Paper strength improvement using metal chelates and synthetic cationic polymers

A method for manufacturing paper with improved strength, comprising steps of:

• providing a thick stock, being a cellulosic fiber suspension having a consistency of above 20 g/l;
• diluting the thick stock with white water or other circulating water into a thin stock;
• delivering the thin stock to a headbox;
• draining the thin stock on a moving screen to form a wet web;
• pressing and drying the wet web in a press section and a dryer section to form a dry sheet;
• wherein
• the method further comprises:
• adding a metal chelate and at least one synthetic cationic polymer to the thick stock, the thin stock, the wet web, or any combination thereof.