Re: Van Dyke Help Sought

Judy Seigel (jseigel@panix.com)
Fri, 13 Sep 1996 21:56:40 -0400 (EDT)

On Sat, 14 Sep 1996, George L Smyth wrote: > > Silver nitrate 37.5 g >
Ferric ammonium citrate 90 g > Tartaric acid 15 g > Water to make 1 liter

Let me suggest that you move the decimal point one place to the left.
That's simply too much emulsion unless you're making bedspreads. I mix up
100 to 200 cc at a time and it's enough for many many prints..

Also, I think it was Bob Schramm gave a VDB formula with oxalic acid(?)
I tried that and found it definitely inferior to the classic one with the
tartaric.... It *usually* washed off the paper.

Judy