This section is from the book "Complete Self-Instructing Library Of Practical Photography", by J. B. Schriever. Also available from Amazon: Complete Self-Instructing Library Of Practical Photography.
A photo-engraving process by means of which a bichromated gelatin image is placed on a lithographic stone, the reproduction being taken from this in ink by impression, in the manner of an ordinary lithograph.
A process of enlarging minute objects by means of the microscope and reproducing the large image by photography.
(See Salts, Haloid.)
Minute, transparent spots or holes in the negative, usually caused by dust.
(See Perspective, Plane.)
(See Lens, Concave, Piano.)
(See Lens, Convex, Piano.)
(See Calcium Sulphate.)
(See Lens, Plastigmat.)
An attachment for film cameras enabling the use of plates.
A light tight box or receptacle in which the sensitive photographic plate may be placed either before or after exposure.
(See Holder, Plate.)
A rack in which plates may be placed to dry. Generally termed negative drying rack.
Mounts having a center portion pressed or sunken in.
When desired to cut a dry-plate, lay it, film side down, on a perfectly clean sheet of lintless paper, and proceed to cut in the same manner as ordinary glass. Of course it is necessary to do this in the dark-room.