For those reading this thread, we worked with this poster and the professor involved with this project off list, and found that their whites were turning gray using the LOGO Classic algorithm in ProfileMaker. They were also using ProfileMaker version 5.0.5b which is outdated. The current version of ProfileMaker is 5.0.8.
With these changes they were able to get a conversion from their Gravure to their HP without whites turning gray.