You need transparencies specifically for ink jet, if that is what you are using. Cheap ones may still have a pretty coarse graininess to them.
If you can find the transparency film by Pictorico (made in Japan, Pictorico Premium OHP Transparency Film), you will notice that the texture is very different. I believe they have a microcrystalline inorganic coating -- of course details are lacking. With a pretty strong magnifier, I cannot see any beading up or cracking (HP ink). Others have reported using Vellum, if it is still available, and regular tracing paper. I have no experience with either of those media.
John
If you can find the transparency film by Pictorico (made in Japan, Pictorico Premium OHP Transparency Film), you will notice that the texture is very different. I believe they have a microcrystalline inorganic coating -- of course details are lacking. With a pretty strong magnifier, I cannot see any beading up or cracking (HP ink). Others have reported using Vellum, if it is still available, and regular tracing paper. I have no experience with either of those media.
John