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Designed specifically for use with Rollei ATP1.1 Advanced Technical Pan black and white film, ATP DC is a dedicated two-part liquid concentrate developer. Replacing ATP DC SPUR, this updated formula is designed to deliver a wider tonal range with well-controlled contrast, and also promote an exceptionally high degree of sharpness and resolution. This one-shot formula also has increased stability in both concentrate and working solutions, and is also conducive to a simple developing process with shortened fixing times and no additional specialty chemicals required. Additionally, its low toxicity makeup has no hydroquinone for ease of handling.