As noted above, net sales for 2012 increased in comparison to 2011 primarily due to the acquisition of Terphane. Higher net sales from the acquisition of Terphane were primarily offset by lower volumes in the other product lines of approximately $18.7 million, the unfavorable change in the U.S. dollar value of currencies for operations outside the U.S. of approximately $10.1 million and a decrease in average selling prices of approximately $4.6 million. Lower net sales volumes are primarily related to lower volumes for personal care and polyethylene overwrap films, partially offset by improved performance in surface protection materials in the fourth quarter of 2012. The decrease in the average selling prices in 2012 compared to 2011 can be primarily attributed to pricing pressures.
The increase in operating profit from ongoing operations in 2012 compared to 2011 is primarily due to the acquisition of Terphane, partially offset by lower volumes and compressed margins for personal care materials and the unfavorable impact of the change in the U.S. dollar value of currencies outside the U.S. Excluding the impact of the acquisition of Terphane, lower volumes in Film Products had an unfavorable impact of approximately $4.8 million in 2012 compared to 2011. Lower volumes in personal care films were partially mitigated by higher sales volumes for surface protection materials. The change in the U.S. dollar value of currencies for operations outside the U.S. had an unfavorable impact of approximately $1.4 million in 2012 compared to 2011. The estimated impact on operating profit from ongoing operations of the quarterly lag in the pass-through of average resin costs was approximately a negative $0.5 million in 2012 compared to a negative $0.8 million in 2011.
Effective January 1, 2012, the operations of Bright View Technologies Corporation (“Bright View”) were incorporated into Film Products to leverage research and development efforts and accelerate new product development. Prior year balances for Bright View have been reclassified to Film Products to conform with the current year presentation. Operating losses for Bright View in 2012 were $3.8 million, which were consistent with 2011.