Great demonstration. Another thing to try: After you've developed a latent print on a non-porous surface, spray it with this solution of gentian violet. Let it set for a few moments and rinse the excess with water. Now you can photograph the print.
Hi sir , please is this pigment really violet like of we see its reflexion by spectroscope we will see the true 400-420 nm light , or its just a mixtur of deep blue with red ? Thabk you
Great demonstration. Another thing to try: After you've developed a latent print on a non-porous surface, spray it with this solution of gentian violet. Let it set for a few moments and rinse the excess with water. Now you can photograph the print.
What is the use adding gentian violet solution to the smear?
Hi sir , please is this pigment really violet like of we see its reflexion by spectroscope we will see the true 400-420 nm light , or its just a mixtur of deep blue with red ? Thabk you
Thanks. Helped me quite q bit for my forensic elective
Great video!
its a wash bottle the tube goes all the way to the bottom of the bottle so you dont have to invert the bottle to squirt it
How to use it
first