The printing-frame must have a clear glass which just fits it.
Above the cylinder is a board on which is fastened the stone with the printing-frame.
It is far better to have a printing-frame that is so fixed that it will never shift its position in the slightest degree.
Cleaning board, dark slide, and printing-frame, were all curved.
No vestige of an outline appeared on removal from the printing-frame.
Inside of the printing-frame was a smaller frame with cords, to hold the paper, which had a layer of gray blotting-paper under it.
Generally a lever press is so made that the printing-frame can be raised or lowered according to the thickness of the stone.
Its construction is as follows: The stone is fastened to a table with the printing-frame which has fine felt instead of leather.
I may mention that I recommend a short exposure in the printing-frame and slow development, in order to get sufficient intensity.
Attach the flat edge to the side of the printing-frame so as to shield the landscape part of the negative.