Re: Opacity of digital negative substrates, was Re: Gum a la Sam Wang

Judy,

I think that was my post regarding overlapping the Stouffer with a clear
Pictorico strip. Sandy had said that clear Pictorico measured around .15 with
his UV densitometer. I was merely babbling on about how that seemed confirmed
when I used it with the Stouffer to get my base exposures for different mixes
of PT/PD.. This particular Stouffer (T2115) was .15 per step. If you were
to compare the clear step of the Stouffer with clear Pictorico or Base + Fog
on both, they would be around:

Stouffer Log .05
Pictorico Log .15

So, yes, I guess you could say Pictorico is "slower" than the film the
Stouffer is printed on.

By the way, I have started using the Stouffer T3110 instead. It is 3/4" x
8" and has 31 steps, each .10 or 1/3 stop. It is easier to work with,
especially doing the above. It seems to take me more steps to get anywhere anyway.

Mark Nelson

In a message dated 11/27/03 12:11:59 AM, jseigel@panix.com writes:

> And I seem to have lost the message where you wrote that the pictorico
> measured .15 per step on the densitometer...  apparently claiming that
> that meant it was slower than the Stouffer.  But isn't the Stouffer .15
> per step??? You said something about comparing by having them overlap.  I
> couldn't follow that. Would you explain again-- ?
>
Received on Thu Nov 27 02:30:29 2003