The Kodak Salesman . atent image is impressed, andthrough suitable chemical develop-ment brought out as a negative. Tomake a sensitive emulsion a silvernitrate solution is mixed with a so-lution of potassium bromide andgelatine dissolved in hot water, thusforming insoluble silver bromide inthe solution, which is the compoundthat is sensitive to light. The warmsolution of gelatine containing thesilver bromide is coated on thenitro-cellulose backing already de-scribed. The gelatine solution withthe silver compound in it is calledan emulsion because of the way inwhich the silver bromide remainssu
The Kodak Salesman . atent image is impressed, andthrough suitable chemical develop-ment brought out as a negative. Tomake a sensitive emulsion a silvernitrate solution is mixed with a so-lution of potassium bromide andgelatine dissolved in hot water, thusforming insoluble silver bromide inthe solution, which is the compoundthat is sensitive to light. The warmsolution of gelatine containing thesilver bromide is coated on thenitro-cellulose backing already de-scribed. The gelatine solution withthe silver compound in it is calledan emulsion because of the way inwhich the silver bromide remainssuspended in the gelatine. Afterthe emulsion has been applied thefilm is handled only in dark roomswhich are kept at a constant tem-perature and humidity. Of course,the need of handling the huge quan-titles of sensitive film and operatingnumerous machines in dark roomsincreases the difficulty of manufac-ture and greatly adds to the careand vigilance that must always beexercised to secure a high quality ^ KODAK SALESMAN. Motion Picture Film Shipping Room product. The large rolls of sensi-tized film are now packed in longtin cans and stored in a special roomuntil the slitting and inspection de-partments are ready for them. The film is inspected very care-fully and then slit into variouslengths and widths for motion-pic-ture purposes and to fit the differenttypes of Kodaks and Brownies andother kinds of cameras turned outby the Kodak Compan}-. A con-tinual search for defects is main-tained so that only a high-gradeproduct may leave the plant. In-spections and tests figure in practi-cally every process. Besides repeat- ed chemical tests of raw materials,emulsions, etc., strips are takenfrom every large roll of film andsubjected to numerous tests. Theentire surface of every roll beforebeing cut up is also closely exam-ined by special inspectors. Withall this vigilance one can rest as-sured that the possibilit}- of any-thing but high-grade, high-averagequality film is very remote, and
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Keywords: ., bookcentury1900, bookdecade1910, bookidkodaksalesma, bookyear1917
