[redbowrestore]

I have used a solution of chromic acid, sulphuric acid and nitric acid, to recolor antique carburetors after bead blasting for many years.  With the increased difficulty of getting small amounts of the chromic acid (10 lbs).  I am looking for a substitute for my dyechromate solution?  It needs to be something that works rather quickly, the dyechromate dyes in 10/15 seconds.  I would like for it to leave a yellow/green iridecent finish.  Like the orignal carburetor color.  Being chemically challenged and not understanding anodizing ( which gives a fake bright aluminum like color) I would appreciate any help you can give. Thanks

[UnintentionalChaos]

Chromates and Dichromate compounds, when mixed with strong acids (such as sulfuric) form chromic acid in solution. These are much easier to obtain than chromic acid.

If you needed one pound (453.6g, 4.536 moles) of Chromic acid (CrO3), substitute 675.9g of Sodium Dichromate Dihydrate or 667.2g of Potassium Dichromate with 224.1g of Concentrated Sulfuric acid.

This is almost exactly 1 1/2 pounds of either dichromate and 1/2 pound of sulfuric acid. If you have additional sulfuric or nitric acid in the mix, perfection when measuring is probably not necessary, but helpful.

[redbowrestore]

Thanks, I'll try to find the chemicals and give it a try.