Cool. The bleach won't get underneath without the tape? Hmmm I will give it a try. I take it is essential to wet the emaulsionside to let it stick to the glass. Thanks for the tip.
I tried bleaching a few FP 100 negatives today, Have been saving the negative up, the ones I used to day where more that a year old. The bleaching seemed to worked fine. But negative seem to be BW. Do the color pigments fade? Or did i something wrong with the bleach or the convention to web use.