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Klucel G

Discussion in 'The Grumble' started by bruce papier, Jul 6, 2019.

  1. bruce papier

    bruce papier MGF, Master Grumble Framer

    I have a project that may require the use of Klucel G. The instructions tend to call for mixing it with 95 - 99% isopropyl alcohol. I can get 91% no problem, but any higher concentration than that and it's treated like rocket fuel. My question is obvious- does mixing the Klucel with the lower concentration completely mess things up?
     
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  2. alacrity8

    alacrity8 MGF, Master Grumble Framer

    IFGL likes this.
  3. IFGL

    IFGL SGF, Supreme Grumble Framer

    I am gonna get so hammered!
     
  4. Rick Granick

    Rick Granick SPFG, Supreme Picture Framing God

    Klucel is soluble in alcohol or water. The reason alcohol is better is that it evaporates more quickly so is less apt to cause cockling. (There are other chemical reasons too, but they are above my pay grade.) Anyway, I think you would be fine with the 91% version. I have experimented a bit with the Klucel, but not yet enough to be fully confident with it. Like Methyl Cellulose, the bond may not be as strong as that with starch, but it depends on the circumstances of use. I believe the proper proportion for mixing is 1:1 with the alcohol. Stir well and let it gel. Hugh talks about it in an article in the latest PPFA newsletter.
    :cool: Rick
     
  5. bruce papier

    bruce papier MGF, Master Grumble Framer

    Thanks for the info, Rick.

    I'm going to make this a two for one question. I have two life-size graphite portraits (so they're big) on what appears to be 100 lb drawing paper. I hinged the first with 22 gram mulberry hinges and wheat starch applied as thinly as I could. The hinges are leaving slightly raised areas.

    Would the use of Klucel G solve the problem?

    I showed the problem to a local conservator and he felt the most likely explanation for the problem was the paper hasn't acclimated to the present environment. He was taking the paper still being slightly rolled as evidence.
     
  6. bruce papier

    bruce papier MGF, Master Grumble Framer

    Here's what I've found out so far by just dinking around with Klucel G. Lineco says to mix it 2:1 alcohol to powder. That appears to be (at least on my first try) too strong a mixture. I got translucent lumps that aren't "spreadable". I'm trying about 5:1 to see if it's easier to use. I will say this- at 2:1, it is sticky as all get out. A barely perceptible film holds like a tiger and doesn't cockle at all.
     
  7. Frances M.

    Frances M. CGF II, Certified Grumble Framer Level 2

    With it being dissolved in alcohol, how fast do you have to mix and apply to hinge and then art work? Can you pre-paste hinges and then re-activate with alcohol to apply hinges to artwork? Very interesting product.
     
  8. bruce papier

    bruce papier MGF, Master Grumble Framer

    You have to move pretty fast with the 2:1. I'm going to try the 5:1 today. I'll let you know how that works.
     
  9. bruce papier

    bruce papier MGF, Master Grumble Framer

    Tinkering update- 5:1 seems like a good ratio. The resulting gel is thicker than wheat paste, but still spreadable. The higher alcohol content gives you a little more time to get the hinge placed. The alcohol doesn't evaporate quite as quickly as I expected although it does so more quickly than water evaporates. I put some hinges on a test piece of 80 pound watercolor paper. You have to put on a layer of paste which is way thicker than you would want to try with wheat paste, but it sticks with good strength when dry. The area where Klucel G seems to excel is sticking hinges to poor quality, thin paper. I stuck a 50 gram hinge to a piece of note paper without being terribly careful and it stuck with no ripples.

    I like this stuff (so far, at least).
     
    cvm likes this.
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