From
George Sparkes (Area 22)
There
has been some discussion lately between members of
Area
22 on the use of the above three bath kit, some members doubting the
quality which can be obtained. I have been sent photocopies of pages
from magazines by Reg Ricketts and Neil Souch ARPS on the use of this_
kit.
The
Paterson Photax Group have been manufacturing this product for eight
months and they estimate that over 850,000 films have been processed in
this chemistry. The kits range from 600ml to 15 litres, I the latter
being used by professionals, where there has been enthusiastic
acceptance.
A
Provia film was exposed under controlled studio lighting and was then
cut in half. One half was processed in the Chrome-Six 3+ kit and the
other in standard 7-bath chemistry. The films were then subjected to
very comprehensive tests involving control strips and a densitometer and
the readings fed into a computer. The D-Max and overall density was
identical in the two processes, confirming that Chrome-Six 3+ equals the
quality of the full commercial 7-bath process. Manual processing
machines or hand tanks can achieve equal results but it is essential that that the
instructions supplied with the
kit are firmly adhered to.
RA4
PRINTING COMMENT
By
Bill Broadhurst (Area 9)
Some
comments on the RA4 formula suggested by Brian Asquith in January 93 and
which I have used with satisfaction ever
since, in fact too often leading o family request for reprint of
lab pictures. "We will get Bill to do a decent one of this for
us".
To
re-cap the formula.
Glycerine
50mls [fifty]
Hydroxylamine
sulphate 1
gram.
Sodium
carbonate
25 grams.
CD4
5 grams.
Firstly, is ha 50ml glycerine a misprint or did I misread i? I used five
no 50 and i works ok. [buy it from your local chemist or steal it from
your wife`s cookery set.
Second.
The keeping properties of this brew are none-existent, about 12 hours I
judge. this does not matter to me, as I mix up 250ml a a time and......
Thirdly, the fantastic
economy. I use a wind the handle Paterson thermo drum and start off with
75ml of developer. The first
print looses 4 or 5 ml. Top up back to the 75 for each subsequent print
and 250ml will process about en 10 x 8 sheets. Having made a suitable
mask three 6 x 4 prints fit on each sheet and so a 24 exp. film at least
is printed with 250ml of developer.