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The Barnet Book of Photography A Collection of Practical Articles

70 Accessories in Portraiture


Such

failures are generally produced by _soap_, _fat_, or _any kind_ of greasy substances being permitted to find their way into the water in which such prints have been manipulated previous to their final transfer. Another point should be mentioned: the sooner a print intended for second transfer is finished the better the result will be.

PRESSURE MARKS.

Pressure marks are caused by using damp tissue or damp pads in the pressure frame. It is recommended that a piece of waterproof material, such as mackintosh cloth, be placed between the tissue and the padding, and that the pads be as smooth and free from grain as possible. It will be found on close examination that the mottled, spotty appearance, known as pressure marks, closely resemble the texture of the pads behind the tissue.

_Thos. S. Skelton._

INDEX.

=A.= Alpine Photography, 9 " Outfit for, 9 " Lens for, 10 " Carrying camera in, 12 " Plates for, 14 " Carrying Baggage for, 15 " Outfit for Developing, 16 " Exposures, 17 " Development, 18 " " Formulae, 20 " Light (tables), 21, 22

Accelerator, 24

Alum Bath, Formula, 41

Aberration, Spherical, 60 " Chromatic, 61

Astigmatism, 62

Aplanat Lens, 64

Astigmat Lens, 64

Aperture of Lens, 68

Angle of Image, 70

Accessories in Portraiture, 79

Architectural Photography, 117 " " Camera for, 118 " " Lenses for, 119 " " Plates for, 122

Actinometer for Platinotype, 208 " for Carbon Process, 271

=B.=

Backing Mixtures, 49

Background in Portraiture, 78

Breadth in Pictorial Work, 93

Blisters on P.O.P, 194

Bromide Printing, 225 " Safe light for, 226 " Negative for, 227

Bromide Paper, sensitive side of, 227 " Printing, 232, 233, 227 " " Lamp for, 228

Bromide Printing, masks and discs, 230 " " Vignetting, 231 " " Cloud Printing, 231

Bromide Paper, development of., 233 " " Iron developer for, 234 " " Metol, 235 " " Hydrokinone for, 236 " " Eikonogen for, 236 " " Clearing Bath, 235 " " Fixing Bath, 235

Bromide Prints, toning with gold, 237 " " Toning with Uranium, 238 " " Intensifying, 238 " " Reducing, 239 " " Cheap Trays for, 240

=C.=


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