Presto Stantest Private Limited manufactures Microprocessor Based Accelerated Xenon Arc Tester, XENO ULTIMO- 000. Presto Stantest Private Limited is an ISO 9001:2000 certified company that manufactures products for industrial measuring applications. The Microprocessor Based Accelerated Xenon Arc Tester is used to determine the colorfastness of textiles against sunlight. It is available in various models like BS 1610, BSEN 1002-3, ASTM E-4 and DIN 5122/1.