# Hydrogen Peroxide & Vinegar Film reversal, can someone help me understand this reaction?

I'm interested in DIY photo development and I came across a reversal process that uses chemicals easily available at the grocery store. The purpose of a reversal process is to take a partially developed negative, which is a suspension of silver and silver bromide in gelatin, and turn it into a positive by removing the silver and leaving the silver bromide behind.

The two in question are 3% hydrogen peroxide and 5% acetic acid. I have tried this and it works but I don't understand why.

The process is as follows:

1. 30ml of 5% acetic acid solution is added to 500ml of 3% hydrogen peroxide, the rest is just water.
2. The mixture is then heated to 60°C.
3. In complete darkness the partially developed film is placed in the liquid for 6-10 minutes.
4. After this the silver is gone, but a yellow tint is left behind.
5. After this the silver bromide is then exposed and redeveloped leaving a positive image.

I believe the tint is silver oxide but I am unsure as I don't know enough about what is actually taking place in this reaction. I'm left with all sorts of questions:

1. What reaction is taking place to remove the silver?
2. What other reactions might be happening?
3. What is the fate of the removed silver after this reaction?
4. Why does it need to be hot?
5. Why is there a yellow tint left behind? Is it silver oxide or acetate, and how might it be removed/avoided?

The slow reaction dissolving silver must be : $$\ce{2Ag + H2O2 + 2CH3COOH -> 2CH3COOAg + 2 H2O}$$ The mixture has to be hot because the rection is extremely slow. Its rate is negligible at room temperature. Even at $$60$$°C, about $$10$$ minutes are required to dissolve nanoparticles of silver on the milligram scale. Silver acetate $$\ce{CH3COOAg}$$ is moderately soluble in water ($$\pu{10 g/L}$$).