Why did my grey fondant turn green???

No idea, following! :-)

I had this with wilton black !! (and an older bottle of sugarflair !!) i made my lego superhero cake (black) . and a few days later the leftovers turned deep bottle green ! (cake was black at the time !)

Maybe it’s the mix of tones?? The fondant I mixed up as black stayed black, but the fondant I only added a little to get grey shades went almost eucalyptus!!!!
Not a happy bunny and although the customer didn’t seem overly worried I wasn’t happy handing over something I’d spent a lot of time on that wasn’t how I wanted it to be xx

Black when used with white usually gives a green purple shade instead of grey. for grey shade I use light blue with black.

I have had this with the black extra, in fact I was only talking about this yesterday with someone. I think I’m right in saying that all black has a green or blue base colour, black extra clearly has the green base. My friend (Liz, Time for Tiffin) recommended asda’s own black paste. I’ve now starting to buy black in, I mix all my other colours, from sugar paste direct (I don’t know if you’re UK based Karen?…)

This has also happened to me with Wilton black, when used with white fondant. There are green & purple undertones in the food colouring. Now if I want black, I make a small batch of chocolate MMF. Makes making blck a whole lot easier….tastes better too.

I know that this doesn’t explain this problem but generally if you mix a little brown into the black/white mix it will take out the purple undertone that sometimes occurs.

Wow! I knew you’d all rally and get the answer for me xx
I think from now on I’ll buy black ready mixed (although I don’t like the smell or taste of Renshaw’s, so will find another brand). I’m based in UK, so there’s bound to be another make. For White paste I use Sainsbury’s which tastes lovely and rolls out well. Thanks everyone xxx

I, too, always buy black already coloured. All black is purple or green based, and you need to know that for things like airbrush colours as overspray or built up spray will be different if colours are blending depending on the base of your colours.

Karen, I had several black cakes to make, and previously, when I had to make black fondant out of white then adding black, never had the exact color I wanted and by the time I did, the fondant itself became very soft. I often turn to my savior :-) Jo from Ciccio Cakes who recommended I buy ready-made black for my black cakes and if you have a lot of leftover (cos here I can only buy in 5kg buckets) you can freeze them!!