[NHCOLL-L:2364] Re: Insects and glue

[Timothy J. Tomon]

One last comment...sorry it was so controversial...

Shellac Gel is available from Bioquip...Is that "widely available"?  Or are 
you referring to the entire globe?

Tim

At 06:21 PM 6/21/2004, David Furth wrote:
>I am not sure it is worth continuing this discussion at this point, since 
>there are obviously differing opinions and some mis-interpretation.  It 
>seems that some statements have "gummed up" the works and most seem to be 
>"stuck" on their ideas anyway.
>
>Again, based on the experience of many here and many other places:
>
>Elmer's Glue (white), water soluble, OK, widely available.
>Hide Glue, water soluble, OK, widely available.
>Many other kinds of water soluble glues, OK, not widely available.
>Shellac Gel, ethanol soluble, OK, not widely available.
>Nail Polish, acetone/ethyl acetate soluble, not so great, widely available.
>
> >>> Doug Yanega <dyanega at ucr.edu> 06/21/04 04:13PM >>>
>Jim Druzik wrote:
>
> >Elmer's glue is definitely not good.
>
>and
>
> >I have had animal glues that required enzymes for removal on
> >old works of art mounted on boards.
>
>after having said earlier:
>
> >  >I beg to differ on your comment about water soluble gums. Polysaccharides
> >>can crosslink but they are more prone to hydrolytic chain rupture which
> >>increases solubility.  Since they are fully amorphous you're just not going
> >  >to get insolubility.
>
> >and Dave Furth wrote:
> >
> >>My experience is also with small critters and with mounting
> >>techniques and glues from around the world and going back well over
> >>100 years.  I have not experienced the problems Doug mentions with
> >>removing specimens or parts thereof with warm/hot water or with
> >  >dissecting them.
>
>Maybe I'm a bit dense, but Dave Furth and others have been calling
>Elmer's Glue (= "white glue") and hide glue "water-soluble". When
>they said those were good, you implied they were okay, but now you're
>CLEARLY saying they're bad, which directly contradicts the earlier
>comments. So, what widely-used "water-soluble" glues were *you*
>referring to when you said above that they increased in solubility
>over time, if you weren't referring to white or hide glue?
>
>So, let's recap:
>
>White glue (Elmer's, etc.) = water-soluble, but BAD
>Hide glue = water-soluble, but BAD
>???? = water-soluble, but GOOD
>PVOH = alcohol-soluble, and GOOD
>
>Do I have that correct now?
>--
>
>Doug Yanega        Dept. of Entomology         Entomology Research Museum
>Univ. of California - Riverside, Riverside, CA 92521
>phone: (909) 787-4315 (standard disclaimer: opinions are mine, not UCR's)
> 
><http://cache.ucr.edu/~heraty/yanega.html>http://cache.ucr.edu/~heraty/yanega.html
>    "There are some enterprises in which a careful disorderliness
>          is the true method" - Herman Melville, Moby Dick, Chap. 82

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