I am making a grooms cake for this Saturday that is to look like a stack of LP records. It will have to be iced in all black icing and then scored around the edges to look like the edges of all the records.
Question: Is this black icing going to stain everyone's teeth and lips? 
It will be chocolate BC tinted black.
Thanks
You could always airbrush it black if you have an airbrush machine. I really don't know if it will, but I've used large quantities before and no one said anything about stains. Dunno though...hopefully someone else can help. Are you using any fondant perhaps?
I am using fondant only as part of the design such as the record labels. I am painting the label wording and designs with food color on the fondant.
I also have to make a 14" square cake to look like a record player!
It will be dark chocolate icing to look like wood and then the turntable will be painted with silver luster dust.
I used black (decorator icing with black icing color)last weekend as an accent on a white wedding cake. I started the cake Thursday night and did the design and when I looked at it first thing Friday morning, there was a pink streak running all the way from the each design to the bottom border. I was absolutely SICK. 
So when I took all of the design off and put it back on I used dark chocolate bc and had to add only a small amount of black. I don't think that it would stain your mouth because it I didn't have to add a large amount of black.
the air brushing will turn them black as well. when I decorated cakes at a grocery store I made my friends b-day cake he loved the Undertaker (wrestling) and I made a sheet cake with a grave screen on it and I airbrushed the back ground in black and purple to make it look all spooky and what not our mouths were covered in it..it was pretty funny.
Question: Is this black icing going to stain everyone's teeth and lips?
LOL! I just had thoughts of all the people all dressed up for a wedding, and smiling with gray teeth and black lips!
I don't know the answer. I never make black. I always use Duncan Hines Dark Chocolate fudge frosting for anything black. But; in your case, I don't think it would work to hold the grooves in the records.
If you're starting with chocolate, you shouldn't need to add very much black, especially if you use Americolor Super Black. Be sure to let the icing sit for at least 24 hours to allow the color to deepen.
In my experience, I've found that icing (or chocolate or gumpaste, etc.) doesn't have to be absolutely, unmistakably, void-of-color black to be effective. A very, very dark brown will be just as good. It's a stack of records, so people will see black. And if the wedding is in a banquet hall, it will probably be fairly dark in there anyway.
Truly black icing, whether mixed at home or prechased precolored dfinitely will stain lips, teeth, even table linen. You really need to cover the cake in fondant and then add the grooves for the sides (records.) The fondant doesn't stain in my experience. If you're adding black to a wedding cake, it is best to add those accents in black fondant.
I'm doing a cake in a couple of weeks and I've done this for a trial run. The colors are green, silver, and black. The cake is white BC and I've made black meringue drop flowers. The centers I put silver dragees in them. The flowers are edible, but not really going to taste good, so just pick them off! The flowers are going to be attached at the hall, and the green for the leaves will be added then too.
If you're starting with chocolate, you shouldn't need to add very much black, especially if you use Super Black. Be sure to let the icing sit for at least 24 hours to allow the color to deepen.
In my experience, I've found that icing (or chocolate or gumpaste, etc.) doesn't have to be absolutely, unmistakably, void-of-color black to be effective. A very, very dark brown will be just as good. It's a stack of records, so people will see black. And if the wedding is in a banquet hall, it will probably be fairly dark in there anyway.
Good point--the mind sees what the eyes don't-they will think records and see black even if it isn't totally black. 
I'm not experienced enough with fondant to try covering a cake this important, so I will use the black "sparingly" in dark BC and go from there.
Thanks for all the suggestions.
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