Solarization
You can give a cool look to your photographs by solaraizing them while printing. To do so, expose your print as you normally would. When placing the paper in the developer, take it out with tongs as soon as you see the picture appearing on the page. Rush the print over to an enlarger that does not have a negative in the carrier and expose the print to full light for a few seconds. Then place it back in the developer tray and continue the printing process as though it were a regular print.