Amaloco S 10 Reukloos Signaal S/B 1l

Amaloco S 10 Reukloos Signaal S/B 1l: Stop development in the darkroom

A controlled stop between developer and the next bath is part of consistent black-and-white printing and film processing. Amaloco S 10 Reukloos Signaal S/B 1l is a 1-litre, odourless stop bath based on citric acid, with a colour indicator that shows when the working solution is exhausted. Its use also extends to colour processing, including RA-4 work in trays or tank processors, so it has a place in more than one darkroom workflow. For black-and-white work, the stated stop time is 0.5–1 minute at a 1+19 dilution. The indicator gives this bath a useful point of difference: the solution starts yellow and turns blue as it reaches exhaustion, making its condition visible rather than leaving you to judge it by appearance alone. Amaloco lists a coverage rate of 1–2 m² of material per litre of working solution. That gives you the key figures to plan a batch, while the odourless formulation is a welcome detail in a room where several processing baths may be in use. It’s a purpose-made darkroom chemical for photographers working with black-and-white or colour processes.

Darkroom Features

• Citric-acid stop bath: This is a stop bath based on citric acid, intended for use between development and the following processing bath. It provides a defined stop-bath option for black-and-white darkroom work, as well as the colour applications listed for S 10.
• Odourless formulation: The product is described as odourless, a relevant detail in a working darkroom where chemical solutions are used in sequence. The formulation keeps the emphasis on the processing task rather than a noticeable stop-bath smell.
• Visible exhaustion signal: The indicator changes the solution from yellow to blue as the bath becomes exhausted. That colour shift offers a direct visual cue about the solution’s condition; once it has turned blue, the bath needs replacing.
• Black-and-white processing: Amaloco S 10 is suitable for all black-and-white processes. This makes it applicable across black-and-white film and print workflows, rather than being restricted to a single process type.
• RA-4 and colour processing: The stop bath is also suitable for colour processes, including RA-4 processing in trays or tank processors. That stated compatibility gives colour darkroom workers a clear use for the same product alongside its black-and-white applications.
• Stated black-and-white stop time: At a dilution of 1+19, the stated stop time is 0.5–1 minute. This specific timing reference is useful when setting up the stop-bath stage of a black-and-white process.
• Coverage rate: Amaloco gives a dosage rate of 1–2 m² of material per litre of working solution. This figure helps estimate how much material a prepared solution is intended to process.

What's Included

• Amaloco S 10 Reukloos Signaal S/B 1l

Technical Specifications

• Brand: Amaloco
• Model: S 10 Reukloos Signaal S/B
• Type: Odourless indicator stop bath
• Pack size: 1 litre
• Base: Citric acid
• Indicator: Yellow to blue colour change as the bath is exhausted
• Black-and-white dilution: 1+19
• Black-and-white stop time: 0.5–1 minute
• Applications: Black-and-white and colour processing, including RA-4 in trays or tank processors
• Dosage: 1–2 m² of material per litre of working solution