I’m playing about with some shrink plastic for some jewelry and looking on Folksy I see some makers have some lovely shrink plastic jewelry. I see they are also quite thick, compared to my thin pieces. Could someone let me know please how they are getting thick pieces after shrinking? I am guessing the plastic is thicker in the first place but I can’t find any , any help please? Thank you 
hi there - i think it is always the same thickness when you buy it in packs from shops - i have never seen different thicknesses.
The only thing some people use sometimes instead of the standard sheets are plastic boxes (type you keep food in).
I had a discussion with someone on these forums about varnishing/ sealing shrink plastic designs - that would make them thicker than a non varnished piece.
hi - i think it was me who raised the issue but varnishing it doesn’t really make much difference to thickness. Resin would make a difference and gives a domed effect.
I think it may be that people are using plastic boxes etc. instead of shop bought SP.
Hi Kate, I always use Polyshrink Artist’s Grade Shrink Plastic, as it gives consistent results. The thickness is always uniform, about 1 to 1.5mm thick when shrunk. I think all of the brands of shrink plastic are similar thickness.
I think that some of the shrink plastic items look thicker, due to close-up photos.