UV testing machine is made in accordance with ASTM D1148,it can provide the simulative heat of the sun and ultraviolet radiation environment of space.It is used for observing the anti-yellowing degree of the sample after a period of time effected by the ultraviolet ray and the temperature. Grey stain can be used for reference standard, to judge it's yellowing degree.Products will change their color when radiated by the sun or influenced by the environment of the container. Use the UV lamp 300W, so that the experiment can be finished in a short time.The machine can also be used as an aging tester or an oven, presenting a muti-function machine.