For impression materials you might want to try a couple of the company web sites that produce the products, such as:
<a href="http://www.jeneric.com" target="_blank">www.jeneric.com</a>
<a href="http://www.kerr.com" target="_blank">www.kerr.com</a>
<a href="http://www.discusdental.com" target="_blank">www.discusdental.com</a>
and then look for impression materials
A good way to visualize how the putty and light body interact, is that the putty starts off as 2 seperate containers, one with a catalyst putty, and one with a base putty, they are mixed together to form the impression putty (commonly referred to as heavy body) which is loaded into the impression tray. The light body (commonly called a wash) is dispensed through a mixing syringe and placed around the prepared tooth. The impression tray with the putty is then seated over the tooth/teeth covered with the light body, and a few minutes later the impression is removed from the mouth and complete. Commonly today, a 2 component putty system is used less and less over an easier to mix and use syringe delivered heavy body system. To explain this a little simplier, in my office when I'm ready to take an impression, my assistant syringes the heavy body material into the impression tray while I'm syringing the light body impression material around the tooth (total time for both of us to do this is about 20 seconds). My assistant then hands the tray loaded with heavy body to me and I insert the impression tray into my patient's mouth.
For dental stones, that's an even easier one to visualize. The stone is a simple powder and water mixture. A certain volume of liquid per mass of stone powder is mixed together to get the semi-liquid stone for which to pour into the impression.
try <a href="http://www.dentsply.com" target="_blank">www.dentsply.com</a> and look for dental stones and they may have some pictures.
