Digital BW, The Print

>"thinking out loud"....
>why is Hahnemuhle  photorag 188  approximately
>5 times the price of Epson EEM ?

One of the issues is cotton/acid-free v. wood-based paper.  Wood it cheap
and may have some other advantages.  The people who want archival products,
however, are willing to pay more for the acid-free cotton paper.

Wood-based paper can also be "acid-free" and "archival," but it costs more
money to remove the lignin (the acid reserve) from the wood pulp.  (Cotton
has no lignin, so it is inherently more stable.)

From what I can tell, if the lignin in wood-based paper is reduced to 1% or
less, and if the alkaline buffer is 2% - 3%, then wood paper can stay acid
free and be archival.

Here is an ironic potential twist --

While acid has long been considered the main threat to long paper life,
atmospheric pollutants are now also one of the largest threats to our
prints.  There is some evidence that lignin absorbs a disproportionate
volume of atmospheric pollutants and might act something like a "pollution
buffer" for the paper.

"The wider the spot of light, the larger the circumference of darkness."

Paul
http://www.PaulRoark.com

_____________________________________



On Friday, November 14, 2003, at 11:00 AM, Tim Atherton wrote:

> Epson Wide Format
>
> They were answering a specific question about non archival tape in the
> packaging damaging large format sheets
>
> tim
>
>> -----Original Message-----
>> From: Richard Sintchak [mailto:richcontaxg@...]
>> Sent: Friday, November 14, 2003 8:56 AM
>> To: Tim Atherton
>> Subject: Re: [Digital BW] Hahnem\ufffdhle will be listening in
>>
>>
>>
>> Friday, November 14, 2003, 7:48:34 AM, you wrote:
>>
>> TA> Looks like Hahnem\ufffdhle Germany will be listening in to our
>> concerns...
>>
>> TA> they have just popped up on another group to answer some
>> questions and
>> TA> listed the groups they listen to. They missed this one... so
>> I put them on
>> TA> to it. (BTW they say they have fixed the William Turner flaking)
>>
>> TA> tim
>>
>> Which group did they pop up on?
>>
>> --
>> Best regards,
>>  Richard                            mailto:richard@...
>>
>>
>>
>> Please visit the Group Homepage to check the Files, Bookmarks,
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Please visit the Group Homepage to check the Files, Bookmarks, Polls and
other resources as they are often being updated. The page is at:

http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint

If you wish to receive no emails or just a daily digest, or you wish to
unsubscribe, please edit your Membership preferences by visiting this same
page.

Please follow these basic guidelines:
- Include your full name with your message.
- Include the address of your website, if you have one.
- As threads develop, trim off excess portions of earlier messages to keep
them short.
- As the topic of a thread changes remember to change the subject header.
- Good manners are required at all time. No personal attacks or flames
- Complete your Yahoo profile.
- Before posting a question, search the message archives and the various
resources on the homepage.




Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/