Photographic Paper Developer Ilford PQ Universal 1 L (1155082) — liquid concentrate for darkroom paper processing

Ilford PQ Universal Paper Developer is a 1-litre liquid concentrate formulated for darkroom development of black-and-white photographic paper. When diluted according to Ilford's instructions, this developer is suitable for a variety of baryta and resin-coated papers and is compatible with manual tray processing and rotary processors. The formulation aims to offer consistent development activity, predictable tonal rendition and reliable image density across a range of paper grades.

Advantages

The liquid concentrate format simplifies storage and mixing for regular darkroom workflows, reducing preparation time compared with powdered developers. PQ Universal delivers even development and neutral shadow detail, producing stable midtones and highlight control across different paper types. Its chemistry is formulated for reproducibility, making it easier to achieve consistent results from batch to batch and between manual and machine processing.

Suitable for

• Black-and-white darkroom printing on baryta and resin-coated papers
• Manual tray processing in educational, club or studio darkrooms
• Rotary or automated paper processors used in production or professional labs
• Developing test strips and fine-tuning exposure and contrast for prints

Key specifications

• Form: liquid concentrate, 1 litre container
• Application: developer for black-and-white photographic paper
• Compatibility: suitable for a wide range of baryta and resin-coated papers
• Use modes: manual tray processing and rotary/automated processors
• Performance: designed for consistent tonal rendition and repeatable results

How to use

Prepare the working solution by diluting the concentrate according to the manufacturer's dilution and temperature recommendations printed on the product packaging or technical sheet. Mix thoroughly before use and pour the working solution into trays or the processor reservoir. Follow standard darkroom procedures: develop for the recommended time, stop bath, fix, wash and dry. Use agitation or processor settings consistent with the paper manufacturer's guidance to ensure even development and avoid uneven densities or streaking.

Usage recommendations

Always follow safety instructions and wear appropriate gloves and eye protection when handling concentrated chemicals. Store the unopened concentrate in a cool, dark place and discard working solution after its recommended lifetime. For best results, run control strips when changing paper type, dilution or development times to confirm exposure and contrast settings.