stop working with retarder

i was told to use drain cleaner as a retarder also but found all it did was bleach the surface. though this could be another way to trancfer the images on to the concrete i do not know if i will take this on to the next leval. Having had more experiments now I feel as if I have spent far to long on the concert retarders and feel this will take far longer to perfect. At this stage I am calling time on the retarders.
i will now focus on the shuttering and printing.