Hi,
Now this is from Ricki Carrols book and I have never done this but, She writes
"The traditional method for testing acidity at the curd stage is to squeeze a piece of curd between your fingers until it's dry. rub it on a hot iron frying pan. In a continuous motion slowly draw the curd away from the pan. The length of the thread indicated the amount of acidity"
1/4 inch .17%-.19%
1/2 inch .24%
3/4 inch .45%
1 inch .65%
1 and 1/2 inches .85%
2 inches .95
remember that acidity doesn't mean pH and you will need to find a way to convert from Acidity Percentage to pH. Ph goes from 14 - 7.0 - 0 7.0 being neutral and below 7 more acid and above 7 more alkaline.
Hope that leads you into a cheaper solution. It wont be super accurate but it will be cheap.
I used a product called duo Strip for quire a while and was reasonable effective.
Mal
