Re: UV light meter

[Katharine Thayer <kthayer@pacifier.com>]

Yesterday I referred back to an earlier discussion noting that  
there's no great correlation between the UV index (which weights UVB  
wavelengths heavily and is used to measure the risk of sunburn) and  
exposure times for alt photo processes, which depend on UVA  
wavelengths..   But it's not necessary to go back to that discussion  
to see  the lack of correlation between the UV index and exposure  
times;  just consider Paul's observation here that his exposure times  
remain fairly constant as the UV index varies from 4 to 10.

Katharine



On Jun 17, 2009, at 11:29 AM, Paul Viapiano wrote:

> We were talking about exposing in the sun/outdoors, and the  
> possibilities of measuring the UV for that purpose.
>
> However, I found (for me!) that exposure for pure palladium prints  
> hardly changed whether the UV index was 4 or as high as 10-ish, as  
> measured by an online weather station close to me.
>
> Paul
>
>
>
> ----- Original Message ----- From: "dkfreed" <dkfreed@whidbey.net>
> To: <alt-photo-process-l@usask.ca>
> Sent: Wednesday, June 17, 2009 10:34 AM
> Subject: Re: UV light meter
>
>
>
> > Paul, et al
> >
> > What would you be using this UV meter for?
> >
> >
> > On Wed, 17 Jun 2009 08:11:40 -0700, Paul Viapiano  
> > <viapiano@pacbell.net>
> > wrote:
> >
> > > Hi all...
> > > We were talking about a device like this a few months ago, and  
> > > happened
> > to find this just now.
> >
> > >
> > http://www.reliabilitydirectstore.com/Reliability-Direct-MS-98- 
> > Ultra-Violet-Detector-p/rdi-ms98.htm
> >
> > > Paul