Daguerrean plates: comparison between a French and a new Spanish supplier(no more fogged plates!).
French plates give a very sharp image with a strong contrast in a magenta first cycle. Better used them with a second cycle to reduce the contrast.
The development times are very long to reach neutral whites ; 6 hours with rubylith + sun – EV15.5 for a second cycle.
Vaporization of French plates in a first cycle does not give very metallic colors as in the second cycle. For against Spanish plates in the 2 cycles give very metallic colors.
Spanish plates give sharp images with a softer contrast in a first cycle ( magenta).
The development times are short :
1h00/1h30 with amberlith Alternative ( Rosco Filter n * 15, 2 layers ) + 2700 kelvin lamp – EV14
Rubylith + 3h00 with sun – EV15.5
The shots were done with natural light ( 4500 kelvin ) and in studio continuous daylight ( 4700 Kelvin) .
The development with :
rubylith + sun – EV15.5
rubylith + 2700 kelvin lamp – EV14
Alternative amberlith ( Rosco Filter n * 15, 2 coats ) + 2700 kelvin lamp – EV14
conclusions:
The plates of the 2 providers give excellent results, beautyful Becquerels!!!
…
We also wonder why such a difference in development times … expect some chemist or enlightened person inform us …
The full test is there in spanish:
Daguerreotype is beautyful… Becquerel is so Beautyfulllll!
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