sometimes old prints that are not properly fixed will do this -- the silver sort of crystalizes, I think, or comes out metalic. Not sure the exact process at work, but that's what it is.
Kentmere was the one I was thinking of. Can't recall the name, but it was described as a 'metallic finish'. I saw it advertised not that long ago. It would have been a UK supplier.
Alex.
Hi Robin, I posted a couple of examples of both gold and silver metallic prints in another thread, found here: (there was a url link here which no longer exists)
Unfortunately, it scans REALLY badly, so any real sense of metallic shininess is lost in the process, I'm afraid. The paper was made by Argenta and is long discontinued. Note also, since my stock was very old, it's also rather fogged. I'm sure it looked far better back in the day.
I think you all mix up papers. I think the question is not about a base with bronce layer beneath the emulsion.
But about a paper where the black silver image had been turned into a reflective image.
There was a special processing bath on the market (actually still is) to achieve this. It is called Halo-Chrome.
Kentmere used to produce a range of papers with different coloured base papers which included a silver and gold base. These papers were called Kentint and gave images where the shadows and mid-tones were black and the highlights of the paper's colour. They were used a lot in the 1980s by both commercial display companies and many in the camera club scene. Kentint is no longer made but appears quite regularly on eBay.
There is also Rockland Colloid's Halo-Chrome kit which is still available. This is quite different as this is a toner used with a bleach process. In this case the shadows and mid-tones are changed to a silver colour and the highlights remain the white of the paper base.