Green / white florist wire is what I use... anything from 20 - 30 guage; depending on what is sticking out at the other end... as far as I know it's not toxic... if it was in a cake for months, perhaps it would do something, don't know -- someone else might be wiser on this than me though.
-- Fi
I can't say with any certainty what is safe or not- and I guess part of it depends on how paranoid you are 
! I do know that to be safe, a lot of people will either wrap their wires in plastic wrap or insert straws into the cake then put the wires in the straws. Coffee stir straws are perfect for this 
and that is what I will be using when I do my friend's wedding cake next Saturday (wish me luck)
Amber
In South Africa, and the UK it is considered a health risk to put wires straight into a cake. I stick a flowerpick into the cake - a little plastic tube bought @ the florist shops- and then put the wires into that.
In South Africa, and the UK it is considered a health risk to put wires straight into a cake. I stick a flowerpick into the cake - a little plastic tube bought @ the florist shops- and then put the wires into that.
In Australia it is also the same. In competition it is strictly forbidden. There are stories of cakes being cut by an unsuspecting person without the wires being previously removed removed and bits of wires being served to guests. Sounds like a bit of an urban legend to me 
, as if someone is going to cut right through a wire and not realise they've done it. Even so, if you do it, it's also best to do it just when the cake is going to go on display and not leave them in for extended periods of time, as the moisture in your cake may make the wire rust, and then the health hazards start. This would only happen if the wire was in there for more than a day. It's never happened to me (yet), but i dont use wires in cakes very often.
cheers
Nati
Glad to hear that worked for you- and it does sound fun! Maybe next time if you want the wires to be stationary you could try using a little piece of fondant or gumpaste instead of royal 
Amber
Thanks! I wish it could have been neater, but I need more practice!
I really should have let the bow dry more...overnight maybe. It dried for 5 or 6 hrs. It was just mmf, and I think that it was too soft...next time I'll make my mmf properly (stiffer) or add some gumtex or something.
My gumpaste flower wires are wrapped with floral tape and just laid on the cake surface. But if I need to hang them on the side or edge I use paper or cloth covered florist wire, or regular wire from the hardware store if I need real strength. I wrap mine in plastic wrap but have also heard of dipping the wire into melted white chocolate, for the section that would be inserted into the cake and allowing the chocolate to set up before inserting.
I use regular floral wire but I put a straw or a hollow plastic dowel in the cake and put the wires into that. It works very well. When you pull out the straw or dowel, the cake comes out with it, so the wires never touch any cake that will be eaten.
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