Re: AmerGraph ULF-28

Traditionally Pulsed Xenon has been used to expose graphic art films
including ortho... I could easily be wrong but I was not aware that they
needed a special filter to expose these materials..........

John Cremati .

----- Original Message -----
From: "Sandy King" <sanking@clemson.edu>
To: <alt-photo-process-l@usask.ca>
Sent: Friday, June 02, 2006 10:23 AM
Subject: RE: AmerGraph ULF-28

Don,

I have been told that the base cost will be
approximately $1900 if purchased directly from
Amer-Graph.

There is also the possibility that the unit will
have accessories that allow printing of silver
papers. There is a filter slot about 19.5" X
21/5" between the lamp and the glass that will
allow the use of light attenuators and filters.
In theory this should allow the use of ND,
anti-actinic, and VC filters so that this unit
could be a multi-purpose light for printing with
both alternative processes and silver as well. I
think the silver option may be attractive since
there are many people who want to scan their
negatives and make digital negatives for contact
printing.

Sandy

>So Sandy, what is the expected expense of such a unit?
>
>Don Bryant
>
>
>-----Original Message-----
>From: Sandy King [mailto:sanking@clemson.edu]
>Sent: Friday, June 02, 2006 10:01 AM
>To: alt-photo-process-l@usask.ca
>Subject: RE: AmerGraph ULF-28
>
>
>Marek,
>
>It is a kind of HID lamp, like the metal halide,
>but there are some significant advantages. Unlike
>metal halide lamps, which may take several
>minutes to reach full radiation, CWX gives full
>output almost immediately. And, the lamp will
>strike immediately after shut-down, unlike MH
>lamps, which usually must cool down before they
>will re-strike.
>
>The SPD curve of varies according to Dose, as you
>have the choice of Gallium, Mercury, Iron,
>Thallium, Lead, or Indium, all with radiation
>spikes at different points on the SPD chart. I
>have been working with the Mercury Dos, which is
>fairly similar to the SPD of BL tubes, with a
>major spike at 365 nm, but also has a spike
>almost as high at 435 nm which is responsible I
>believe for the very high printing speed of the
>ULF-28.
>
>People who know palladium printing should be able
>to look at the data I provided and get a
>reasonably good idea of the printing speed of
>this unit compared to their own. The ULF-28 is
>without question the fastest printing light I
>have ever used, and I have tested a number of
>different light sources, including a number of
>HID lamps, the NuArc 261k and 261ks, as well as
>fluorescent banks using AQUA, BL, BLB, and SA
>tubes.
>
>Sandy
>
>
>
>
>>Sandy,
>>What is a continuous wave xenon? And congrats on
>>your new full time job (photography?)
>>
>>Marek, Houston
>>
>>>From: Sandy King <sanking@clemson.edu>
>>>Reply-To: alt-photo-process-l@usask.ca
>>>To: alt-photo-process-l@usask.ca
>>>Subject: AmerGraph ULF-28
>>>Date: Thu, 01 Jun 2006 15:27:52 -0400
>>>
>>>
>>>This is a brief update on my experience with
>>>the Amer-Graph ULF-28 printing unit. For those
>>>who may not have seen my first message about
>>>this unit, it is a Continuos Wave Xenon plate
>>>maker, similar in size and configuration to the
>>>NuArc 261k and 261ks. This is a prototype unit
>>>which was sent to me by Amer-Graph for testing
>>>purposes.
>>>
>>>Over the past several weeks I have tested the
>>>ULF-28 with several printing processes,
>>>including palladium, cyanotype, palladium and
>>>carbon, comparing the results with my bank of
>>>BL fluorescent tubes. Papers used were
>>>Stonhenge and COT 320. With every process, when
>>>using the same paper, the ULF-28 prints a full
>>>1.5 stops faster than the BL bank.
>>>
>>>For example, take the following situation.
>>>
>>>1. Pure palladium on COT 320.
>>>2. Double Coating, using 2 ml of a 1:1 mixture
>>>of 15% palladium chloride and 25% ferric
>>>oxalate for both coatings. Short blast with
>>>hair dryer after both coatings to keep the
>>>solution on the surface.
>>>3. Dry for 15 minutes, with air from fan.
>>>4. Exposure with a Stouffer TP 4X5 step wedge
>>>5. Development in a 25% solution of potassium
>>>oxalate, with 2ml of a 5% solution of potassium
>>>dichromate added per liter of developer for
>>>contrast control.
>>>6. Workroom at 72ºF, RH 52%.
>>>
>>>Best exposure for the ULF-28, as judged by the
>>>first maximum density that merges with the next
>>>one, was 50 units, where one unit = 1.3
>>>seconds, for a total time of 65 seconds.
>>>
>>>Best exposure for the BL bank, similar
> >>evaluation, was 200 units, where one unit =
>>>.98 seconds, for total time of 196 seconds.
>>>
>>>The ES of palladium, as processed above, was 12
>>>steps (of log .15 each) from maximum density to
>>>paper white, or about 1.80.
>>>
>>>I will be doing a full review of this unit for
>>>publication later this summer. Hoped to have it
>>>done by now but have been delayed due to
>>>complications from eye surgery.
>>>
>>>Sandy
Received on 06/02/06-09:36:26 AM Z