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Your news that the back apertures of Zeiss objectives dissolves in methanol
was quite alarming!  Thanks for sharing that warning.  Regarding the First
Contact stuff; I make a point of never letting it touch anything other than
glass.  If I have to clean an optic, I only use it on the center.  I am
careful to stay away from the edges of any mount just in case the solvents
damage things.

Craig


On Thu, Jun 28, 2012 at 8:58 AM, Glen MacDonald <[log in to unmask]>wrote:

> *****
> To join, leave or search the confocal microscopy listserv, go to:
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> *****
>
> Treat it like any other solvent.  The product states very clearly to avoid
> contact with plastics and paint unless without carefully testing on an
> expendable subject.  It requires about 20 min to dry which would hold the
> solvent in contact with any lens glue situated beneath the plastic layer.
>  On the other hand, some lenses appear to have a relatively wide margin of
> glass between the polished region and the mountant.  In those cases maybe
> it could be applied carefully to avoid the glue.   But, who knows how the
> coating will behave? I found that the plastic back apertures of newer Zeiss
> objectives will dissolve in methanol!
>
> Glen
>
> Glen MacDonald
> Core for Communication Research
> Virginia Merrill Bloedel Hearing Research Center
> Box 357923
> University of Washington
> Seattle, WA 98195-7923  USA
> (206) 616-4156
> [log in to unmask]
>
>
>
>
> On Jun 28, 2012, at 1:52 AM, Steffen Dietzel wrote:
>
> > *****
> > To join, leave or search the confocal microscopy listserv, go to:
> > http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> > *****
> >
> > Has anybody tried this 'First contact' reagent for cleaning the front
> lenses of objectives? In theory, it should be perfect to clean e.g. concave
> lenses with narrow diameter without leaving residues.
> >
> > However, it contains acetone as a solvent, so I am wondering how the
> objective's glue is going to respond to that. Does this pose a risk or are
> current day objectives acetone resistant? The list of components from the
> MSDS:
> > FORMAL GLYCOL  10-40%
> > BIS(METHOXY)METHANE 10-30%
> > ETHYL ALCOHOL  30-50%
> > ACETONE  10-30%
> > ETHYL LACTATE  <10%
> > ETHYL ACETATE  <10%
> >
> > Cheers,
> > Steffen
> >
> >
> > On 27.06.2012 19:52, Craig Brideau wrote:
> >> *****
> >> To join, leave or search the confocal microscopy listserv, go to:
> >> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> >> *****
> >>
> >> Are you referring to "First Contact"?  It's a sort of polymer goo.  I
> first
> >> saw it at Photonics West and picked up a bit to try around my lab for
> >> cleaning really dirty mirrors.  It seems to work fairly well on things
> like
> >> grease, fingerprints and dust.  It does have some glue-like properties
> when
> >> it dries, but doesn't have a lot of hold strength (so you can peel it
> off
> >> to clean the optic!) so may not work great as a glue.  On the other
> hand,
> >> it may be just sticky enough to work as a temporary solution.  If you
> have
> >> a large contact area I think it would hold fairly well.  Do note that it
> >> doesn't play well with many plastics because of the solvents used to
> keep
> >> the polymer liquid for the initial application...
> >>
> >> Craig
> >>
> >>
> >>
> >> On Wed, Jun 27, 2012 at 3:29 AM, Horn Thomas<[log in to unmask]
> >wrote:
> >>
> >>> *****
> >>> To join, leave or search the confocal microscopy listserv, go to:
> >>> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> >>> *****
> >>>
> >>> Hi Tobias,
> >>> A colleague showed to me a polymer that is made to clean optical
> surfaces.
> >>> It works like a glue: you pour it onto the surface, it polymerizes and
> then
> >>> you peel it off like silicon with all the dirt and dust. So it should
> work
> >>> temporarily like also as an adhesive to stick a mirror to another
> surface.
> >>> The advantage is, its made for optics so it will not harm any coatings
> or
> >>> delicate surface. See link below
> >>> Best regards,
> >>> Thomas
> >>> ETH
> >>> Basel
> >>>
> >>>
> >>> No commercial interest
> >>>
> >>>
> >>> http://www.photoniccleaning.com/products/#original solutions
> >>>
> >>>
> >>>
> >>>
> >>>
> >>> -----Original Message-----
> >>> From: Confocal Microscopy List [mailto:
> [log in to unmask]]
> >>> On Behalf Of Mark Cannell
> >>> Sent: Montag, 25. Juni 2012 17:45
> >>> To: [log in to unmask]
> >>> Subject: Re: Removable glue for optics
> >>>
> >>> *****
> >>> To join, leave or search the confocal microscopy listserv, go to:
> >>> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> >>> *****
> >>>
> >>> Three thoughts:
> >>>
> >>> PVA blobs which can be peeled after setting or hot glue (stronger
> -harder
> >>> to peel). Nail varnish  is good too. I've used all 3 but YMMV
> depending on
> >>> area of contact etc.
> >>>
> >>> HTH
> >>>
> >>> Mark
> >>>
> >>>
> >>> On 25/06/2012, at 4:38 PM, Tobias Rose wrote:
> >>>
> >>>> *****
> >>>> To join, leave or search the confocal microscopy listserv, go to:
> >>>> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> >>>> *****
> >>>>
> >>>> Dear all,
> >>>>
> >>>> I need to glue some glass optics onto anodized aluminum surfaces
> (edges
> >>> of coated dichroic mirror surface and of a full reflective silver
> mirror).
> >>> The problem is that I'd like to be able to remove the mirrors at some
> point
> >>> without completely ruining their reflective surfaces and leaving too
> much
> >>> residue on the glass and aluminum.
> >>>> The glued parts are not in the optical path so the glue does not have
> to
> >>> be transparent. Also the glue can be quite weak, just enough so that
> the
> >>> mirrors don't fall off.
> >>>>
> >>>> Can anyone suggest a nice glue for that?
> >>>>
> >>>> Best,
> >>>> Tobias
> >>>
> >>
> >
> >
> > --
> > ------------------------------------------------------------
> > Steffen Dietzel, PD Dr. rer. nat
> > Ludwig-Maximilians-Universität München
> > Walter-Brendel-Zentrum für experimentelle Medizin (WBex)
> > Head of light microscopy
> >
> > Mail room:
> > Marchioninistr. 15, D-81377 München
> >
> > Building location:
> > Marchioninistr. 27,  München-Großhadern
>