There is no more graded RA-4 paper on the market. All paper is probably intended for digital printing anyway. This creates problems like color crossover for optical printing. However, it is still possible to make amazing prints with an enlarger in 2025.

The lack of graded paper, however, means that contrast is not a thing you can control by simply using a paper that react differently to light.

The manipulation of contrast on the image must be done chemically.

This is the color head of my enlarger, it can be used for contrast control of black and white print too, but this is not the intended use.

These informations should match the ones for Meopta Color 4 too, they use the same exact color filters.

Filtering wheels

The head has the following subtractive filters intended for print color correction

• C: Cyan
• M: Magenta
• Y: Yellow
• D: Neutral Density

Contrast control with black and white using ILFORD Multigrade

As a guideline, ILFORD’s Technical Information Contrast Control memo for has provide as a guideline the following conversion table between Multigrade filters and Meopta color filtering values.

These are just a relatively sparse list of developers I have used for black and white film.

Rodinal (from Labo-Argentique)

High acutance, my mainly used so far, generally at 1+25 to 1+50. Reveal grain as it is.

Used 2 times to do semi-stand at 1+100, agitate 1 minute, stand 30 minutes, 4 inversions, then 30 minutes of stand again.

When developing Ilford Delta 3200, it is better to push development time one extra stop when using the time form Massive Dev chart to get a more contrasted/denser negative that is easier to scan.