How to increase tone in a black and white Becquerel daguerreotype?

[Bakody]

I just keep watching the image: 2layres of orange: more grays, but nearly no white… Or maybe just because orange can let go thru more light and just cause grays?

Hmm, new ideals, new questions.

http://daginhun.blogspot.com/
 http://www.facebook.com/DagerrotipiaDaguerreotype

[CasedImage]

What is the white band in the image on the left hand side? It reminds me of a accidental case of hyper-sensitizing I did to a becquerel plate – the white band at the top of the image was from a darkslide with a loose slide cover that I accidentally moved up and gave the plate a blast of sunlight – I can’t remember if it was pre or post exposure. The resulting plate had the whitest whites of all my becq. plates. It may not relate to your plate but there are many things that could explain the proper tone – correct sensitization exposure, image exposure, polish and development not least among them

 

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[Bakody]

That band is because of the UV yellow (8layers) development. It’s looks like an overexposed area in a normally developed dag.

http://daginhun.blogspot.com/
 http://www.facebook.com/DagerrotipiaDaguerreotype

[Alexey Serebryakov]

Hello. So far I get a blue image. I use 6 or 8 layers of auto film – I light up for 3 hours. I use a 27000lm – 300W LED lamp. Maybe i need to try with a 1000W halogen lamp?

[botticelli1972]

Best results I ever got were with Rubylith (the original masking film for orthochromatic processes which is still available from the manufacturer) placed over an exposed plate and set to rest in a north facing window all day. I feel the slow growing of the image particles helps but I have no science to back it, just observational experience. This is a low/no heat procedure, which I also feel is important.

[Alexey Serebryakov]

Yes, I know that Rubylith is a proven film. In my country, this masking film is difficult to buy. I ordered to friends from Germany – I am waiting for a parcel. The problem may still be in my silver electrolyte. I assembled it using thiourea, not using cyanides. visually, the coating looks great, but sulfur can interfere

[Alexey Serebryakov]

Are you going to use the film Rubylith in one layer or two?

[botticelli1972]

I only ever used one sheet, taped to a piece of clear glass for support. I did a test once with two, it just took twice as long to develop and the image was no better if I remember correctly.

[Alexey Serebryakov]

Thank you.
Now I have a real Rubylith. I have assembled a new silver plating electrolyte, but I still get plates with a bluish tinge. Did you achieve a black-and-white image like Bakody in the test? Or were they bluish too?

[botticelli1972]

Slow reply, but I have had both blueish and black and white images resulting from the technique. If you look at my images under Larry Shutts you will see the results. It seems to be about 50% split even though I believe I do the same thing each time.

[Alexey Serebryakov]

I started getting beautiful black and white images. Cyanide electrolyte, one layer of rubilite, illumination with a 500 watt halogen lamp – 2 hours 40 minutes.

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[botticelli1972]

That looks great! The Rubylith is the real secret to getting it right. You might try a few slow developing tests if you have the time. I tried with bulbs of all sorts but settled on natural sunlight, just not direct, using north light only.

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