Bromine

[Giovana]

Hello,

I’ ve been doing bdags for a couple years but only using iodine.
I would like to begin to sensitize with bromine in order to do faster plates for a dag of the moon.
I boght a blister of pure Brome but I don’t know how to dilute it..

I heard that there are some people doing this with silica gel.
Could anyone give me the recipe?

Thanks in advance!
Giovana

[photolytic]

Don’t used Bromine on Becquerel plates!

That being said, please see the following post by Mike Robinson from May 11, 2013 at 7:03 am #15953

Mike Robinson

Participant

Bromine in water according to the old manuals is 1 drop in 40 of water.

lime (calcium hydroxide) should be a medium pink through and through. see picture “bromine in lime”

I find silica gel 6/16 mesh the best medium for controlling bromine. I call it Robinson’s Quick.

I discovered this in 2003 and have been using it ever since. Bromine in silica gel should be yellow.
see picture stock/vs/working. When bromine works too slow, add a small amount of stock.

the picture shows how the silica gel is charged.

Mike Robinson

Attachments:

stockvsworking
stockvsworking.jpg

bromine-in-lime
bromine-in-lime.jpg

charging
charging.jpg

[phuphuphnik]

I have been able to do lunar dags with Bequerel. I used an 8″ SC celesteron. it was a 7 minute exposure

[jgmotamedi]

Just wanted to add to Photolytic’s post:

The ratio of 1:40 is most likely for a saturated solution of bromine-water (see this link) further diluted in water. In other words, you have to first create a saturated solution of bromine-water and then dilute this 1:40 with water. Diluting pure bromine 1:40 with water would be very strong.

[Author]

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