while much of what PE said is true, if you go to thelightfarm you will see emulsions that people (WROTE AND ) MADE and USED ( including the OP ).
the emulsion i made 25 + years ago was made from a photographic book published for people who wanted to make and use
emulsions ... i dont' remember which one it was, but it was easy ( just a few ingredients ) the publishers didn't make up-stuff and it worked fine ... i haven't made the ones that are in the back of silver gelatin ( the liquid emulsion book )
and i haven't made the ones at the light farm, but the aj-12 emulsion published in the (apug's ) articles section is one that a lot of people have made and used.
its not all smoke an mirrors as some would suggest ...
i must admit it would be very nice to take a workshop with today's master-chefs ... it would be easy to see what it is supposed to be like instead
of a blind guess ..