Regarding ISO washing and desalting, I have been involed in that since 1965, it is merely a matter of getting commercially available PA gelatin. Nothing has been shared with me at all in any way whatsoever by anyone outside my circle of EK engineers. In fact, I have given the name of one of the sources of my PA gelatin out freely.
Nothing has been shared with me regarding spectral or chemical sensitization either. All that I have comes from EK or from EK fellow engineers. All that I share outside that circle is not proprietary.