[alt-photo] Re: Alternative Exposure Unit (no pun intended)

[gumprint at gmail.com]

Paul,

The unit is 10.5 inches square. With the bulbs it is 8 inches high/deep. The
bulbs are arranged in an 8X8 pattern.

There are 3 ways to use it; center 4 bulbs, perimeter 12 bulbs, or all 16 on
at once connected to a graylab analog timer. I use all 16 at once.

The print is exposed 5" from the top of the bulbs. I leave it attached to
said shelf where there is another below it that the printing frame rests on.

Largest print so far is 8X10.

The unit is used with the bulbs pointing down but with the swivel in the
clamp it could be turned to any position.

I do not leave the unit on between exposures so there is no problem with
heat. This may shorten the life of the bulbs, but without it being housed in
some sort of cupboard, it too bright (equal to 1600 watts) to be around for
long.

I have not tested it with cyanotype or vandyke.

For me the speed of exposure is fantastic in such a light, portable unit.
The bulbs pack back up in the factory box and the unit isn't much larger
than a telephone book. Together they weigh around 5 pounds. You could take
it hiking :-)

Carole

On Thu, Mar 11, 2010 at 5:38 PM, Paul Viapiano <viapiano at pacbell.net> wrote:

> Carole...
>
> What are the dimensions of this unit?
>
> What's the largest print you've printed with it?
>
> How far from the contact frame is the exposure unit?
>
> Sounds great...would love to know more.
>
> Thanks...Paul
>
>
> ----- Original Message ----- From: "Gumprint" <Gumprint at gmail.com>
> To: "The alternative photographic processes mailing list" <
> alt-photo-process-list at lists.altphotolist.org>
> Sent: Thursday, March 11, 2010 1:58 PM
> Subject: [alt-photo] Alternative Exposure Unit (no pun intended)
>
>
>
>  Christine, Group:
>>
>> I had been using a custom made BLB set up with 8-24" bulbs for over 15
>> years. The bulbs are very expensive to replace and my exposures were 90
>> seconds to 7 minutes. Last month Barry Schmetter brought in a Fotodiox
>> unit
>> for me to use for a gumprint demo at the Large Format and Alternative
>> Photography Gathering (Metro Wash DC). Using my gum/pigment mix 1:1 with
>> 15%
>> ammonium dichromate sensitizer I was able to reduce my first emulsion from
>> 7
>> minutes to 70 seconds. It was perfect. The second emulsion was correct in
>> 30
>> seconds. This unit has completely changed the way I print.
>>
>> http://www.fotodiox.com/catalog/product_info.php?products_id=78 fitted it
>> with 16 Bright Effects (swirly type; 26 watts daylight or 6000K from
>> Lowes).
>> The unit is intended to sit on a lighting tripod but I added a clamp and
>> attach it to a heavily loaded bookcase. The unit is currently going for
>> $135
>> + shipping. Add $30 for a clamp if you can't rig up something, a builder
>> pack of the bulbs, and you have a very fast, compact, and portable
>> exposure
>> device.
>>
>> Best,
>> Carole
>>
>>
>>
>> On Thu, Mar 11, 2010 at 4:18 PM, Christina Anderson <zphoto at montana.net
>> >wrote:
>>
>>  Has anyone bought one of these and used for alt or gum?
>>> And what is the best URL for a plan to build one's own?  Apparently the
>>> plan I hand out to students out of Nadeau's is incomplete, but since I am
>>> a
>>> building failure, I can't explain why it is incomplete.  I wouldn't know
>>> a
>>> magnetic ballast from a martini frankly.
>>> Chris
>>>
>>>
>>> http://www.silkscreeningsupplies.com/site/799934/product/RXP2024
>>>
>>> Christina Z. Anderson
>>> christinaZanderson.com
>>>
>>> _______________________________________________
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