In recent years, with the rapid development of the food, cosmetics, dairy, beverage, pharmaceutical and other industries, our plastic flexible packaging industry, technology and equipment and R & D capability has been greatly developed and improved in many areas of flexible packaging is playing an increasingly important role. Flexible packaging printing is an important part of the entire printing industry, how to improve the quality of flexible packaging printing, is every flexible packaging printing enterprises need to focus on. For surface printing quality testing, stroboscope flexible packaging industry is currently one of the widely used test equipment, the paper stroboscope in flexible packaging production application for detail. 
Stroboscope principle 

     Strobe stroboscope also known, which typically include internal xenon lamp, a high voltage trigger circuit, the frequency adjustment circuit, and the display circuit, the trigger circuit shown in Figure 1. Xenon lamps are filled with xenon gas inside a glass tube and other inert gases, in high-voltage current triggered, continuous discharge lamp emitting between two poles, and its duration is determined by the luminous energy storage capacitor.