[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Rollei] Hypo

- --_=_=_=IMA.BOUNDARY.HTML_5149952=_=_=_
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit

    Hi,

     As a former professional, I can attest the Fresh Hypo (not the type that 
sits
  in the newsroom darkroom for a week without being changed) will do the job 
with
 no surprises 10 down the line. But, since many of you appear to be hobbyists
 you might also want to check out the potential hazards and be sure your
 home darkroom is ventilated properly.   

   Hypo i.e. Hydroquinone.
   This is the link to the NIOSH Pocket Guide to Chemical Hazards
<A HREF="http://www.skcgulfcoast.com/nioshdbs/npg/npgd0338.htm";>http://www.skcgulfcoast.com/nioshdbs/npg/npgd0338.htm</A>

    It also makes nice yellow stains on your clothes, so dress appropriately,

                                                                           
Sincerely,
                                                                  Pamela Jean 


Pamela Jean,

The warnings may be appropriate, but your chemistry is off. Hypo is sodium thiosulfate or to use the old terminology sodium HYPOsulfate, which is the 
primary component of fixer. It is not hydroquinone.

Neal F




- --_=_=_=IMA.BOUNDARY.HTML_5149952=_=_=_
Content-Type: text/html; charset="us-ascii"
Content-Transfer-Encoding: 7bit

<HTML>

<FONT FACE="MS Shell Dlg" DEFAULT="FACE"><FONT SIZE="1" POINTSIZE="8" DEFAULT="SIZE">    Hi,<BR>
<BR>
   <I>  As a former professional, I can attest the Fresh Hypo (not the type that <BR>
sits<BR>
  in the newsroom darkroom for a week without being changed) will do the job <BR>
with<BR>
 no surprises 10 down the line. But, since many of you appear to be hobbyists<BR>
 you might also want to check out the potential hazards and be sure your<BR>
 home darkroom is ventilated properly.   <BR>
<BR>
   Hypo i.e. Hydroquinone.<BR>
   This is the link to the NIOSH Pocket Guide to Chemical Hazards<BR>
&lt;A HREF="http://www.skcgulfcoast.com/nioshdbs/npg/npgd0338.htm"&gt;http://www.skcgulfcoast.com/nioshdbs/npg/npgd0338.htm&lt;/A&gt;<BR>
<BR>
    It also makes nice yellow stains on your clothes, so dress appropriately,<BR>
<BR>
                                                                           <BR>
Sincerely,<BR>
                                                                  Pamela Jean <BR>
</I><BR>
<BR>
Pamela Jean,<BR>
<BR>
The warnings may be appropriate, but your chemistry is off. Hypo is sodium thiosulfate or to use the old terminology sodium HYPOsulfate, which is the primary component of fixer. It is not hydroquinone.<BR>
<BR>
Neal F<BR>
<BR>
<BR>

</HTML>


- --_=_=_=IMA.BOUNDARY.HTML_5149952=_=_=_--

------------------------------