I've got to pick myself up some green ferric ammonium citrate; it's cheap as I recall ... but the shipping cost will be annoying - time to find local chemistry suppliers.


Donald, when you try this out, definetely let us know; cyanotypes fast enough for in-camera or especially for the enlarger would be really nice; I wonder if you could coat this stuff onto a clear base or render the paper base transparent (with oil or such) and print from the cyanotype negatives from in camera ...