Denise, boiled emulsions at 95C were common in the early part of the last century. They were not ammonia emulsions.

Since ammonia was not mentioned, I used that example, as temperature is a valid "knob" with or without ammonia the absolute upper value depending on ammonia. I make ammonia emulsions at 60C without fog problems.

I made the correction to clarify my remarks. Thanks.

PE