I am a professional calligrapher and this is my go-to when I need white gel ink.
It is very opaque and bright on the darkest paper. The only issues I have
found...if you write too quickly the ink will occasionally "skip". It is not as
free flowing as the signo gold and silver inks. And warning...this ink WILL
smear on certain surfaces. I recently did an order of very high quality black
envelopes with a tight,smooth finish and had to put tissue paper between each
one as when they were stacked they did smudge onto the adjacent envelopes. The
writing itself does not smear..but the residue did and I had to use and art
eraser to get off the smudge marks. Also happened on an order of navy envelopes.
Does not seem to happen on Kraft or lighter, less heavy weight paper where the
ink absorbs into the paper more instead of sitting on the surface...but do
beware it can and will leave white marks on some papers if they touch. Would
also love to see signo design this line so that you can see when the ink is
getting low in the barrel....a bit of a pain as you usually cannot use this pen
until it is completely empty and it starts to "fade" in brightness about with
about 1/4" ink or more left but you cannot see the ink level.