Following from the discussions after reporting Document IRG/WP/2146 at the Meeting in Sarajevo, 1981, it was decided that 1.) more precise definition was needed of the artificial weathering schedules used in the work - participants to re-check Table 8 and send further details or amendments to Dr Bravery; 2.) a further test employing a wider range of chemicals was necessary using a smaller range of artificial weathering schedules; 3.) a new test should be conducted to the panels during the biological tests. The 1982 programme is based on co-operation offered in Sarajevo for two institutes each to use Atlas (Sadolin and TIC Copenhagen) and Xenotest (BAM and EMPA) equipments, and one institute (PRL) to use the Marr and natural weathering exposure. Imperial College offered to carry out treatments and application of coatings. The chemicals included at the suggestion of participants were: Preventol A4 (PA4 1.0%), Phenyl mercury succinate (PMS 1.0%), Nopcocide N96 (N96 1.5%), Pentachlorophenol (PCP 5.0%), Thiocyanomethyl Thiobenzothiazole (TCMTB 1.0%), and Troysan Polyphase (TRP 1.0%) all applied in 50:50 white spirit: linseed oil which served also as a control.

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