Plastisol Ink is a type of Screen Printing Ink that was first used to screen T-Shirts in the 1970's. When you look at Vintage Clothing, it's the ink that cracks and flakes over time as the t-shirt gets washed, stretched out, and worn to too many Def Leppard concerts.
Wandering through thrift shops, vintage clothing stores, and flea markets to gather only the best t-shirt specimens. These t-shirts with aged, worn, and washed cracked ink were then scanned into the computer.
The scanned images have been turned into a collection of textures (bitmaps, JPEGs and Photoshop Brushes) that you can use to make your own t-shirt designs look vintage.
This collection of textures has been named "Plastisol"
Go here to find out more about the Plastisol Collection of Vintage T-Shirt Textures.