Mounting issue

[PaulSF]

So a client brought in a poster to be framed -- it's a display item for a chiropracter, and it's laminated on both sides. The poster has not been mounted to anything, and I'm wondering how I would mount the thing. We aren't using mats -- just the poster, frame and glass (yeah yeah, I know). Will the lamination prevent me from drymounting the poster using Speedmount?

[DTWDSM]

No, we do it all of the time, just did it for a dentist on 12 pieces, did a regular dry mount. Speedmount should work just fine

[Emibub]

You might want to use some sandpaper on the side being dry mounted to give it some "tooth" to hold to the adhesive.

[Bill Henry-]

In those cases, I am hesitant to dry mount. Tim may be right, you could get away with it, but I am always concerned that the heat will “de-glossify” the surface. I almost always use PMA.

I just finished one of those for a vet’s office. (It was a terminally cute golden retriever with a stethoscope).

So, I scuff the back of the poster using sand paper (I have begun to use a rotary hand sander with a very fine grit – I find I get a more uniform “tooth” to the poster.)

Once it is roughened up, I wipe the back with lighter fluid (naphtha) to remove the dust and residual oils, and apply the PMA to it. I generally mount it onto Rag Foam Board since it seems to “grab” the PMA better than the smooth stuff.

I actually talked him out of using glass (Newton’s rings and all that).

[DTWDSM]

Bill did mention something that I forgot, if they do want glass make sure to use a glass spacer on it. Frametek's 1/8 works great and it gives you a little extra money.

[PaulSF]

Thanks for the advice...I'll rough up the backside (hmmmm, sounds appropriately kinky), and incorporate some spacers. Wasn't aware of the glass-on-lamination issue, but now I am.

[Jim Miller]

I'm with Bill on this one...laminating is a heat process. Depending on the laminate's adhesive, re-heating to dry mount it could degrade the bond. That might show up later as a bubble between the laminate sheets, or it might fail immediately and come loose.

It is best to rough up the surface of the plastic, no matter what sort of adhesive is used. I suggest a contact type adhesive, such as Lascaux, or maybe Mighty Muck would work. Sprays, such as 3M Super 77, fail too soon, IMHO.

[Ron Eggers]

Wasn't aware of the glass-on-lamination issue, but now I am.

Yes, the two smooth surfaces in direct contact could result in the dreaded Newton Rings. :eek:

http://www.fas.harvard.edu/~scdiroff/lds/LightOptics/NewtonsRings/NewtonsRings010.jpg

[Terry Hart cpf]

I think I'm hipmotized. cluck

[Val]

Newton's Rings....so that's what those things are called!! I never knew(ton) they had a name! Ha! Another thing I've learned today...
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[BILL WARD]

I have , in the past, done these things using perfectmount---roughup, stickdown, put into vacuum press for @15min, weight down with mats-overnight or over weekend.......easy to do& 1-3 years later they havent come back from delam