Jump to content
Ultimaker Community of 3D Printing Experts

what is _minimum_ humidity for PVA?


lukejaeger
 Share

Recommended Posts

Posted · what is _minimum_ humidity for PVA?

We started using a PolyBox and vacuum containers to keep our PVA from absorbing too much moisture during the extremely rainy summer & fall.
Now it's winter and we have the opposite problem. PVA gets so dry and brittle that it snaps like raw spaghetti when you try to load it.

 

We converted our PolyBox into a humidor by putting a damp sponge inside it instead of desiccant, plus a little muffin fan to circulate the air in there. At this moment, the PolyBox sensor says the humidity is 85% in the box (while general humidity readings in the rest of the room have been between 25% and 35%).

What is the _minimum_ humidity level we should be aiming for in our makerspace? 

  • Link to post
    Share on other sites

    Posted · what is _minimum_ humidity for PVA?

    I would have sponaneously claimed that PVA feels most comfortable between 20% and 30%.

    At 85% it no longer breaks, but it does stick together. So it's more likely to be between 30 and 40%.

     

    For a makerspace, I would lean towards between 40 and 50%.

  • Link to post
    Share on other sites

    Create an account or sign in to comment

    You need to be a member in order to leave a comment

    Create an account

    Sign up for a new account in our community. It's easy!

    Register a new account

    Sign in

    Already have an account? Sign in here.

    Sign In Now
     Share

    • Our picks

      • New here? Get ahead with a free onboarding course
        Hi,
         
        Often getting started is the most difficult part of any process. A good start sets you up for success and saves you time and energy that could be spent elsewhere. That is why we have a onboarding course ready for
        Ultimaker S5 Pro Bundle, Ultimaker S5, Ultimaker S3 Ultimaker 2+ Connect.   
        They're ready for you on the Ultimaker Academy platform. All you need to do to gain access is to register your product to gain free access. 
        Ready? Register your product here in just 60 seconds.
          • Like
        • 11 replies
    ×
    ×
    • Create New...