MTS

I used Saral transfer papers when I was working an applique project with black fabric.

http://www.saralpaper.com/main.html

Bluphrog

Clover has a white marking pen that works really well. When you first draw the line, it looks like nothing is there, but let it sit for a minute or two, and the marking appears. It is water soluble.

I use it on all my dark fabrics when appliqueing.

Covered in Threads

I love using a product called Easy Mark. It's a chiseled edge wedge of heat sensitive soap. When you want it to disappear, simply hit is with a hot iron and it's gone.

LAB55

I have used soap slivers, they work great on dark fabric, also soapstone works :-)

Just Me...

I like the Chaco Liners. Yellow or white would work well.

clem55

I have used soap slivers, white chalk and the silver pencil

Scrap Happy

I just remembered that you can use contact paper. Cut it out to the design you want to use and stick it on, it comes off easy and you can use it over and over again. I've tried this and it works great.

Kas

This is an awesome pen. But you do need to let it dry a bit to see where you stopped marking. I wasted a lot of ink trying to figure that one out! LOL!

gollytwo

I have and it works. It needs to be a very thin edge.
Alot easier to buy the silver marker

jtquilts

I use a tool that has a thin chiseled edge to mark my fabric. It is great to see on black. I am sorry I don't remember what it is called. I also have an old letter opener that works the same way.