Vintage Pentro Plastic by Clint Rydel circa 1950’s
Similar to the grant effect and not sure who invented it first. The effect is a piece of plastic is shown in an open cornered holder. A ribbon is threaded through the three holes in the holder but when the plastic is removed it is shown to be a solid piece of plastic with no holes! The sheet is 8.5x 6 inches.
Out of stock