so im making molds of pdms. and on to these molds, using more of the pdms, adding a thin layer, im adhering glass slides to these molds.
the problem arises is when after its done curing in an oven ( 60 C) i find bubbles, like air pockets between the pdms and glass slides.
i try to put it through a vacuum dessecator, like i do with the molds, before i cure them. after the vacuum, its straight to the oven. i ve had varying results, a little success.
does any one know what i am doing wrong, or what i could do to prevent this. thanks.