.
The ink behaves well even on absorbent papers. It's probable it'll cause some bleedthrough on most absorbent and thin ones but my overall impression is definitely positive. The ink is cheap, well behaved and the color seems universal although tad on a boring bb side.
Drops of ink on kitchen towel
Maruman, Kaweco Classic Sport, broad nib
Leuchtturm1917, Kaweco Classic Sport, broad nib
Oxford optic, Kaweco Classic Sport, broad nib