Images Turning Green Over Time

Can anyone speak to why printed images on fondant turn a green color after a week? I am placing them on royal frosting with thinned corn syrup. Would placing the image on a thin layer of fondant be better? Is the corn syrup the problem? Or . . . is the changing of colors just something that happens over time?

Catherine Allen

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It looks like your black food coloring is changing color. Some colors and brands are less stable than others. That's why they market no-fade purples and reds, as these two colors are especially prone to fading and changing. Though I can't say that I've seen any non-fade blacks on the market, but I haven't looked. What brand of edible ink cartridge are you using?

I doubt it's the substrate or the corn syrup causing the trouble, as I've used edible papers on both royal icing and fondant, and always use corn syrup to apply them, with no trouble. But I am usually using stamped or pre-printed papers (that I did not print myself).

I am having these printed for me from a local bake shop so I do not know what brand of ink they are using. I thought it had something to do with the butter fat bleeding through the sugar sheet. I am going to reapply the image on top of a thin sheet of fondant and see if that helps. Are you aware of some sugar sheets that are better than others?

Busymom Baking posted:

I am having these printed for me from a local bake shop so I do not know what brand of ink they are using. I thought it had something to do with the butter fat bleeding through the sugar sheet. I am going to reapply the image on top of a thin sheet of fondant and see if that helps. Are you aware of some sugar sheets that are better than others?

I don't know - I don't print on sugar sheets often enough but some are very thin and sheer; others are not. I'd go with what @Econlady says on this. I'm not sure about your butter fat theory though, as it doesn't sound like you had the sheets directly up against the cookie and there's no butterfat in royal icing or fondant. I'd be hard-pressed to believe the fat is leaching all the way through the cookie and icing into the paper. More like the paper absorbing the coloring in a strange way, or the coloring fading.

I'd ask the supplier what brand of coloring and paper they use, just out of curiosity. And to compare to Econlady's Lucks suggestion.

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