Pressure-sensitive　paints　using　poly[1-(trimethylsilyl)-1-propyne]　(PTMSP)　as　a　binder　polymer　are　capable　of　capturing　subtle　pressure　fluctuations　under　low-pressure　conditions,　but　the　pressure　sensitivity　is　unstable.　The　dependence　of　the　pressure　sensitivity　stability　on　environmental　factors　and　coating　parameters　was　evaluated　under　low-pressure　conditions.　The　pressure　sensitivity　decreased　from　56.3　to　42.5%/kPa　at　an　extremely　low　pressure　after　60　min,　and　the　stability　decreased　significantly　as　the　background　pressure　was　reduced.　An　apparent　change　in　the　pressure　sensitivities　and　stability　was　observed　from　278　to　318　K,　with　optimal　performance　being　obtained　at　298　K.　A　comparison　of　the　pressure　sensitivities　and　emission　intensities　of　shaded　and　irradiated　samples　stored　at　low　pressures　indicated　that　the　excitation　light　hardly　aged　the　binders.　The　pressure　sensitivity　stability　decreased　as　the　luminophore　concentration　increased,　while　an　increased　in　the　paint　thickness　improved　both　the　pressure　sensitivity　and　stability.　©　2022