Using a Screen Breather with a Vacuum Veneer Press

      Placing a screen between the press and the piece helps create uniform pressure and prevents veneer bubbles. October 14, 2008

Has anyone had success (or failure) using fiberglass window screen material as a breather in a vacuum press?

Forum Responses
(Veneer Forum)
From contributor C:
I have used fiberglass window screen material in my bag press for several years. The screen is duct taped (at the ends only) to a loading panel (1/2" plywood). The screen slightly overhangs the sides of the plywood. I use a piece of polyethylene plastic sheeting on top of the screen (also taped at the ends but not the sides). I lay up my work on top of the polyethylene, then slide the loaded panel into the bag like a tray. Inside the bag, the loading panel sits on top of a conventional bleeder panel (scored melamine). Because the screen overhangs the plywood, the vacuum easily feeds from the bleeder panel to the screen under the plastic. When the glue has cured, I slide the loader out of the bag and peel the veneered parts from the plastic. I have used the same piece of screen for a couple of years, and usually get dozens of loadings from each change of plastic. The screen works well on curved parts also.

From contributor D:
I use vacuum for veneering and am wondering what the purpose is of the screen you are using.

From contributor C:
Without the screen, I used to occasionally get small air bubbles under certain veneers, places where the glue didn't take. Because the grooves in the bleeder board have some space between them, the vacuum doesn't reliably reach every square inch of a panel. Without a screen, the substrate presses the veneer tightly against the bleeder board, and effectively seals the area between the bleeder grooves, sometimes leaving air pockets. With the screen, the vacuum reaches all parts of the panel and sucks any air through the veneer. So, no bubbles.

Would you like to add information to this article?
Interested in writing or submitting an article?
Have a question about this article?

Have you reviewed the related Knowledge Base areas below?
  • KnowledgeBase: Knowledge Base

  • KnowledgeBase: Veneer

  • KnowledgeBase: Veneer: Techniques

    Would you like to add information to this article? ... Click Here

    If you have a question regarding a Knowledge Base article, your best chance at uncovering an answer is to search the entire Knowledge Base for related articles or to post your question at the appropriate WOODWEB Forum. Before posting your message, be sure to
    review our Forum Guidelines.

    Questions entered in the Knowledge Base Article comment form will not generate responses! A list of WOODWEB Forums can be found at WOODWEB's Site Map.

    When you post your question at the Forum, be sure to include references to the Knowledge Base article that inspired your question. The more information you provide with your question, the better your chances are of receiving responses.

    Return to beginning of article.

    Refer a Friend || Read This Important Information || Site Map || Privacy Policy || Site User Agreement

    Letters, questions or comments? E-Mail us and let us know what you think. Be sure to review our Frequently Asked Questions page.

    Contact us to discuss advertising or to report problems with this site.

    To report a problem, send an e-mail to our Webmaster

    Copyright © 1996-2019 - WOODWEB ® Inc.
    All rights reserved. No part of this publication may be reproduced in any manner without permission of the Editor.
    Review WOODWEB's Copyright Policy.

    The editors, writers, and staff at WOODWEB try to promote safe practices. What is safe for one woodworker under certain conditions may not be safe for others in different circumstances. Readers should undertake the use of materials and methods discussed at WOODWEB after considerate evaluation, and at their own risk.

    WOODWEB, Inc.
    335 Bedell Road
    Montrose, PA 18801

    Contact WOODWEB

  • WOODWEB - the leading resource for professional woodworkers

      Home » Knowledge Base » Knowledge Base Article