Deleter Matte Black Ink, Versatile Marker & Water Proof, 30ml/Bottle, 1 Bottle (341-0005), 1-Pack

My review is a very niche use: I use this – Deleter Black 4 – in an ackerman pen, which is a specially-designed fountain pen made to use dip nibs and handle drawing and dip inks. It must be said that you should NOT under any circumstance use this in a normal fountain pen! This is for dip pens, brushes, and other devices specifically designed for dip inks!That said, it’s a a VERY thick ink, so you MUST dilute it for use in an ackerman if you don’t want to get one of the larger feeds. And it requires watching, as it dries on the nib rather quick. I use about 1 part water to two parts ink for the Tachikawa Manga G, other nibs may vary. Keeping water and paper towels nearby for cleaning your pen is also essential, but thankfully it does easily clean if a clog occurs. For other uses I imagine you’d dillute it to the consistency required by your project and chosen pen nib.For the paper I use – neenah exact index 110lb – once dry it resists most copics pretty well as long as you are not scrubbing at it, although a few cause a slight haze. This might be more of an issue on slicker papers where more of the ink sits on top of the surface, or if you do heavy blending for marker-painting. But for drawings where you will be just cel shading and drawing with copics, it works well.For drying, it’s relatively quick when applied thinly (like you would with a pen), but in large amounts it can take quite a while, and goes matte before it’s fully touch-safe. You cannot visibly tell if the ink is wet or not, you have to simply wait longer than you think. Additionally, it has a tendency to seep through paper really easily if you spill drops of it, so heavier applications of it with a brush might require special consideration.