Digital BW, The Print

Paul,

That Bromcresol Green pen only measures to about 5.6 on the pH scale.

Would a chemical such as Bromcresol purple be a better indicator 
since it measures to 6.8?

http://chemistry.about.com/library/weekly/aa112201a.htm?
iam=momma_100_SKD&terms=%22bromcresol+green%22

I thought that in regard to "acid-free", we were looking for a pH of 
7.0 +/- .5 .

I'm talking in general terms here, not neccessarily about Silver Rag 
here. I was going to post this question to you and logged on and saw 
this post.

Any thoughts?

Thanks,

Scott
--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Paul Roark" 
<paul.roark@...> wrote:
>
> 
> 
> > ... Is it acid-free? Maybe buffered? 
> 
> Yes, the acid test pen indicates it's well buffered.
> 
> > Does it contain optical brighteners?
> 
> No, the UV light indicates there are no optical brighteners in it.
> 
> Paul
> www.PaulRoark.com
>