May 20, 2011. /Lesprom Network/. Kemira increases price for its paper chemical products in all major markets. The increase, ranging from 5-20% depending on product, will be effective for all deliveries on or after June 1, 2011, as the company said in a press release received by Lesprom Network. While Kemira continues to take actions to minimize the impact of escalating raw material costs, it is necessary to adjust pricing in order to compensate for the energy impact, other raw material costs and increased freight costs, the company said.