Help with iron on transfer paper?

I'm trying to make custom teddy bear t-shirts for my brother's band, and I was thinking of trying iron on transfer paper. I have black and pink shirt, and the logo is bright green from the source. I'm a little insurance that the role of purchase – I realize that might have to buy both. The paper for dark fabrics is seen to be white, and I do not want a white background around the source. I just bought this, and then black print in the white areas? I hope that makes sense. I think that transfers for light colors are on a transparent background – hence, the image almost disappears when dark was doubted. The pink shirts are pretty light.

For black shirts, get the dark shirt iron-ons. Then get into the paint, photoshop, whatever, and make a black box. Then paste the logo on the top of the black box. After printing and steel. You can see the black box a little, but it is much better than trying to cut around the logo. For the pink shirt, depending on how bright are likely to be capable of using light-ons iron and color shirt do the same. Make a rosy picture as close to the color shirt as you can. Since monitors are not always what you get, you can try to some different places on plain paper first before losing iron in the paper to make sure that you have the best rose.

Spoonflower: Custom Fabric Shipment #1