Attributes

Brand	-
Category	Office Equipment, Supplies & Services / Photo Printing Equipment
Origin	-
Brand	Paisen
Model Number	BW61
Chemical Type	Black & White Paper Developer
Formulation Basis	Kodak D72 Equivalent
Physical Form	Concentrated Liquid Solution
Container Volume	1 Liter
Dilution Ratio	1:2 to 1:4 (Stock to Water)
Primary Application	Darkroom Photo Paper Processing
Tone Characteristic	Neutral Black with Warm Options via Dilution
Shelf Life (Unopened)	24 Months

6 reviews

Anonymous

Mar 30, 2026

Rating: 3/5

Works well but strong odor

The chemical works great for developing, but be sure to have good ventilation. The smell is quite potent when mixing the stock solution. Results are professional though.

Anonymous

Mar 28, 2026

Rating: 5/5

Classic results

If you miss the old Kodak days, this is the closest match I have found currently on the market. Deep shadows and crisp highlights every time.

Anonymous

Mar 23, 2026

Rating: 5/5

Reliable and Consistent

I've processed hundreds of 8x10 prints with this batch. The activity remains stable in the working solution for several hours if covered. No fogging issues observed.

Anonymous

Mar 11, 2026

Rating: 4/5

Great value for students

Perfect for my university darkroom class. It's much more affordable than buying pre-mixed gallons, and one liter of concentrate goes a very long way when diluted properly.

Anonymous

Mar 08, 2026

Rating: 5/5

Excellent D72 Alternative

This developer works exactly as expected for a D72 formula. I get consistent neutral blacks on my fiber-based papers. The concentrate mixes easily and the bottle arrived well-sealed.

Anonymous

Mar 01, 2026

Rating: 4/5

Good contrast control

By adjusting the dilution ratio, I can easily shift from normal contrast to slightly softer tones. It handles variable contrast papers very well. Only wish the label had more detailed mixing charts.

5 FAQ

Q: Is this solution compatible with resin-coated (RC) paper?

A: Yes, Paisen BW61 is fully compatible with both Fiber-Based (FB) and Resin-Coated (RC) black and white photographic papers. Development times may vary slightly between the two types.

Q: How many 8x10 prints can I make from one liter of concentrate?

A: Yield varies based on dilution and tray size, but generally, 1 liter of concentrate can produce approximately 2 to 3 gallons of working solution, capable of developing roughly 100-150 standard 8x10 prints before exhaustion.

Q: What is the recommended storage temperature for the concentrate?

A: Store the unopened concentrate in a cool, dark place between 50°F and 70°F (10°C - 21°C). Avoid freezing or exposing the bottle to direct sunlight to maintain chemical stability.

Q: Does this contain hydroquinone?

A: Yes, as a standard D72-type formulation, this developer contains hydroquinone and metol. Please handle with care, wear gloves, and ensure adequate ventilation during use.

Q: Can this be used for developing black and white film negatives?

A: No, this formula (D72 equivalent) is specifically designed for photo paper. Using it on film may result in excessive grain and high fog levels. Please use a dedicated film developer like D-76 or HC-110 for negatives.

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