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Articles 9691 - 9720 of 10269
Full-Text Articles in Entire DC Network
The Influence Of Bromide And Polyethylene Oxide Upon Development Kinetics, Robert Durbin
The Influence Of Bromide And Polyethylene Oxide Upon Development Kinetics, Robert Durbin
Theses
It has been previously reported that the speed and contrast of a given film-developer combination is influenced by the addition of PEO to either the developer or to the emulsion. Factorial experiments were conducted upon Ag(Brl) and Ag(BrCl) films to determine the PEO development effects on hydroquinone and N-methyl-p-aminophenol developers of normal sulfite level. Various levels of exposure, bromide concentration, and PEO addition to the developer were employed to gain information about possible interactions as well as individual effects. Density-log time of development curves were obtained using the method of arrested development. Response variables were induction period and maximum rate …
Komchen, A Maya Village, Stephen Gaye
Discover Town Centers: Educational Urban Information, Jeffrey Huff
Discover Town Centers: Educational Urban Information, Jeffrey Huff
Theses
None provided.
An Evaluation Of The Primary Factors Which Influence Proportionality Failure, Daniel Levine
An Evaluation Of The Primary Factors Which Influence Proportionality Failure, Daniel Levine
Theses
If practical colorants could be found to meet theoretical requirements then there would be no need for color correction in multi-color printing. Color correction is necessary because the available yellow, magenta, and cyan inks absorb and transmit in all parts of the visible spectrum. It is possible to measure how much these colorants deviate from the ideal with the use of a reflection densitometer. The red, green, and blue filter positions on a densitometer will read the cyan, magenta, and yellow densities respectively. From these densities the amount of color correction necessary to compensate for the inks deficiencies is expressed …
The Pre-Setting Of The Ink Distribution Keys Of A Small Sheet-Fed Offset Press, Bruce May
The Pre-Setting Of The Ink Distribution Keys Of A Small Sheet-Fed Offset Press, Bruce May
Theses
The problem is to devise a system of pre-setting the ink keys of a sheet-fed offset press in order to save make-ready time. A preliminary experiment is run to establish and identify the correlation between the information obtained from visually scanning the plates and the ink key dial settings. The test involves a control group and a test group making press runs to see if pre-setting the ink keys can save time. The results show that such an idea is possible. The preliminary experiment establishes a positive correlation between the two variables and test group press-run times are significantly less …
A Study To Assess The Aesthetic And Economic Viability Of Producing Original Fine Art Prints And Autographic Artists Books On A Rotary Offset Press, And An Introduction To A New Medium For Creating And Producing Original Fine Art Prints And Autographic Artists Books, Daniel Richard Tucker
Theses
This study investigates factors which the author believes could contribute to the determination of the aesthetic and economic viability of producing original fine art prints and artists books on a rotary offset press using direct imaged, uncoated lithographic plates. It also introduces a new medium for the creation and production of these works which was developed during this study. This investigation has been accomplished in the following ways: First, answers were sought to ten questions the author believed any artist considering the use of a rotary offset press as a means of producing these works would want to know. The …
A Quantitative Method Of Pre-Setting The Ink Distribution Keys Of An Offset Duplicator Using A Photoelectric Estimating Unit, Martin Marino
A Quantitative Method Of Pre-Setting The Ink Distribution Keys Of An Offset Duplicator Using A Photoelectric Estimating Unit, Martin Marino
Theses
The purpose of this study was to study the feasibility of quantitatively pre-setting the ink key distribution on an off-set press. Presently the pre-settings of the ink keys has been left to the pressmens' ability and experience. This, in many cases, involves much "trial and error" work along with lengthy makeready times. This study attempted to reduce makeready time by quantitatively pre-setting ink keys from data obtained from an estimating unit and use of a set of calibration curves. A photoelectric estimating unit was designed and constructed to read integrated densities of copy to be printed. There was one reading …
An Investigation Into The Emulsification And Determination Of Water In Lithographic Ink Emulsions, Thomas Saczawa
An Investigation Into The Emulsification And Determination Of Water In Lithographic Ink Emulsions, Thomas Saczawa
Theses
A study of the emulsification process of lithographic ink and water was conducted to investigate methods for determining the water content of lithographic ink and water emulsions. Experiments using infra-red spectroscopy and analysis of the hydroxyl and carbonyl absorption bands revealed several variables which must be considered when attempting to use infra-red spectroscopic methods for the determination of the water content of ink emulsions. These factors include the choice of pigment, (either transparent or opaque), the type of cell medium, and methods for dispersing added water into an ink. The initial problem encountered was a lack of reproducibility when attempting …
Intensity Scale Sensitometer, Swaminathan Kalyanam
The Influence Of Test Colors On The Color Rendering Index Maximization In A Three Component Spectral Power Distribution, Gregory Miller
The Influence Of Test Colors On The Color Rendering Index Maximization In A Three Component Spectral Power Distribution, Gregory Miller
Theses
This thesis describes the technique of principle component analysis as applied to determining if a combination of three characteristic vectors would account for an underlying structure in the eight color test objects specified by the CIE for calculation of the color rendering index (CRI). Anticipated was that three vectors would account for 100 % of the variance in the eight test objects; however it was determined that three vectors account for only 96 % of the variance. Since the analysis of the reflectance functions showed no dependence within the functions a 3^3 factorial experiment was conducted. Its purpose was to …
Redesign Of The Rms Granularity Meter, Robert Bathgate, Filippo Ferrauto
Redesign Of The Rms Granularity Meter, Robert Bathgate, Filippo Ferrauto
Theses
A device for measuring RMS granularity of uniformly exposed and uniformly processed photographic material was built. This paper deals with the construction of the major components of the system. The components constructed were the lamp mount, lamp housing, current regulated ripple free power supply for the lamp, the replacement of the motor drive system for the sample stage with a synchronous motor, and the construction of the photo detection system. All these components were mounted on a triangular optical bench around an existing symetrical design microdensitometer with rotating sample stage.
Production Of A Film On Conservation Education, Lesley Woodfin
Studies Of The Properties Of Poly (Ethylene Oxide) As A Substitute For Gum Arabic In The Fountain Solution, Orapan Chongpipatanasook
Studies Of The Properties Of Poly (Ethylene Oxide) As A Substitute For Gum Arabic In The Fountain Solution, Orapan Chongpipatanasook
Theses
Poly (ethylene oxide) is a polymer of ethylene oxide. It is one of the classes of synthetic water soluble resins which are commercially available. The properties of poly (ethylene oxide) as a desensitizer in the fountain solution were studied. The solution of this resin was compared to gum arabic solution. The investigation included the study of the physical properties of the solutions at different concentrations as well as press performance. Comparisons were made as to wettability, viscosity, surface tension, the ability to clean the plate, the resistance to scum, printing sharpness, resolution, and the plate-press characteristic curve. The experiments were …
Image Intensification By A Low Level Light Exposure Before, During, And After An Image Exposure, Robert Rippstein
Image Intensification By A Low Level Light Exposure Before, During, And After An Image Exposure, Robert Rippstein
Theses
The purpose of this thesis is to study the effects on the shape and position of the characteristic curve due to a low level uniform exposure to white light. This was accomplished using a special camera which produced an image of a neutral density -wedge on a film strip. One half of this image was covered while the other half was uniformly exposed to a low level light exposure. In some cases the low level exposure was first applied to half of the film strip with the image exposure occurring second. The density differences between the two halves of the …
Ash Glazes, Local Slip Glazes And Once Fire Process, Howard Skinner
Ash Glazes, Local Slip Glazes And Once Fire Process, Howard Skinner
Theses
My reasons for writing this thesis is to present my findings which have resulted from my explorations into the development of ash glazes, local slip glazes, once fire techniques and the production of an oriented ash glaze surface which will be consistent enough to be used on a steady line of functional dinnerware and accessories. Investigation into these areas was stimulated by a striving to join myself with the closeness of ash and natural clay glazes to the relation of the clay-forming process itself. Also the investigation has led toward the development of the once fire method which has resulted …
Interimage Effects In Various Subtractive Color Materials, Philip Wychorski
Interimage Effects In Various Subtractive Color Materials, Philip Wychorski
Theses
In three color photographic processes the cyan dye image is usually controlled by the red sensitive emulsion, the magenta dye image by the green sensitive layer, and the yellow dye image by the blue sensitive layer. Due to the proximity of these three layers in a color film interactions among the images are found to occur. It has been found that when the images are combined into a three color picture they do not have the same characteristics as they would have if they occurred separately. The density produced in each layer depends not only on the amount of exposure …
Mass Production Techniques For The Studio Potter, James Halvorson
Calculation Of The Time Averaged Optical Transfer Function By The Fast Fourier Transform, Jan Pierce
Calculation Of The Time Averaged Optical Transfer Function By The Fast Fourier Transform, Jan Pierce
Theses
The fast Fourier transform is used in two-dimensions to calculate the apodizing effect of a center opening pupil shutter. Two shutter models are investigated and compared, a circular shutter with diameter a function of time, and a five-bladed leaf-type shutter. The influence of shutter shape, defocus, and third and fifth order spherical aberration on the time-averaged optical transfer function is investigated. The results indicate that there is only a small effect on resolution and depth of focus due to shutter motion in a well corrected optical system.
Tumbling Through Time: An Inquiry Into Vision, Charles Fisher
Design, Construction, And Testing Of Sequentially Flashing Led Array To Study Angular Camera Motion In Hand Held Camera Systems, Randall Hube
Theses
This project deals with the construction of a device to determine the actual angular motion in a hand held camera system caused only by the holder. An array of LEDs (8x8) is flashed so that one LED flashes at a time in sequence. This sequence is photographed by a system suffering from motion effects and this is compared with the image of the array when no motion effects are present. The displacements of each "blip" with respect to time is used to determine the motion of the camera system.
Design And Construction Of An Edge Exposure Apparatus, Michael Benson
Design And Construction Of An Edge Exposure Apparatus, Michael Benson
Theses
A means of producing photographic edges using visible radiation is often a requirement for evaluating some of the image characteristics of a photographic emulsion. The method of producing edges described uses a high quality razor blade for the knife edge held at a small angle to the film plane. The instrument is detailed and elaborates on the major features of the constructed apparatus. These features are a vacuum surface to insure film flattness; the knife edge held by a jaw-clamp assembly that pivots to allow for contrast control of the image; and exposure through a tungston-halogen lamp and an electronic …
An Investigation Of The Electrooptical Properties Of A Dipole Suspension Of Iodoquinine Sulfate, Michael Smalter, Roy Dohlen
An Investigation Of The Electrooptical Properties Of A Dipole Suspension Of Iodoquinine Sulfate, Michael Smalter, Roy Dohlen
Theses
The objective of this thesis is to investigate the electrooptical properties of a dipole suspension. A dipole suspension consists of needle-like crystals which, in the presence of an electric field, orient themselves parallel to it. If the dipoles align themselves parallel to incident light, the suspension will transmit the light. If no electric field is present, the dipoles are in a random state, and little light is transmitted. The projected area of the dipoles is smaller when they are in the aligned state. Commercially, a dipole suspension is available from Marks Polarized Corporation as the product Varad. This thesis will …
A Suite Of Color Images Printed By Screen Process, Pamela Brueckner
A Suite Of Color Images Printed By Screen Process, Pamela Brueckner
Theses
None provided.
Window, Bialy Mark
Window, Mark Bialy
Ocean-Marks, Donna Sylvester
Urban Landscapes, Albert Robbins
Development Of An Identity Program For The International Narcotics Control Board, United Nations, Geneva, Switzerland, Elizabeth Simon
Development Of An Identity Program For The International Narcotics Control Board, United Nations, Geneva, Switzerland, Elizabeth Simon
Theses
None provided.
Painted Motion, Joseph Litow
Fireworks: Raku And Sawdust Fired Photography, Jerome Nevins