Flashlight Photography

A branch of photography whereby instantaneous pictures are made at night by the aid of flash powder in some form placed in a convenient receptacle.

Floral Photography

Pin-Hole Photography

The method of obtaining a photographic image by means of a small hole made by a needle in a metal plate instead of by means of a lens.

Photogravure

A photographic process of reproduction giving prints which are intended to resemble fine copper-plate engravings.

Photo-Lithography

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.

Photo-Micrography

A process of enlarging minute objects by means of the microscope and reproducing the large image by photography.

Photo-Salts

(See Salts, Haloid.)

Photo-Sensitive

A term applied to a substance which is sensitive to light.

Pigment

Coloring matter incorporated with sensitive material and forming the image in the carbon and similar processes.

Pinatype Three-Color Process - VIII.

Pin-Holes

Minute, transparent spots or holes in the negative, usually caused by dust.

Plain Portrait Lighting

Plain Salted Paper. (See Paper, Salted.)

Plane Perspective

(See Perspective, Plane.)

Piano-Concave Lens

(See Lens, Concave, Piano.)

Piano-Convex Lens

(See Lens, Convex, Piano.)

Plaster-of-Paris

(See Calcium Sulphate.)

Plastigmat Lens

(See Lens, Plastigmat.)

Plate

A photographic term generally applied to the support for the sensitive emulsion in various processes, such as Daguerreotype-plate, collodion-plate, dry-plate, ferrotype-plate, etc.

Plate Adapter

An attachment for film cameras enabling the use of plates.

Plate Box

A light tight box or receptacle in which the sensitive photographic plate may be placed either before or after exposure.

Plate-Holder

(See Holder, Plate.)

Plate-Lifter

A contrivance for raising the negative during development. Used to avoid staining the hands.

Plate-Rack

A rack in which plates may be placed to dry. Generally termed negative drying rack.

Plate-Sunk Mount

Mounts having a center portion pressed or sunken in.

Plate-Vise

An arrangement for holding (a) a glass plate in position for polishing, or (b) a lantern-slide with cover-glass in position for binding.

Backing for Plates

A coating of light absorbing or non-reflecting material, applied to the back of a plate to prevent halation. (See Halation.)

Cutting Plates

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.