[alt-photo] Re: Testing Paper PH

[ender100 at aol.com]

Hey Greg,  Thanks for the link!  I appreciate it!





-----Original Message-----
From: G Schmitz <coldbay1 at gmail.com>
To: The alternative photographic processes mailing list <alt-photo-process-list at lists.altphotolist.org>
Sent: Wed, Jul 28, 2010 10:08 pm
Subject: [alt-photo] Re: Testing Paper PH


The primary methods for testing pH in paper conservation involve using either "hot extraction" or "cold extraction."  It is usually best to used distilled or boiled and cooled water since CO2 concentrations in the water can lead to a "false" reading. 
 
See for example: 
 
http://ipstesting.com/T509pHcoldextract/tabid/155/Default.aspx 
 
searching ConsDist might also provide some insights: 
 
http://cool.conservation-us.org/byform/mailing-lists/cdl/ 
 
--greg 
 
P.S. I know this topic has been discussed at some length before.  Might be worth giving the archives a poke. 
 
 
On 7/28/10 4:11 PM, ender100 at aol.com wrote: 
> I'll give it a try when I get the litmus paper. 
> 
> 
> No need for an apology Paul. 
> 
> 
> Mark 
> 
> Mark, 
> 
> I don't think that would work, but try it with a known highly alkaline paper. 
> 
> So sorry if I mispoke about PDN in earlier posts yesterday in reply to a question. I should've just referred them to you in the first place. 
> 
> Let's talk soon... 
> 
> Paul 
>>> Mark Nelson 
>>> www.PrecisionDigitalNegatives.com 
>>> www.MarkINelsonPhoto.com 
>>> PDNPrint Forum @ Yahoo Groups 
> 
> 
>> Wetting the paper first with distilled water I might add. 
>> 
>> Mark Nelson 
>> www.PrecisionDigitalNegatives.com 
>> PDNPRint Forum @ Yahoo Groups 
>> www.MarkINelsonPhoto.com 
>> 
>> sent from my iPhonetypeDeviceThingy 
>> 
>> On Jul 28, 2010, at 4:54 PM, ender100 at aol.com wrote: 
>> 
>>> I was trying to test the ph of a paper and found that my ph pen seems to>>  have bitten the dust.  It indicates basic regardless of what I test—even>>  my favorite balsamic vinegar seems to have turned alkaline. 
>>> 
>>> 
>>> Would just wetting the paper and dabbing it with ph testing paper give>>  decent results? 
>>> 
>>> 
> 
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