pellicle may be further dried by exchanging the liquid in the pad for an organic solvent followed by placing the pellicle under pressure in a supercritical carbon dioxide filled chamber once all of the organic solvent has been removed the liquid co 2 temperature is increased so that the co 2 forms a gas that is then released the result is a dried product that can undergo cutting packaging and sterilization the following examples serve to illustrate the present invention it is to be understood that the examples are not restrictive of the present invention this example is directed to a preparation of standard mechanically modified microbial derived cellulose films produced by a xylinum within a controlled environment to minimize bioburden microorganism contamination from a propagation vessel sterilized media was inoculated with a xylinum filled into bioreactor trays and incubated until optimal growth of the pellicle was observed the pellicles were removed from the trays and then underwent caustic chemical processing depyrogenation in a tank for about one hour the pellicles then underwent a continuous rinse with filtered water the films were compressed within a pneumatic press to yield a pellicle having a weight of approximately 4 to 10 g each unit was placed in a pouch sealed sterilized and used for various tests inclusive of cellulose content endotoxin lal and mechanical strength this example is directed to a preparation of standard thermally modified microbial cellulose films per the initial steps of example 1 following chemical processing the films were compressed within a.