A color selection electrode and a method of producing the same, for a high definition cathode ray tube with a finer pitch of mask apertures free from limitations due to the thickness of the iron-alloy plate of the mask. The multi-connection protocol comprises a first connection and a second connection, which may be used respectively for control communications and data communications. The first differential-to-single-ended converter receives an incoming differential current pair to be converted into a first single-ended voltage signal. The first network informs a second of the networks on the extent the shared spectrum is occupied, for the second network to be free to use the shared spectrum outside the occupied part. The method is suitable for measuring of Fries products in samples ranging in size from small scale combinatorial formats to production scale reactors. The aqueous medium consists of water and a water-soluble organic compound containing at least one alkanediol and has a surface tension of from 40 mNm or more to less than 60 mNm in an environment of temperature 25\xb0 C.