It is possible that at least some of these cloudy
areas may be due to an incomplete reaction of the
Opticon with the hardening agent. To test this, we
placed a small amount of Opticon on a glass
microscope slide and incompletely mixed it with a
drop of the hardening agent. After approximately
20 minutes, we noted whitish, swirled, "cloudy"
areas interspersed with still-colorless, transparent
areas. This suggests that the hardening agent may
partially penetrate the filled brealz and cause an
incomplete localized reaction.