Electrumtype Kary: contact of Kary herself. Printed on hot press Arches Aquarelle. 1 gold, 5 drops ammonium ferric ferrous oxalate, developed in silver nitrate. bath nitric acid to change base color from brown to black.
Battle of the Alamo (February 23 - March 6, 1836) Modern-day San Antonio, Texas, United States.
A chrysotype portrait printed in my hotel room the night before the presentation in Santa Fe. Just 3 drops of C added to the ammonium ferric oxalate! Had to clear it in sodium sulfite first. Original is much smoother than my scanner can render.
Fountain, National Gallery of Art. Washington, DC. Electrumtype Kary process, which I invented over the weekend of May 2 through 6. It is 1 drop of gold and 5 of amm ferric ferrous oxalate. I "developed" out the weak gold image in 4% silver nitrate. Clearing required removing the iron and fixing the silver in hypo. The final print is electrum: a mixture of gold and silver. It's a very beautiful yet very inexpensive process; I guess about $1.00.
Mission Concepcion, San Antonio, Texas. Pure gold. The formula is: Prepare ammonium ferric ferrous oxalate by adding 3 to 10 drops 1% ascorbic acid (vitamin C) solution to 10 ml 40% ammonium ferric oxalate. Mix 10% gold chloride with the ammonium ferric ferrous oxalate at a ratio of 3 drops AFFO for every 4 drops of gold. Brush onto dry Arches Platine paper. Dry in dark for 15 minutes. Place negative on paper and expose to UV or sunlight. First clearing bath is ice cold 2% sodium sulfite.