Good afternoon all. I am a first timer here and currently on a steep learning curve so looking for a bit of help. I purchased the photopolymer printing kit from cooks on gold and have tried many times now to make my first polymer stamp and failed miserably each time. I have read all the posts on here I could find and watched many youtube videos. I'm sure I can master this! Questions are: is there any visible way of telling if the plates have been exposed and won't work? When I received the the kit, I naively opened it in daylight! Also if I'm testing it on a timer and it doesn't work after first go, is it only fit for the bin and can't be reused? Should I be using it in the dark? I'm thinking I need to buy new polymer plates! Thanks to any of you who may be able to help. 😊