Maintenance Dyeing A Doll Green?

Rit has colour formulas on their webpage that you might want to look at: Color Formulas — Rit Dye
You'll want to use Rit Dyemore (for synthetics).

Given that the base is yellow already, you'll probably need to alter the formula a little bit, or do a test dye on the headcap or something. If you are bothered by the unevenness of the yellowing you might need to sand it until it is more even, as it'll show up under the dye, or do yellow dip on the lighter parts first.

 

The color formulas on Rit's website are really handy! You can search by color grouping, and I've found the swatches they show to be fairly accurate from screen to actual dyed piece on white resin. The formulas are based on a base of about 3 gallons of water, plus however many table/ teaspoons of each dye color listed. The formulas will fit in a large stockpot, which is good for SD sized dolls in my experience. You'll want to make sure to use a non-reactive pot that you can keep at around boiling. Stainless steel is easiest to find, and since it's for dyeing things, you don't really need one that's too fancy or complicated.

Depending on the shade of green you're going for and how dark the yellowing is, you may not need to do anything more than a good cleaning and wipe down with dish soap and a magic eraser before dying. If you want to dye a pastel shade then you might want to sand it back to a more even tone, but sanding can also cause dye to not take as evenly sometimes, since the dye can settle into any sanding marks. You could try the oxiclean bath that's been suggested some places to see if it lightens the yellowing at all before dying. That might help even it out a little bit more so that any differences are easier to cover with dye.

Since she's already yellowed, you might want to add a bit more blue to the formula to balance it out, but I'd suggest testing out the times and the formulas on pieces that won't be as visible before dying major ones like the head.

 

I would strongly recommend not sanding. If you sand at all, you’ll have to sand the whole doll evenly, so that the dye takes the same across all the pieces, and even then, you’ll probably have harder to sand areas take less dye, making it uneven. I would just clean the doll with water and dish soap to get any oils from handling off the body as well and make sure it dyes fairly evenly.

i do agree that adding more blue to the recipe to work with more yellow in the base will probably be helpful!