In a video conferencing system, digital data representing pixels of a selected scene are stored in a Video accumulator Array Memory cells, each cell having memory with several register structures and having the capability of processing the digital data to facilitate compression of the digital data. The methods include dissolution of ibandronic acid in a solvent such as acetonitrile, DMSO, methanol, or water, and spray drying. The dye set of the present invention has improved heat stability and storage stability when used in thermal bubble ink-jet printers.