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world pulppaper 77 after adjustments runnability was reference level and a slight improvement in both gloss smoothness could be detected table 4. Coating formulations to maximize latex replacement or other runnability parameters in this trial. The customer was using HASE- type synthetic thickener for controlling the right Brookfield level for coating colour application. The thickener amount was slightly increased when STABILYS A025 was introduced to the process. STABILYS A025 is cooked with jet cooking and solids content is 35. The first trial with STABILYS EVO was conducted with unchanged machine parameters and using the same amount of thickner. STABILYS EVO was cooked to 40 solids content. Similar paper quality was achieved with positive feedback received concerning the printability. The second trial showed a slight increase in both the viscosity of the coating colour and the blade pressure. Blade thickness and angle were optimised and the amount of thickener was reduced slightly. After adjustments runnability was reference level and a slight improvement in both gloss smoothness could be detected. Longer trials with 100 latex replacement are taking place during 2015. In summary the effect of natural binders can be optimised Improve film forming decrease misting 100 latex replacement. All are possible with the right selection of natural binder. Perhaps now might be the time to act