254nm shortwave UV lamp for fluorescence inspection

254nm shortwave UV lamp for fluorescence inspection Description

For best results, use in a dimly lit room against a dark background. This handheld, portable model requires 4 AA batteries. Shortwave lamp. This shortwave lamp clearly shows phosphors and phosphor afterglow on British postage stamps (GB stamps) up to 1992. For best results, use a shortwave lamp in a dark room, the darker the room the better. To see the different colored phosphors on the 1960 Wildings issue, look for the phosphor afterglow when you turn off the UV light. Green phosphor is the strongest (10 second afterglow) followed by Blue (15 seconds). Violet has a very short afterglow (5 seconds). It will be difficult to see the afterglow in daylight, the darker the room the better. This handheld, portable model requires 4 AA batteries (not included). Package includes: 1 x 254nm Shortwave UV Lamp