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Q: how to make something not photocopy corrcetly ( No Answer,   3 Comments )
Subject: how to make something not photocopy corrcetly
Category: Science > Chemistry
Asked by: starwarssteve-ga
List Price: $20.00
Posted: 04 Oct 2006 12:29 PDT
Expires: 03 Nov 2006 11:29 PST
Question ID: 770793
i manage a video store and when i photocopy peoples ids some time i
notice stuff on them whitch i think is put on there by them so the i d
dosnt come out propely when photocopyed i would like to know what
things this could be so i can take action and tell other manages about
what it is and how to stop it (the stuff on the ids is see thourgh )

Request for Question Clarification by pafalafa-ga on 04 Oct 2006 12:51 PDT
I'm not sure how knowing how it's done will assist you at all, but here goes.

My guess would be they're using one of the varieties of "photo
blocking" sprays that are marketed as a way of preventing speed
cameras from photographing license plates:

Do you think that's it?


Request for Question Clarification by pinkfreud-ga on 04 Oct 2006 12:56 PDT
If it appears that a thin plastic film or tape has been applied on top
of the ID, it's possible that a lenticular film such as CopyGuard
might have been used.

The recently developed Copy Guard technology is a PET -based film
prepared with an optical system of UV-cast bars and lenticular ribs.
The system is designed to make it impossible to read any printed
material lying beneath the Copy Guard film when viewed perpendicularly
to the surface of the paper. Sensitive printed information is thus
protected from casual copying. The film can be applied to the entire
document or to a part thereof."

More info here:

Is this the kind of information you're looking for?

Clarification of Question by starwarssteve-ga on 08 Oct 2006 12:27 PDT
hi i dont think it is a spray or film or tape its abit grainy
There is no answer at this time.

Subject: Re: how to make something not photocopy corrcetly
From: nelson-ga on 04 Oct 2006 21:27 PDT
What I want to know is why crap like photguard and radar detector's aren't illegal.

Tell the "customers" that you cannot accept their altered, tampered-with document.
Subject: Re: how to make something not photocopy corrcetly
From: myoarin-ga on 05 Oct 2006 04:53 PDT
I believe the questioner means the the issuers of IDs use Copyguard or
other methods of making it impossible to photocopy the documents,
because they do not want them to be able to be duplicated  - a valid

My German driver's license has a lenticular ribbed field where the
number is and various other security features that either cannot be
photocopied or appear on a photocopy in a different way than they do
on the plastic card.

Someone operating a copyshop should not attempt to help someone bypass
these security features; it could be seen as counterfeiting.
Subject: Re: how to make something not photocopy corrcetly
From: nelson-ga on 05 Oct 2006 11:08 PDT
If such a feature is not built into the documnet, it is basically
tampering with a government-issued document for someone else to do so.
 Social Security cards have a warning against laminating.

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