US 6,767,687  Bl  22  21  -continued  iodonium salt selected from:  0  OqN-0-~-0-cn,  0  disulfonates which is  (wherein R is  H,  -CH$_{3 }$ or  -C(CH$_{3}$ ) 3 )  bisarylsulfonyldiazomethane which is  (wherein R is  H,  -CH$_{3 }$ or  -C(CH$_{3}$ ) 3 )  arylcarbonylarylsulfonyldiazomethane which is  wherein R is  H,  -CH$_{3 }$ or  -C(CH$_{3}$h),  and a mixture thereof,  and said acid producing agent is contained in the composi› tion in an amount of 0.1 to 50 wt  %.  * * * * *  N-iminosulfonates selected from: 