FOMA
FOMASPEED
BLACK-AND-WHITE ENLARGEMENT PAPER ON RC BASE
General
FOMASPEED is universal high sensitive black-and-white enlarging paper
on resin coated medium weight paper base. It is made of silver chlorobromide
emulsion with neutral to mildly warm image tone. The paper is noted for
its rich half-tone scale from shiny white to saturated black. Its high
speed makes possible to use larger lens diaphragm values even at enlarging
on large sheet sizes. The emulsion layer containing developing agents enables
rapid machine processing and shortening of the manual developing time to
60-90 s at 20C. Regarding the resin coating on the paper base and the thin
emulsion layer, less absorption and carrying over of the processing solutions
take place. The washing and drying times are significantly reduced.
These results considerably increase the output productivity and save
chemicals and water.
The paper is available in glossy, matt, fine grained lustre surfaces
and contrast range from soft to hard (1 - 4) and wide range of sheet and
roll sizes.
Safelight
The paper can be handled for longer periode under red safelight or
under sodium vapour lamp. Safelight fitted with yellow-green or orange
filters is also suitable. However for standard darkroom illumination Kodak
OC, Osram Duka 50, Agfa G 7, Durst Sanat or Ilford 902 filters can be used.
Exposure
FOMASPEED is suitable for exposure in all types of enlargers and printers
fitted with tungsten or tungsten-halogen lamps or common cold light sources.
Other light sources can be used, but tests to determine the optimum exposure
must be done.
Processing
FOMASPEED is suitable for processing in roller processors as well as
in trays. Various common developers can be used. For neutral image tone
FOMATOL LON, FOMATOL P, NEUTOL LIQUID NE, PQ UNIVERSAL, DEKTOL etc. are
recommended. Developers for multigrade papers can be also used.
Tray Processing :
Process
sequence |
Process bath
|
Time
|
Temperature
C |
| Developer |
FOMATOL LQN 1+7 |
60 - 90 s |
20 |
| Stop bath |
2 % acetic acid |
10 s |
20 |
| Fixer |
FOMAFIX 1+7 |
60 - 90 s |
20 |
|
Acidic fixing bath |
3 min |
20 |
| Wash |
Running water |
2 min
4 min |
above 12
bellow 12 |
Machine processing
Process
sequence |
Process bath
|
Time
|
Temp.
C |
| Developer |
FOMATOL LQN 1+4 |
25 -35 s |
30 |
| Stop bath |
2 % acetic acid |
20 s |
not critical |
| Fixer |
FOMAFIX 1+4 |
25 - 35 s |
30 |
| Wash |
Running water |
60 s |
30 |
Drying: The paper is suitable for hot drying up to 85C.
Image Tones
The silver chlorobromide emulsion of FOMASPEED renders neutral to warm
black image, when developed in standard developers. Image tones can be
varied with use of appropriate developers.
Chemical Toning
Toning processes convert the black image to a different colour. There
are two toning methods, direct and indirect. Direct toning converts the
silver image to a different silver compound in one operation. The indirect
one involves bleaching first. A second solution creates a new image
consisting of a silver compound with a different colour. FOMASPEED is suitable
for both direct and indirect methods. For the standard process the indirect
method is recommended. The sepia tone is very popular. FOMATONER SEPIA
set is useful for this purpose. Tone changes are reached by temperature
controlling of the toning bath:
| temperature (C) |
Image tone |
| bellow 20 |
a lighter, yellow brown |
| 20 - 30 |
a deeper, mildly warm brown |
| above 30 |
a deep, cold brown |
Technical Data
| Grade |
ISO SPEED |
ISO RANGE |
D-max |
| 1 |
400 |
120 |
2,1 |
| 2 |
400 |
100 |
2,1 |
| 3 |
400 |
80 |
2,1 |
| 4 |
400 |
60 |
2,1 |
| 5 |
200 |
50 |
2,1 |
ISO RANGE:
It is term for the greatest exposure latitude at the defined maximum
and minimum density, in which details can be distinguished both in the
shadows and in the highlights. Hard grade papers are suitable for low contrast
negatives with shorter density latitude. Soft grade papers have a greater
ISO range, suitable for copying from hard contrast negatives with great
density latitude.
D-max : The values are valid for glossy
surface. The other surfaces show lower D-max.
Spectral Sensitivity
|
Density Curves
 |
Storage
FOMASPEED is recommended to store in a cool, dry place in its original
packing at temperature bellow 20C and relative humidity between 50 and
60 %. No harmful gases and fumes should penetrate into the storage room.
