Re: Density Base OHP and Stouffer

[Stouffer Industries <info@stouffer.net>]

Hello Michael,

Our film base can vary slightly from emulsion to emulsion batch in a range 
of .04 to .06. Our current batch is consistently .05 optical density (visual 
reading) and .09 UV reading. I don't have any Pictorico OHP to compare but 
at least I can give you our density readings of our step wedges.

Kevin Morris
Stouffer Industries

----- Original Message ----- 
From: "Michael Koch-Schulte" <mkochsch@shaw.ca>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Thursday, November 23, 2006 10:39 PM
Subject: Density Base OHP and Stouffer


> I don't own an actual densitometer. My scanner coupled with VueScan puts
> Pictorico OHP at either LogE of 0.08 or 0.10 and it puts my Stouffer
> tablet's Step 1 (clear base) at between 0.04 and 0.06. Does this sound
> close? Do most people use 0.04 or 0.05 (or something else) when 
> calculating
> the printing time between the two? 0.05 is a bit more convenient because
> it's 1/6 of a stop. The resulting error is rather small but I'm just
> wondering. Thx.
>
>
>
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