Ilford 1769771 User Manual

  

The above values are representative of those 

obtained when dish/tray or machine processing 

the paper to ILFORD recommendations. 

Page 2 of 4 

MULTIGRADE IV RC 

 

 

 

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. 

 

MULTIGRADE IV RC unfiltered has an ISO range 

of R110. 

 

ISO range 
MULTIGRADE IV RC paper and 

MULTIGRADE filters 

 

Filter 00 

0

 

1 2

 

3 4 5

Range (R)  180  160

 

130 110

 

90 60 40

 

 

Density

 

Density

 

The above values are representative of those 

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. 

 

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 0 1 2 3 4 5 

Speed (P)  200 –––––––––-––––– 200 100  100 

 

 

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. 

 

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 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 

1

/

2 

steps, with the lowest filter number 

corresponding to the softest contrast. The exposure 

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. 

 

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.