things have progressed a long way since litmus :)

you can get pH indicator papers in a range of ranges :) and
resolutions. Scientific supply houses would be the place to start
looking. I have 3 sets in my hand right now:

one set, made by Macherey-Nagel, pH 4.5- 10.0 in 0.5 gradations
another set, made by EM Science, pH 6.5 - 10.0 in 0.3 gradations
lastly, also EM science, 6.5-1.0 in 0.2 gradations.

they all have particular colour changes and charts on the packages.

pH papers would be the cost effective solution for the occasion pH
tester.

Alistair

'82 westy, diesel converted to gas in '94
http://www.members.shaw.ca/albell/

On 11-Apr-05, at 2:23 PM, BenT Syncro wrote:

On Apr 11, 2005 1:55 PM, Don Spence <dkspence@telus.net> wrote:
> My brain has a gap where the name is stored but in Chem lab we used
> little strips of paper that you dipped in the solution. It changed
> colour relative to pH. You then compare to a standard colour chart.
>> pH meters for around the shop
>>
>

Don,

This is the litmus test of whether your memory is working or not. If
you can figure out the name of that funny colored paper and why I
spell color w/o a U, then you aren't senile yet after all.

--
BenT