Re: UV Box Heat Fogging?

Date: 11/23/05-02:54:27 AM Z
Message-id: <>

Does Van Dyke reach a point where there is reciprocity failure with long
Mark Nelson
Precision Digital Negatives

In a message dated 11/23/05 12:07:10 AM, writes:

> What I was trying to do was to see what the limits of a colorized negative
> are in regards to blocking UV. I'm normally printing to VDB around 1.8-1.95
> which takes about six minutes. For my own curiousity I doubled that time,
> and then doubled that again (6, 12, 24 minutes). At 24 minutes things
> weren't looking like what I thought they would. I wondered if heat energy
> was becoming a factor on the emulsion exposure overall. Hence the question,
> does heat fog exist in these situations?
Received on Wed Nov 23 02:54:42 2005

This archive was generated by hypermail 2.1.8 : 12/01/05-02:04:51 PM Z CST