Re: gas

shhhhh, Jack, the last statement about oxide was relating to tonal inversion
of gum, not Epson inks...I'll forward this info onto the person who wrote.
Thanks...
Chris
----- Original Message -----
From: "Jack Fulton" <jefulton1@comcast.net>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Saturday, February 04, 2006 12:19 PM
Subject: Re: gas

> I'm not too sure re the last sentence as it implies there is an oxide in
> the inks of Epson?
> But, I think . . think mind you . . that Epson inks in the Ultrachrome
> variety VS the dye . . are
> encapsulated. So, on a luster paper, which many photographers prefer (or
> semimatte) due
> to the greater DMax hence deeper black hence greater apparent contrast,
> that on this luster
> paper the inks 'sit'. Whereas on matte papers, the inks 'sink' into the
> paper. The inks lying upon
> the surface, minus the encapsulation, tend to off-gas. If I remember
> correctly, Epson has
> recommended that one allow such paper/ink combos to off-gas for a while
> (maybe a couple of
> weeks or more) prior to placing behind gas. So, after my long blah, blah
> and more blah, here,
> it is indeed not wise to put a 'fresh' print behind glass.
> Jack Fulton
>
>
>
>
> On February2006, at 10:16 AM, Christina Z. Anderson wrote:
>
>> Do you all have an answer for this question I got today?? Is this
>> Epson's idea of "printing on glass?"
>>
>> "As you may recall, I had a show up in Whitefish for about 4 months.
>> Several of the photographs were inkjet from the Epson 2200. When I got
>> the show back, the darker parts of the inkjet prints had gassed (I think
>> that is the word) so that there was a very thin white film on the inside
>> of the glass over the dark parts of the prints.
>>
>> What do you know about that. Can something be done to prevent it.
>>
>> Mike L"
>>
>> ps heheheh as Mark would say, a quote I came across today in the BJP but
>> PLEASE don't discuss, just think about it :):
>>
>> 1899 BJP: "Brown chromic oxide is first formed which has strong tanning
>> powers, but on longer exposure this was reduced to green chromous oxide
>> which has not such a strong tanning action, and if exposure was still
>> further extended, a neg was obtained instead of a pos" Herr Behrens
>>
>
>
Received on Sat Feb 4 13:31:02 2006