It was in an oven for 30mins. It was a while since I did this so I am not sure of the exact temperature (could have been less than 300) but the main point is to thoroughly dehydrate the glass. Also, the resist I used was S1813, not S1818 (again - it has been a while). Gareth Rupesh Sawant wrote: >Is that 300 deg in an oven or on a hot plate?. I have read that if we are >baking the slide in an oven then we have to keep it for a longer duration as >compared to the hot plate at the same temperature. i just want to confirm >from you. >