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Color of Tin Solution

What color should an alkaline sodium stannate (tin) solution be?

I've heard it should be "straw" colored. Ours was dark grey, and now it is light grey after adding 1 quart of 30% hydrogen peroxide per 50 gallons. I want to add more to improve the deposit appearance.

Is too much hydrogen peroxide bad, or does it just turn into water and oxides?

Does acetic acid [on eBay or Amazon] treatment (to reduce sodium hydroxide) have to be glacial, or is white vinegar [in bulk on eBay or Amazon] acceptable?

Thanks,

Larry Smith
Plating Engineer - Tucson, Arizona, USA
2007

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