Fontlab doesn't magically make your font bolder or lighter.
You have an effect that does that, but it's gonna be far from good. You will have to draw after that, correct it.

For MultipleMaster to work, you need 2 weights with similar outlines in terms of amounts of points and starting points.

But if it's from an illustrator moonoline, the easiest is to make it bolder in illustrator, then reimport it in fontlab.
After that you could try to mix both weights in a Multiplemaster to interpolate or extrapolate it.

http://typophile.com/node/81774

Short version: use Fontographer4 on the side just for boldening.

hhp

There is a handy function in FL under the [Path] menu, “expand path” or the like:

you can apply it to more than one glyphs selected in the font window.

In any case, after running that alteration, revise the result carefully and do manual adjustments where neccessary.

Thanks All!

Really Andreas? Do you use that?

I work with the KLTF Transformer python macro: Lock left edges — move right edges. I guess you can figure out the vertical bit yourself. The upside of this method is that you take as much white as you add black.

Looks like a lot of chocolate dipping to me.

I use it only occasionally. And not for generating whole glyph sets. That wouldn’t work.