7. Pruszynski, P., Fine Tuning Opportunities in Wood Extractives Control, Pulp and Paper International (PPI), April 2011 8. Dechandt, A., Watkins, T., and Pruszynski, P., Total approach to deposit control on newsprint machine using TMP and DIP pulp mix - from specialized fixation of individual pulps to retention. APPITA Journal, 57(1), 13-18 (2004) 9. Richardson, D., Waller, N., Parsons, T., Stallard, J., Young, M., Watkins, T., Dechandt, A. Optimization of neutral papermaking wet end chemistry for pitch free newsprint manufacture, APPITA 57th Annual Conference Proceedings, 219-226 (2003). 10. Pruszynski P, LeRoux, R., Pruszynski, P., Armstrong, J., Lin, J., Polverari, M. and Angelac, A-P., Stickies Control in Newsprint Applications – Review, Mechanisms and Novel Approach Pulp and Paper Canada, 98(9), 54-58 (1997) 11. Maher, L.E., Stack, K.R., McLean D.S. and Richardson, D.E., Adsorption behavior of cationic fixatives and their effect on pitch deposition, APPITA Journal, 60(2), 112-119 (2007) 12. Pruszynski, P. Impact of High Yield Pulps on Wet End Chemistry of Typical Fine Paper Applications - Understanding and Alternative Corrective Strategies, International Mechanical Pulping Conference, Xi’an China, June 2011 13. Pruszynski, P. Understanding and controlling wet-end chemistry related to HYP to fine papers, PAPTAC Annual Meeting, Montreal, February 2012 REFERENCES 1. Allen L.H – Pitch in Wood Pulps, Pulp Paper Can. 76(5), T139-T146(1975) 2. Hannuksela, T. and Holmbom, Stabilization of wood-resin emulsions by dissolved Galactoglucomannans and Galactomannans, J.Pulp Paper Sc., 30(6), 159(2004) 3. Sundberg, A., Strand, A., Vähäsalo, L., Holmbom, B. Phase distribution of resin and fatty acids in colloidal wood pitch emulsions at different pH-levels, J. Disp. Sci. Technol. 30(6), 912-919(2009). 4. Xu, L., Pruszynski, P. and Hart.P Effect of conductivity on paper and board machine performance, a review and new experiences, TAPPI J., 16(10), 567(2017). 5. Venditti, R. A., Lucas, B. E., Huo, X., Jameel, H. and Chang H. M., Paper Recycling Factors Affecting the Screening of Pressure Sensitive Adhesives, Recent Advances in Paper Recycling – Stickies, Chapter 5, Doshi & Associates, Appleton WI, 2002. 6. Vähäsalo, L., White Pitch Deposition in 2006, 6th International Paper and Coating Chemistry Symposium 2006, Stockholm, Sweden increase of 3.7%, worth some US$ 4.8million per year. Deposition on the wet end drainage elements was practically eliminated. A 20% reduction in moisture profile two sigma was also recorded, indicating better formation and allowing for better drying. COATED BOARD SWK WITH 15% RECYCLED FIBRE Application for stickies control: The observed improvement in forming table dewatering, reduced deposition and increased decker performance, allowed the mill to increase recycled content by an average of 50% for all grades whilst simultaneously increasing annual production by 7,000 tonnes. CONCLUSIONS Second generation HYBRID coagulants represent a significant expansion in available deposit control additives. Supported by the implementation of best practices that have been developed during the most recent research into deposit control, this new chemistry consistently delivers a cleaner and more efficient operation, not to mention many auxiliary benefits. A blend of mechanisms contributing to the performance of HYBRID makes them very effective, versatile, and suitable for treating a wide gamut of different hydrophobic materials, despite the differences in their chemistry and morphology. HYBRID polymers are less sensitive to various water chemistry conditions and can be used with anything from clean fine paper to highly contaminated, bleached mechanical grades and recycled board. On the other hand, HYBRID polymers, due to their lower charge, impose less stress on the charge level and performance of other additives such as optical brighteners. The polishing treatment – a part of the best practice application – creates an opportunity for improving the performance of sizing and strength additives. In addition to deposit control applications, HYBRID polymers can be used as retention additives. this new chemistry consistently delivers a cleaner and more efficient operation WORLD PULP&PAPER 99