Type I bags shall be formed by placing the heat sealable surfaces of two sheets together, or by folding one sheet in half, and then heat sealing seams along the two sides and the bottom edge. The side seams shall be parallel to each other. The bottom seam shall be at right angles to the side seams.
Type II bags shall be fabricated in a manner similar to Type I bags as described in 3.3.1, except that seams shall be cold sealed. The seams shall be a minimum of 1/2 inch wide and shall be effected between two sets of rubber coated pull-wheels or any other system capable of creating seals strong enough.
Each bag shall be marked or printed in capital letters, using 10-point type, with the following information: The specification number and revision letter; type designation; bag manufacturer's name and bag designation; month and year of bag fabrication. Each bag shall contain this printing on at least one surface with the color and position of the printing being optional.