User login

Light-safe Emulsion?

Posted on Mon, 24 Oct 2005 at 5:08



Hello,
Is there any emulsion that is light safe; that can be take out from darkroom,to inside another room: (just like the photo emultion-coated plate in offset printing):

1. A. After coating wet condition
2. AFTER DRYING in a dryer
3. Just before exposing
4. After exposing just before washing

Or is it is a must to keep it strictly in dark-room condition ?

Thanks,

Thomas
email: signergyprints@yahoo.co.in

Location of Opportunity or Item

Comments

Anonymous says: Emulsion hardens because it is very unstable and UV light causes it to cross link... it is photosensitive. Get yellow safe lighting for your shop, and if you must move screens a distance I would suggest ...

Emulsion hardens because it is very unstable and UV light causes it to cross link... it is photosensitive.

Get yellow safe lighting for your shop, and if you must move screens a distance I would suggest covering your screens with heavy trash bags to prevent light from hitting it.

posted on: Tue, 11/22/2005 - 1:12pm
Anonymous says: Regular diazo or dual cure is not that sensitive to flourescent or incadescent light bulbs. don't have it in the path of direct sunlight or near the exposure lamp, but otherwise if you are quick the exposure ...

Regular diazo or dual cure is not that sensitive to flourescent or incadescent light bulbs. don't have it in the path of direct sunlight or near the exposure lamp, but otherwise if you are quick the exposure is minimal.

Don't believe me? take an integrator into any of your spaces and check how slow it registers the UV light that makes it react. Flourescents and regular light bulbs have very little UV in the correct range, and you are so far away from them it would take hours and hours to start to expose the emulsion.
I use Murikami 9500 and 9800, and Autotype 8000, all dual cure emulsions - I am sure the others are similar.

NOTE this does not apply to high speed SBQ /pure 'one pot' emulsions, they are much more sensitive.

posted on: Sat, 12/31/2005 - 4:01pm

Did you enjoy this article? Click here to subscribe to the magazine.