Справочник Пользователя для Ilford Multigrade IV RC Deluxe 44M 1771758
Модели
1771758
MULTIGRADE IV RC
Page 2 of 4
Contrast range
Seven full grades of contrast, in half grade steps,
are available on MULTIGRADE IV RC paper when
used with the ILFORD MULTIGRADE
speed-matched filters.
Seven full grades of contrast, in half grade steps,
are available on MULTIGRADE IV RC paper when
used with the ILFORD MULTIGRADE
speed-matched filters.
The chart gives the ISO range figures (ISO
standard 6846 – 1992) for MULTIGRADE IV RC.
These figures give a guide to selecting the
appropriate grade of paper for a given effective
negative density range.
standard 6846 – 1992) for MULTIGRADE IV RC.
These figures give a guide to selecting the
appropriate grade of paper for a given effective
negative density range.
MULTIGRADE IV RC unfiltered has an ISO range
of R110.
of R110.
ISO range
MULTIGRADE IV RC paper and
MULTIGRADE filters
Filter 00
MULTIGRADE IV RC paper and
MULTIGRADE filters
Filter 00
0 1 2 3 4 5
Range (R) 180 160 130 110 90
60
40
The above values are representative of those
obtained when dish/tray or machine processing
the paper to ILFORD recommendations.
obtained when dish/tray or machine processing
the paper to ILFORD recommendations.
ISO range figures may be helpful to printers who
have some means of measuring the effective
density range of the image as projected on the
enlarger baseboard – such as with a photometer.
As an example, for a negative with an effective
density range of 1.32 log exposure units, multiply
this figure by 100 and choose the nearest ISO
range figure from the table – in this case 130. Try
printing this negative with MULTIGRADE filter 1 on
MULTIGRADE IV RC paper.
have some means of measuring the effective
density range of the image as projected on the
enlarger baseboard – such as with a photometer.
As an example, for a negative with an effective
density range of 1.32 log exposure units, multiply
this figure by 100 and choose the nearest ISO
range figure from the table – in this case 130. Try
printing this negative with MULTIGRADE filter 1 on
MULTIGRADE IV RC paper.
ISO speed
The speed of MULTIGRADE IV RC depends on the
filtration used during exposure. MULTIGRADE IV
RC unfiltered, has a paper speed of ISO P500.
The speed of MULTIGRADE IV RC depends on the
filtration used during exposure. MULTIGRADE IV
RC unfiltered, has a paper speed of ISO P500.
ISO paper speed
MULTIGRADE IV RC paper and
MULTIGRADE filters
Filter 00
MULTIGRADE IV RC paper and
MULTIGRADE filters
Filter 00
0 1 2 3 4 5
Speed (P) 200 –––––––––-––––– 200 100 100
The above values are representative of those
obtained when dish/tray or machine processing
the paper to ILFORD recommendations.
obtained when dish/tray or machine processing
the paper to ILFORD recommendations.
Exposing light sources
MULTIGRADE IV RC is designed for use with most
enlargers and printers, that is, those fitted with
either a tungsten or tungsten halogen light source.
It is also suitable for use with cold cathode (cold
light) light sources designed for variable contrast
papers. Other cold cathode (cold light) and pulsed
xenon light sources may give a reduced contrast
range.
MULTIGRADE IV RC is designed for use with most
enlargers and printers, that is, those fitted with
either a tungsten or tungsten halogen light source.
It is also suitable for use with cold cathode (cold
light) light sources designed for variable contrast
papers. Other cold cathode (cold light) and pulsed
xenon light sources may give a reduced contrast
range.
Latent image stability
No significant change in picture quality will be
seen when MULTIGRADE IV RC is left for a period
of 24 hours after exposure and before processing.
No significant change in picture quality will be
seen when MULTIGRADE IV RC is left for a period
of 24 hours after exposure and before processing.
Contrast control
Contrast is controlled by using MULTIGRADE hand
filters, the new MULTIGRADE 600 equipment,
other MULTIGRADE equipment, variable contrast
enlarger heads or colour enlarger heads.
Contrast is controlled by using MULTIGRADE hand
filters, the new MULTIGRADE 600 equipment,
other MULTIGRADE equipment, variable contrast
enlarger heads or colour enlarger heads.
The twelve MULTIGRADE filters are numbered
00–5 in
00–5 in
1
/
2
steps, with the lowest filter number
corresponding to the softest contrast. The exposure
time for filters 00–3
time for filters 00–3
1
/
2
is the same; that for filters
4–5 is double.
The ILFORD MULTIGRADE 600 professional
exposing system replaces the standard lamphouse
on the most popular professional enlargers.
exposing system replaces the standard lamphouse
on the most popular professional enlargers.
Characteristic curves
Relative log exposure
Relative log exposure
MULTIGRADE IV RC glossy or pearl paper
exposed through filters 00, 0, 1, 2, 3, 4 and 5.
Developer: MULTIGRADE diluted 1+9.
Development: 1 minute at 20ºC/68ºF.
exposed through filters 00, 0, 1, 2, 3, 4 and 5.
Developer: MULTIGRADE diluted 1+9.
Development: 1 minute at 20ºC/68ºF.
Density
Density