Basic Question About Frosting Coloring
Decorating By luvlaugh Updated 25 Apr 2010 , 3:52pm by denetteb
This page from Wilton may help you.
http://www.wilton.com/decorating/icing/coloring-icing.cfm
Also, do some experimenting on your own to see what works for you. 
I played around with this method and tipped some roses. I painted the color on the crease of my plastic disposable bags. I did not use my feather weight ones, because I didn't want to dye my bag. Do not use a lot. Sorry about the graininess of the pic.
I tried the striping the last cuppies I made, but no pics. I put a really solid line of color in pink and purple with a small paintbrush in 4 equally spaced stripes. Maybe 1/4 inch wide for 18 total cuppies. What happened for me is that the first maybe third were way too dark. The pink was actually red and the purple was more blackish navy looking. (I know, I got red when I didn't try and can't get red if I try!) Then the color quickly faded and the last third had hardly any color. Very uneven technique. I preferred ones I made using different colors of bc in the same bag. If you do the striping don't over apply the color and plan on starting a new bag when the color fades. But it was fun to try, give it a shot and play with it.
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