On 03/06/03, Kurt Nauck wrote: > I have just received lab results back from Terry Tullos Wayland, who > is a paper conservator. > > He says: > > "Kurt, your DOF specimen is a moderately acidic pH 4.59." > > For what it's worth, there you have it. If you want to measure pH yourself on a small budget, check out the tropical fish hobbyist suppliers. They should have indicator dyes in stock which change color according to the pH. Regards -- Don Cox [log in to unmask]