|As described by Helios|
To calculate the expected final height you need to do a few calculations in the metric system. Weigh the glass in grams. Divide by specific gravity (2.5) to get the number of cubic centimeters. Divide the cc by the area enclosed by the dams in square centimeters. This will give the fraction or multiple of centimeters thick the glass is predicted to be.
The weight of glass = 500 gms
The specific gravity = 2.5
The area is 10cm by 10 cm = 100 square cm.
Divide 500gms (the weight) by 2.5 (the specific gravity) = 200 cubic centimeters. Divide 200 (the volume in cc) by 100 (the area) = 2 cm thick final piece for the amount of glass put into the pot.
This indicates the fibre paper should be 1.7cm high to allow enough space for the bullnose edge to form.