<P> The base material consists of thin , flexible polystyrene plastic ( # 6 ) sheets . Prior to heating , the plastic sheets can be colored with felt - tip pens , acrylic paint , colored pencils , etc. and cut into shapes . However , oily or waxy substances ( such as cheap colored pencils , crayons , or oil paint ) are not suitable because they melt or burn in high heat . When heated with the Easy - Bake Oven , a conventional oven , or a heat gun , the plastic shrinks by about five - eighths and becomes thicker and more rigid , while retaining the colored design . </P>
<P> The base material consists of thin , flexible polystyrene plastic ( # 6 ) sheets . Prior to heating , the plastic sheets can be colored with felt - tip pens , acrylic paint , colored pencils , etc. and cut into shapes . However , oily or waxy substances ( such as cheap colored pencils , crayons , or oil paint ) are not suitable because they melt or burn in high heat . When heated with the Easy - Bake Oven , a conventional oven , or a heat gun , the plastic shrinks by about five - eighths and becomes thicker and more rigid , while retaining the colored design . </P>
what kind of plastic are shrinky-dinks made of
what kind of plastic are shrinky-dinks made of
thin , flexible polystyrene plastic ( # 6 ) sheets
thin , flexible polystyrene plastic ( # 6 ) sheets