Ecopro B&w Paper Dev 32 Oz Ecopro B&w Paper Dev 32 Oz eco•pro Paper Developer is a liquid concentrate print developer designed to maximize the paper's natural image property with rich blacks and clear whites. eco•pro Paper Developer is an ideal general purpose print developer suitable for use with warmtone, neutral and coldtone fiber-based and resin-coated papers, and is further optimized to produce the maximum effect when used in conjunction with print toners. With most papers, prints developed with eco•pro Paper Developer will offer the widest range of tone (hue) shift when toned with toners such as selenium, sepia and brown (polysulfide). This is an avid toner's choice, producing creative effects while maintaining rich shadow density. Dilute 1+9 for most applications, or 1+14 when greater control or economy is important.