It has now been discovered that these problems and others in connection with spot cutting can be reduced or eliminated by using a support surface covered with a thin, relatively soft, layer, i.e., one that is softer than the underlying support surface, on {HEAD ~ the side} facing {TAIL ~ the gel} or membrane 
facing
It has now been discovered that these problems and others in connection with spot cutting can be reduced or eliminated by using a support surface covered with a thin , relatively soft , layer , i.e. , one that is softer than the underlying support surface , on { HEAD ~ the side } facing { TAIL ~ the gel } or membrane
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