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Cyclopedia of Photography

Warner Powrie Process
Warner-powrie Process A Method Of Producing Screen-plates For Colour Photography Based On The Insolubilisation Of Bichromated Fish-glue By The Action Of Light, And Subsequent Mordanting And Staining Of The In Soluble Gelatine. The Chief Feature Of The Pro Cess Is The Extreme Simplicity Of Its Working, And The Absence Of ...

Washing
Washing (fr., Lavage ; Ger., Waschen, Reinigen) Negatives And Prints That Have Been Fixed In " Hypo " Must Be Freed Of This Substance By Wash Ing With Water Before They Can Be Safely Dried ; Otherwise The Permanency Of The Result Is Im Paired. " Hypo " Being Of ...

Waterproof Paper
Waterproof Paper Waterproof Paper Is Used For Mounting And Wrapping Up Chemicals And Sensitive Material. A Serviceable Waterproof Paper May Be Made By Brushing A Strong Solution Of Castile Soap Over Some Paper, And When Nearly Dry Brushing Over With A Strong Solution Of Chrome Alum. This Method Of Waterproofing ...

Woodburytype
Woodburytype A Photo-mechanical Process Invented By Mr. W. B. Woodbury In 1865, And Patented By Him On July 24, 1866. A Relief Image Is Obtained On Bichromated Gelatine, Covered With Lead, And The Two Forced Together In A Hydraulic Press, Which Produces A Reverse Or Mould In The Lead. The ...

Woods Diffraction Grating Pro
Wood's Diffraction Grating Pro Cess This Is Practically A Modification Of The Three Colour Process In Which Diffraction Gratings Ruled With A Varying Number Of Lines To The Inch Are Used Instead Of The Three Stained Filters, And The Principle Of The Process Can Be Easily Grasped From The Following ...

Working Up Prints
Working Up Prints A Term Usually Applied To Working Up Photo Graphs By Means Of Crayon Or Water Colour. The Air-brush May Be Employed Effectively For Soft, Shaded Or Clouded Backgrounds, Or For Any Mass Of Shading That Is Required To Be Evenly Or Delicately Graded Or Perfectly Flat. The ...

Wrinkling Of Film
Wrinkling Of Film When A Film Wrinkles At The Edges It Is Known As Frilling (which See). When The Whole Of The Film Is Wrinkled In Wavy Lines The Defect Is Known As Reticulation (which See). An Iodised Collodion To Which Is Added A Tincture Of Powdered Turmeric Giving To ...