[Printers] obfuscate dots?

[Rein]

dear Constantin,

Yes, you're right, I live in the Netherlands, in Leiden, about half an  
hour by bike from the North Sea.

What I discovered so far about the Austrian stamps is that the OeSD  
[Österreichische Staatsdruckerei] probably had started off in july 2003  
with a pilot using 2 or 3 Xerox machines, than at the end of 2003 when the  
project got flying bought a bigger one, and eventually replacing that one  
around june 2005. I can tell that from the MICs I have so far (15x8  
matrix):

25.87.02.57 [pilot, november 2003]
11.20.32.82 [pilot, october 2003]

I haven't seen these two machine codes after january 2004.

65.80.02.37 [january 2004 - may 2005]
86.74.78.38 [august 2005 - today]

Not always the time+date dots are there! Could they switch that off?


It would be nice to have an 'official' confirmation from the ÖSD and have  
the specific Xerox machine types identified. I would need a contact there  
in the Printing Works, after what I can try to get an 'audience' there  
arranged through the Editor in Chief of my magazine later on.

Finding more material - i.e. stamps of that particular type - personalised  
- is virtually impossible here. I won't find used stamps here, you might  
find them in Austria more easily. The unused stamps I have so far I bought  
on Ebay.

http://www.xs4all.nl/~dziewon/fila/various/hund_01.jpg

I scanned an used stamp I received recently to show you the type of stamps  
involved. Unfortunately this was printed in a different matter - in  
offset-litho for prestige booklets - and showing no dots! But you can't  
tell that from the scan, can you :)

grüße, Rein


On Mon, 16 Apr 2007 09:43:42 +0200, Constantin Hofstetter  
<Consti at Consti.de> wrote:

> Hi Rein!
>
> I am in Austria (Vienna) - since your domain is somewhere in the
> Netherlands I supposed
> you are not in Austria right now -
>
> I would be happy to help you gather stamps / informations about the
> Austrian stamps;
>
> Please let me know if I can help / participate in your research!
>
> Thanks a lot,
>
> Consti
>
> On 4/16/07, Rein <dziewon at xs4all.nl> wrote:
>>
>> dear yellowdots_finders!
>>
>> I'm relatively new to this subject. I write about about postage stamps  
>> and
>> their printing technics and I am preparing an article about the Austrian
>> personalised stamps. Examining them I found clouds of yellow dots  
>> printed
>> on them and I just thought it was a security device made by the Austrian
>> State Printing Works. Then two weeks ago an article appeared in the  
>> Michel
>> Rundschau saying that similar dots were found on the Spanish  
>> personalised
>> postage stamps. The State Printer in Vienna has disclosed than that the
>> dots are made by their Xerox DocuColor and that it reveals the machine
>> identification code plus a time+date indication.
>>
>> Having gathered lots of these stamps I found out that the MICs were  
>> there
>>  from the beginning i.e. late 2003 and finding your articles on  
>> www.eff.org
>> I started to look out for similar prints on other personalised stamps.
>>
>> I haven't found any on Belgian ones yet [since 2001] but did find  them  
>> on
>> the Dutch personalised stamps from the very beginning in mid 2003! All
>> Dutch items had been printed on 4 Ricoh Aficio CL5000 till late 2005.
>>
>> Other than mentioned in the EFF article, the matrix is 8x7 (apart from  
>> the
>> 2 dots at the top right) and not 15x8.
>>
>> http://www.xs4all.nl/~dziewon/fila/various/waz_docu2   (Austria, late  
>> 2003)
>>
>> http://www.xs4all.nl/~dziewon/fila/various/ricoh_cl5000 (Netherlands,  
>> mid
>> 2003)
>>
>> The scans I made are with HP PrecisionScanPro using a 1200 dpi  
>> resolution
>> and getting predominantly yellow.
>>
>> http://www.xs4all.nl/~dziewon/fila/various/HP_scan
>>
>> I continue examining the personalised as they also have a more or less
>> known date of issue [and of use as indicated by cancellations.
>>
>> groetjes, Rein
>>
>>
>>
>> On Mon, 16 Apr 2007 02:55:48 +0200, Seth David Schoen <schoen at eff.org>
>> wrote:
>>
>> >
>>
>> --
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>



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