2015 Convertible Ultraviolet Fluorescent Lamp/ diamond grading UV lamp used for gem identifying

 Ultraviolet Fluorescent Lamp FUV-4

 Jewelry Fluorescent Lamp

    Approximatly 1/3 of all diamonds have a tendency to fluoresce when exposed to ultra-violet (UV) light. When diamonds are viewed under a UV light-source, they tend to fluoresce as blue or violet-blue. Natural fluorescence can help a off-colored diamond look like it is a higher grade than it actually does, which is why it is important to identify it.

    Ultraviolet (UV) light rays are beyond the spectrum sensitivity of the human eye. Under an artificial ultraviolet light source, many stones fluoresce or give-off light. The intensity and color of the fluorescence will vary with a short or long wavelength of light. This fluorescence is useful in determining the authenticity of stones.

Ultraviolet Lamp with Dual-Wavelength:LW=365m,SW=254m
1. Set up big eyepiece (Proprietary technology)     

2. Drawer observation darkroom:good effect in dark room and easy to put samples

3. Votage:110V / 220V,4W

4. Used to excite fluoresence,present useful information for the test.

5. attention to avoid the influence from ambient light when testing

6. one year warranty ,and life long maintenance.

7. Carton packing

8. Size:24*24*21cm, weiht: 3kg

I. Technology Data

  1. UV light box: Installed the 365nm long-wave light and 254nm shortwave light

  2. Drawer observation darkroom: Big eyepiece, Drawer observation box, non- fluorescent rubber bottom plate

   3. Power Supply: 110V/60HZ

II. How to use FUV-4

  1. Put the clear gem into observation box, and then close it

  2. Plugged in, switched it on

  3. Press the LW button, leave it 2-3seconds later, and turn the LW light on

  4. View the color and the strength of gem under long-wave

  5. Press the SW button, leave it 2-3seconds later, and make the SW light on

  6. View the color and the strength of gem under shortwave

  7. The gem can be also put on the table of observation darkroom.

III. Matters need attentions

1. Make sure to avoid the affect of ambient light when view the gem.
2. If the gem too big, you can take the LW or SW light off to view the gem, but remember to do it in a dark room.
3. Do not look direct to the UV light; pls turn off the electric power after the test.
4. One year quality warranty against deductive after selling, and life-long maintenance.