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Thread: Transparent Guide Wraps

  1. #1
    Kevin Graybeal
    Guest

    Transparent Guide Wraps

    A tutorial on transparent guide wraps with two part epoxy rod finish, as shown in RodCrafters Journal, V36N3, Fall 2010
    Attached Files Attached Files
    Last edited by Kevin Graybeal; 05-16-2011 at 05:19 PM. Reason: using rod finish- not varnish

  2. #2
    Kevin Graybeal
    Guest
    It has come to my attention that someone has had problems with getting Bullard SP-101 silk (Natural Tan) to go completely transparent.
    No need to reinvent the wheel... the trick is here for you in this tutorial.
    Any CP or urethane based finish will act as a color preserver, to a greater or lesser degree, on the silk and prevent it from becoming transparent. (transparent - not translucent. The two effects are very different in this case)


    Also -

    To those who have worked with this technique and have had problems with "shimmers" in the thread after it's finished, try this simple trick I discovered to eliminate them;

    Gently burnish as you normally would after wrapping to eliminate any gaps in the thread. (silk is very slick and will not "hold" itself like nylon or poly's will)

    After applying the thinned finish to the wrap, take your burnishing tool (not one made from buffalo horn) and burnish the micro-bubbles out (they are the cause of those "shimmers" - the effect looks like fine silver metal flake throughout the thread/finish)...

    BUT - when burnishing the bubbles out of the finish-wet silk, don't burnish as you normally would. (horizontally, lengthwise with the blank, across the thread wrap)
    Instead, gently burnish the bubbles out using a vertical motion - running the same way as the thread is wrapped. (in other words, the exact opposite of how you would normally burnish a wrap)

    Work on one wrap at a time before moving on to the next. That way you're working with the finish while it's still thin enough to "massage" the shimmers out. (I never work on more than three at a time when doing transparent wraps - after those set up, I do three more the next day)
    If you take your time, it's fairly easy to produce perfectly transparent wraps without any shimmers or bubbles at all.
    WARNING - DON'T USE HEAT - that will 'boil' the finish and actually make more bubbles. (remember - this technique uses a volatile solvent to thin the finish - it will bubble at a lower temp than straight finish without thinner)

    Also, be sure and use a bright work light and high magnification as you work so you can see the shimmers and burnish them out - if not, you'll find them later outside in the sunlight for sure. They're tiny, but the effect they produce is like fine metal flake, so take your time to get them all out. The results are more than worth what little extra effort may be involved to remove them.

  3. #3
    Terry Goode
    Guest
    left side is shimmers , right none, sloppy example but an example anyway.
    Attached Thumbnails Attached Thumbnails clear-thread 001.jpg  

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