Hero Blue Black 0028 Ink Cartridge. I have used Hero in both cart and bottle form. It's my favourite Blue Back ink because it doesn't disappoint. It's a wet saturated and deep space dark blue. The colour tone that puts Black ink to shame, because Blue Black is complex. It won't really shade all that much, and I admit there is not remarkable shine, sheen it's tone is matte when it comes to that sense. But there is a certain satisfaction when the eye registers what it thought prior was a monochrome ink. Sussing that out that obvious secret makes Blue Black a step past just another Black Noir choice. Chromatography confirms the ink is permanent. Even when wet it's stubborn to move. The exact original line remains. When this ink is dry, you can drown a page to the point where the paper falls apart and the ink will hold. The upward flow of the test shows some brown, black or grey and magenta dyes which imply there could be a sheen. I have yet to see it though.
Hero Blue Black is a big brand ink. They sell it in a variety of forms, in which I offer and review it as 0028 which is a Long International Standard Cartridge format. These carts are simple made to match the average size of the ink converter they are replacing when in use. This means you get a bit more ink in the cart over a short. Hero Blue Black fits modern definition of a Blue Black ink. That is the stability, saturation, and dark tone that comes with a Blue Black. It literally is a deep dark blue that without examination could pass for black. Vintage Blue Blacks used to be Iron Gall inks. These would write in blue, even a light blue, but as they dried and were exposed to air. They darken to a black colour. Blue Black described that transistion. Iron Gall inks are famously permanent as the ink oxidises into the paper. Hero 0028 is a modern dye based ink and so follows the simple descriptive definiton of Blue Black. It is however quite permanent in it's own right.
