The overseas customers can contact Landglass or local service centers:
Former Soviet Union Areas:serg@eastglass.ru
Southeast Asia:seekksin@singnet.com.sg
Europe:freyhermann@aol.com
freyhermann@t-online.de
Iran:hassan_malekafzali@yahoo.com
U.S.A. & Canada: info@igesolutions.com

Please note: before the service engineer gives solution, he may need to know:
1. the model of your furnace;
2. at what conditions the problems happen and the detail description of the problems;
3. if the quality of the end products is concerned, please describe the quality problems in  details, for example: the location of the white haze, how the glass bent, etc; meanwhile, please provide the tempering parameters during tempering.