TRANSPARENT INK-JET RECORDING FILMS, COMPOSITIONS, AND METHODS
Transparent ink-jet recording films, compositions, and methods are disclosed. These films exhibit high maximum optical densities and have low haze values. These films are useful for medical imaging.
1 . A method comprising:
forming a first composition comprising gelatin and at least one borate or borate derivative; and
forming a second composition comprising at least one anionic polymer and the first composition.
2 . The method according to claim 1 , further comprising forming a transparent ink jet recording film by a method comprising coating a substrate with the second composition.
3 . The transparent ink-jet recording film prepared according to the method of claim 2 .
4 . The method according to claim 1 , wherein the at least one borate or borate derivative comprises sodium tetraborate decahydrate.
5 . The method according to claim 1 , wherein the at least one anionic polymer comprises sodium polystyrene sulfonate.
6 . The method according to claim 1 , wherein the at least one anionic polymer has a weight average molecular weight greater than about 100,000 g/gmol.
7 . The method according to claim 1 , wherein the at least one second composition has a viscosity less than about 50 cP at 40° C., when measured at a shear rate of 10 sec −1 .
8 . The method according to claim 1 , wherein the at least one second composition is an under-layer coating mix.
9 . A transparent ink-jet recording film comprising at least one under-layer disposed on a substrate, said under-layer comprising gelatin, at least one borate or borate derivative, and at least one anionic polymer with weight average molecular weight greater than about 100,000 g/mol.