[alt-photo] Re: NuArc UV units question

[Paul Viapiano]

Thanks, Mark...

That basically what I meant.

I know there's a big tendency here for people to say "Do your own homework" 
and usually rightfully so, but when troubleshooting a machine sometimes 
another's experience helps point one in the right direction.

I also know that many variables (paper, humidity, etc) can alter exposure 
times/units as well, but you usually won't see differences in factors of 
five or ten...

Paul


----- Original Message ----- 
From: <ender100 at aol.com>
To: <alt-photo-process-list at lists.altphotolist.org>
Sent: Monday, April 12, 2010 12:37 PM
Subject: [alt-photo] Re: NuArc UV units question


> Jeremy,
>
>
> Actually it's a good question and not pedantic.  Since as you say, NUARC 
> units vary between two machines, two ways to get some sense of what a 
> "unit" is between the two machines is to:
>
>
> 1.  expose a known contrast mix of PT/PD with a step tablet for a given 
> number of units on both machines and compare number of step
>
>
> or
>
>
> 2.  Compare how many units it takes on each machine to properly expose a 
> given contrast mix of PT/PD.
>
>
>>From there you can compare the output of the two machines.  Standard Step 
>>Tablets are great tools!
>
>
> Mark Nelson
> www.PrecisionDigitalNegatives.com upadated home page
>
>
>
>
>
> -----Original Message-----
> From: Jeremy Moore <jeremydmoore at gmail.com>
> To: The alternative photographic processes mailing list 
> <alt-photo-process-list at lists.altphotolist.org>
> Sent: Mon, Apr 12, 2010 2:22 pm
> Subject: [alt-photo] Re: NuArc UV units question
>
>
> Would it make a difference if I said 15 units, 45 units, 125 units, 250
> units? Without a quantification of the amount of light against a known
> standard--which there isn't with the NuArc "unit"--your question strikes 
> me
> as pedantic.
>
> I use 45 units.
>
> -Jeremy-
>
> On Sat, Apr 10, 2010 at 10:48 AM, Paul Viapiano 
> <viapiano at pacbell.net>wrote:
>
>> OK, Jeremy...just curious here. How many units do you use to expose
>> palladium with a new-ish bulb?
>>
>> p
>>
>>
>>
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