OT:how to delaminate laminated paper?

N

N_Cook

Guest
Browned plastic, perhaps 1970s, covering still fairly white paper.
Inserting a razor , only wants to split the paper into 2. Hot air seems
to just distort the plastic
 
On 23/04/14 15:58, N_Cook wrote:
Browned plastic, perhaps 1970s, covering still fairly white paper.
Inserting a razor , only wants to split the paper into 2. Hot air seems
to just distort the plastic
Click to expand...

Can you scan it and correct in photoshop etc then reprint new ??
 
On 04/23/2014 12:58 AM, N_Cook wrote:
Browned plastic, perhaps 1970s, covering still fairly white paper.
Inserting a razor , only wants to split the paper into 2. Hot air seems
to just distort the plastic
Click to expand...

Depending on how valuable, you could try the method for restoring
plastic computer cabinets:

http://retr0bright.wikispaces.com/

John :-#)#

--
(Please post followups or tech inquiries to the newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
(604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."
 
On Wed, 23 Apr 2014 07:12:00 -0700, John Robertson <spam@flippers.com>
wrote:

On 04/23/2014 12:58 AM, N_Cook wrote:
Browned plastic, perhaps 1970s, covering still fairly white paper.
Inserting a razor , only wants to split the paper into 2. Hot air seems
to just distort the plastic

Depending on how valuable, you could try the method for restoring
plastic computer cabinets:

http://retr0bright.wikispaces.com/

John :-#)#
Click to expand...

I suspect the paper is shearing into to two layers: top stuck to
something, bottom stuck to something, and the paper layer itself is
failing.

If you want to 'dissolve' the paper use straight bleach, soak for a while,
rinse. the bleach will destroy the cellulose fibres so the paper will peal
off just like you were accomplishing with a razor blade. Check for
excessive temperature rise, and rinse early if gets too hot.
 
On Wed, 23 Apr 2014 08:58:13 +0100, N_Cook <diverse@tcp.co.uk> wrote:

Browned plastic, perhaps 1970s, covering still fairly white paper.
Inserting a razor , only wants to split the paper into 2. Hot air seems
to just distort the plastic
Click to expand...

Freeze it to embrittle the adhesive?
 
On 23/04/2014 15:23, RobertMacy wrote:
On Wed, 23 Apr 2014 07:12:00 -0700, John Robertson <spam@flippers.com
wrote:

On 04/23/2014 12:58 AM, N_Cook wrote:
Browned plastic, perhaps 1970s, covering still fairly white paper.
Inserting a razor , only wants to split the paper into 2. Hot air seems
to just distort the plastic

Depending on how valuable, you could try the method for restoring
plastic computer cabinets:

http://retr0bright.wikispaces.com/

John :-#)#


I suspect the paper is shearing into to two layers: top stuck to
something, bottom stuck to something, and the paper layer itself is
failing.

If you want to 'dissolve' the paper use straight bleach, soak for a
while, rinse. the bleach will destroy the cellulose fibres so the paper
will peal off just like you were accomplishing with a razor blade. Check
for excessive temperature rise, and rinse early if gets too hot.
Click to expand...

Sorry, I'm trying to salvage the paper for posterity, not the plastic
wrapping. In comparison removal of old browned selotape is a doddle,
warm with hot air and then nullify the gum by rubbing-in talc.
 
On 23/04/2014 15:29, Rich Webb wrote:
On Wed, 23 Apr 2014 08:58:13 +0100, N_Cook <diverse@tcp.co.uk> wrote:

Browned plastic, perhaps 1970s, covering still fairly white paper.
Inserting a razor , only wants to split the paper into 2. Hot air seems
to just distort the plastic

Freeze it to embrittle the adhesive?
Click to expand...

That was the next I was going to try, shame I've no access to liquid
nitrogen, anyone handled flowers after being dunked in it ?.
Is glue part of the lamination process?
 
On Wed, 23 Apr 2014 15:41:00 +0100, N_Cook <diverse@tcp.co.uk> wrote:

On 23/04/2014 15:29, Rich Webb wrote:
On Wed, 23 Apr 2014 08:58:13 +0100, N_Cook <diverse@tcp.co.uk> wrote:

Browned plastic, perhaps 1970s, covering still fairly white paper.
Inserting a razor , only wants to split the paper into 2. Hot air seems
to just distort the plastic

Freeze it to embrittle the adhesive?


That was the next I was going to try, shame I've no access to liquid
nitrogen, anyone handled flowers after being dunked in it ?.
Is glue part of the lamination process?
Click to expand...

Both the hot-roller and peel-off-sticyback lamination sheets have some
kind of glue. Freezing is probably non-destructive with respect to the
paper (although down to liquid N2 temperatures? Don't know.) I'd try
just leaving it in a regular freezer first and then move on to dry ice
if that didn't work. Maybe invert a container of "canned air" (don't
try this at home kids!) to freeze just a corner to see if there's any
change in the adhesion.
 
On 04/23/2014 7:41 AM, N_Cook wrote:
On 23/04/2014 15:29, Rich Webb wrote:
On Wed, 23 Apr 2014 08:58:13 +0100, N_Cook <diverse@tcp.co.uk> wrote:

Browned plastic, perhaps 1970s, covering still fairly white paper.
Inserting a razor , only wants to split the paper into 2. Hot air seems
to just distort the plastic

Freeze it to embrittle the adhesive?


That was the next I was going to try, shame I've no access to liquid
nitrogen, anyone handled flowers after being dunked in it ?.
Is glue part of the lamination process?
Click to expand...

You may have access to liquid nitrogen - if you are in a city of any
reasonable size they should have businesses for making liquid oxygen for
hospitals. When I was a kid I would ride down to the local Liquid Air
pland and get a thermos of liquid NO2. Not sure today if it is that
easy, but never hurts to ask!

Here in Vancouver there are many users of NO2 - here is one application:

http://www.nitropipefreeze.com/

I'm sure you can find more! Search Liquid Nitrogen and your city & state
and see what turns up...

John :-#)#

--
(Please post followups or tech inquiries to the newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
(604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."
 
N_Cook <diverse@tcp.co.uk> wrote:
On 23/04/2014 15:29, Rich Webb wrote:
On Wed, 23 Apr 2014 08:58:13 +0100, N_Cook <diverse@tcp.co.uk> wrote:

Browned plastic, perhaps 1970s, covering still fairly white paper.
Inserting a razor , only wants to split the paper into 2. Hot air seems
to just distort the plastic

Freeze it to embrittle the adhesive?


That was the next I was going to try, shame I've no access to liquid
nitrogen, anyone handled flowers after being dunked in it ?.
Is glue part of the lamination process?
Click to expand...

It's unlikely you need anything that cold, plus it's most likely going to
be a PITA to get, and may just destroy the paper along with the plastic.
You can't easily "sort of cool" someting thin with liquid nitrogen
anyways.

Try to find a small chunk of dry ice or a can of freezy spray for
electronics (this is sci.electronics.repair).
 
Tried freezer spray then hammer on an anvil, no breakup.
Considering the paper is virgin white, unlike any contemporaneous paper,
perhaps leave it in its protective wrap. Then hope the degree of
browning of the plastic over more decades is less than the paper
browning, plus scanning for conservation of data purposes
 
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