been there done that . many times, sometimes even getting rid of the saturated pad with a piece from a closet. those tiny specks can be murder.Seriously not all ink is created equal, just cause you got lucky on a sofa and thought you were a hero.
I had a small drop in carpet explode ended up patching it.
You can see the size of the ink spot in the pad.
View attachment 115320 View attachment 115321
been told , that a broken pen lay in the same spot for a long time. draining the ink through the back , into the pad, lurking there waiting for an unsuspecting carpet cleaner trying to be a hero!