RE: VDB is "Brownprint" process?

I must include that the process needs negatives with much less density
range when compared to Vandyke. Since dmax is step 10 and dmin is step
23 (first paper white step), I guess this means that the process needs
negative with a density range of 1.3 (can print negatives optimized for
silver-gelatine). IIRC, Vandyke needs negatives with a density range
around 1.9 - this is a considerable difference!
 
Regards,
Loris.
 
-----Original Message-----
From: Loris Medici [mailto:mail@loris.medici.name]
Sent: 23 Şubat 2006 Perşembe 13:52
To: 'alt-photo-process-l@sask.usask.ca'
Subject: Re: VDB is "Brownprint" process?

...
 
In short:
 
1) It's not true that the process is a DOP. I got a very strong
print-out.
2) Exposure time is very short: If my calculations are correct, with my
setup, 45 secs. exposure will be enough to reach dmax!!! (Since steps 1
- 10 were dmax with 6 mins. exposure, 1/3 x 9 = 3 -> 2^3 = 8, 6 / 8 =
0.75 -> 45 secs would be still enough for step 1 reaching dmax - please
correct me if I'm wrong here!) This is very fast when compared to my 8
mins. Vandyke standart printing time (for double coated paper) with the
same lightsource and frame.
3) Density is weak compared to single coated Vandyke (will try double
coating this evening).
4) Color is different compared to Vandyke; it's less red, a milky-brown.
Vandykes are reddish brown.
 
...
Received on Thu Feb 23 06:04:04 2006