Lawter Inc., a Harima Chemicals Group company, is announcing list and off list price increases for its rosin resin product lines effective July 1, 2014.   Tall oil rosin, the primary feedstock for Lawter’s resins, continues to increase in cost significantly. Since July of 2013, the cost of tall oil rosin has increased over 75%. Although the world benchmark for rosin, Chinese gum rosin, has been stable for the past several months, it has increased about 60% since July 2013. The tall oil rosin m...