This invention relates to an improved bleaching process for bleaching pulp comprising at least one bleaching stage which comprises treating a hardwood pulp with a bleaching agent comprising ClO2 in the presence of a weak base such as, for example, Mg2 preferably at pH from about 3. At least one rod and at least one engaging structure to provide a rigid positioning of the at least one synthetic jet with respect to the at least one rod. An open large diameter end of the structure is axially coextensive and coaxial with an expanded diameter conduit portion. The link node of the last buffer register points to the second buffer register. The host unit may maintain independent linkages with multiple printers or the like, with a switch on the host unit selecting the desired printer.