Добър ден господин български,
Why do you want to go down
79% sounds like a good level for the phase that follows just after the fermentation.
What is your ideal about a "right" RH level ?
If you use starter cultures then the humidity should be at least 92% and preferably 98% during the first 36 - 48 hours of the fermentation phase.
Then, after pH has dropped to 5,25 or below, you can start decreasing humidity to 80% and temperature to 18C and continue ripening at even lover temperatures (12 - 16C) and also lower RH even further (70 - 60%).
However, if you do not use starter cultures you probably ferment at lower temperatures than 20C (?)
In that case humidity does not have to be quite as high. 75 - 80% should be sufficient depending on temperature.
What are your present parameters, and what is the largest calibre you make ?
I could be afraid that with a lower humidity than 75% you would risk a dry rim under the casing, preventing a efficient drying out.
But many different factors contribute and I am not the person who wants to present the "universal key".
Does the mould on the sausages borther you or do you leave it to grow naturally?
By the way: You may contribute to a previous thread about how to make
real Sudziuk (Sucuk, Suđuk, Суджук) Balkan style. I guess we are many who would appreciate
