Revealing Fingerprints With Silver Nitrate

Revealing Fingerprints With Silver Nitrate

Another Method from the same chemistry book.

Weigh 0.3 grams of AgNO3.

IMG_20140101_080537

And pour it into 10ml of distilled water.

IMG_20140101_080629

I sprayed it and I shone it with an LED lamp (a UV lamp is better).

IMG_20140101_080832

Now I got this:

IMG_20140101_234810

I didn’t know why it was a line like that, but it worked.

IMG_20140101_234852

I didn’t find any other fingerprints and the fingerprint that I have is hard to see.

Well, this experiment is considered as a fail. I rather use the iodine fuming method that I used the last time. The silver nitrate reacts to the salt on the fingerprint and produces silver chloride, just like on the skin.

 

Categories: Chemistry

13 Comments »

What's your Opinion?

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s