You can use a styptic pencil or powder, available at the drug store. Tissue will work if it's not a bad bleed, but when you remove the tissue usually the clot will come with it and you are back to square one.
Only trim the very tips of the nails; one bad experience like this can make a cat impossible to trim in the future! Hitting the quick is intensely painful!!
OK, I'm confused. What is "to "quick" kitten claws"? Remember I'm Swedish, so talk slowly.
OK, so the very tip would be maybe be about 0.5 mm (or about 0.0196 inches - had to find a converter).
I don't think our breeder has clipped the kittens claws yet, have to ask her tomorrow when we go up to see the kittens the last time before we come and pick them up in 2 weeks (they are 10 weeks old now).