Comments about Delta 1 Datamarker V Permanent Waterproof Pen - Black:
I only give this pen two stars because it's at least waterproof and safe. However, compared to the Kaiser pens, this is a fat, blunt tip. More importantly, the Kaiser pen writes black, while this one writes a barely visible light gray in comparison. I can use the Kaiser pen for emulsions, sleeves, back of prints, etc. This datamarker barely writes on absorbent paper.
Bottom Line No, I would not recommend this to a friend