Plates fogging

[jgmotamedi]

Hi Stephan,

I have never heard of too much UV from the sun getting through rubylith as a problem, but that doesn’t mean you are incorrect. I have heard of too much heat causing fogging, but not as quickly as your describe. You are using real rubylith, right? Not a red gel? Anyhow, I have three suggestions for you, in the order I would try them.

1. Develop using a halogen light. It takes 2-3 hours to develop under a 500 watt (110 volt) halogen light.
2. Use two layers of rubylith
3. Develop under red LED bulbs (no rubylith necessary). It took about 8 hours, but I developed a daguerreotype under nine red “party bulbs” that I purchased at a hardware store. I don’t recall the wattage, but they were pretty bright. Note that these were not white LEDs under a red dome, but real red LEDs

Good luck,

jason

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Thank you so much Jason. Today I felt like Monsieur Daguerre himself!!!! I am totally excited.

The difference was as you said: the double layer of Rubylith. I had it in the hot sun for 1 hour and 40 minutes before fixing it and this it what came out (picture attached)

Thanks for your help. This was spot on advice.

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