Adox ADOSTOP ECO P Stopbath with Indicator to Mix 1L

Adox Adostop ECO P Stopbath with Indicator to Mix 1L

A powder concentrate stopbath for black and white film and paper, Adostop ECO P is a citric acid–based alternative to traditional acetic acid formulas. It’s almost odourless, biodegradable, and includes a built-in indicator dye that shifts colour when the solution is exhausted, helping you maintain consistent darkroom results.

Why We Like It

This stopbath is particularly well suited to schools, colleges, and shared darkrooms where air quality and safety matter, thanks to its citric acid base and the absence of hazardous substances. The indicator is a genuine timesaver, giving you clear visual feedback so you know exactly when to refresh your working solution. For fibre-based papers it’s especially important, as skipping a stopbath here can lead to staining or streaking further down the line. If you’re used to the sharp vinegar smell of traditional stop, you’ll find this formula much more pleasant to work with, leaving just a faint citrus note in the air.

Key Features

• Powder concentrate makes up to 1 litres of working solution
• Uses 100% citric acid, free from acetic acid and biocides
• Built-in indicator dye shifts from yellow to blue/green when exhausted
• Biodegradable and almost odourless when mixed
• Capacity of around 3m² per litre of solution

What's in the Box

• 1x Adox Adostop ECO P Stopbath powder to mix 1 litres

Ideal For

• Darkroom users sensitive to chemical odours
• Schools, colleges, and shared community spaces
• Processing fibre-based (baryta) papers without risk of staining
• Film and paper development with clear exhaustion indication