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Subject: Re: [DCHAS-L] Photographic chemical baths
Date: Monday, April 29, 2019 at 9:52:22 AM
Author: "Stuart, Ralph" <Ralph.Stuart**At_Symbol_Here**KEENE.EDU> 		Next by Date:
Subject: Re: [DCHAS-L] MilliporeSigma Introduces New Greener Solvent, Cyreneª
Date: Mon, 29 Apr 2019 20:27:32 +0000
Author: James Saccardo

(Note: This post is 6 years old and may contain outdated information.)

From: Monona Rossol <0000030664c37427-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
Subject: Re: [DCHAS-L] Photographic chemical baths
Date: Mon, 29 Apr 2019 16:10:44 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 1565643496.2006809.1556554244222**At_Symbol_Here**mail.yahoo.com
In-Reply-To


It's actually much more complicated and convoluted than that.  I answered your question off line and then I just couldn't hit the send button.  It's in the draft file and I'll think on it.  


However, I can say this is not about assessing a particular commercially available filter.  There is a major filter manufacturer who will be designing one specifically for this photo department. 

But to do this right, I need to know what is emitted as air contaminants by a number of different Black and White processes, toning, and alternative photo processes.  I'm working one set of chemicals at a time and doing my best, but if anyone has any data to help, I'd be thrilled.

Monona

-----Original Message-----
From: Stuart, Ralph <Ralph.Stuart**At_Symbol_Here**KEENE.EDU>
To: DCHAS-L <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Sent: Mon, Apr 29, 2019 9:53 am
Subject: Re: [DCHAS-L] Photographic chemical baths

> > Only incidentally are some chemicals that emanate from the baths during use mentioned such as sulfur dioxide, acetic acid, ammonia, formaldehyde, and H2S from some of the toners.  But not all of these are generated by all processes and there are many other chemicals that we never even thought about such as the halides, amines, phenolics, etc.. 

Am I correct in assuming that the local environmental authorities don't have adequate guidance in assessing what chemicals might be of interest in assessing this air filter? It's a fascinating question that you raise...

- Ralph

Ralph Stuart, CIH, CCHO
Environmental Safety Manager
Keene State College
603 358-2859

ralph.stuart**At_Symbol_Here**keene.edu


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