Mixing black and white soft glass?

[Kitty]

I sold my Corina book and it had suggestions for how to mix white and black so they don't bleed into each other. For the life of me, I cannot remember the combinations. Is it better to use one brand over the other?

Right now I have white effetre and black, intense black effetre. Is there a difference with the lauscha black and white?

[Renee]

Hi Kitty! If you're talking about decorations, put the white on the black. If you put black on top of white, it'll bleed purple. She further adds that black has a tendency to bleed into any opaque color placed on top of it, in which case, work it cooler, or encase it with a thin layer of clear. As an alternative, she states that dark transparent amethyst or gray can be substituted for black. Those colors appear black unless held up to a bright light source. By the way, the intense black will "web" easily. I have both moretti and lauscha black. I've never had a problem with the lauscha. It's stiffer and takes more abuse. Beyond that, I can't say if there's a difference.

[Kitty]

What about mixing "black" with dark ivory? Maybe it's better to use Vetrofond ivory?

Thanks