Digital Commons Network^™

An Investigation Of The Effect Of An Infrared Post-Exposure Latent Image In A 3m Dry Silver Film, Thomas J. Cardinali

Theses

An investigation to determine the effect of an infrared post-exposure on the latent image in blue sensitive 3M Dry Silver film 7842 was performed. The film was first given a step tablet exposure using the unfiltered output of a tungsten source at 2856 K. A Wratten #87C filter was used with the same source to provide the second, infrared exposure over one half of the first exposure area. Absolute exposure and exposure reciprocity were tested. Processing was by immersion into a bath of 3M fluorocarbon FC-43 maintained at 127C/260F. The original objective, to cause Herschel effect bleaching of latent image, …

Reporter - Summer 1982, Rit Reporter Staff

University Publications

No abstract provided.

The Application And Analysis Of An Antireflection Coating On A Multilayer Resist System To Generate A 1.0 Μm Aluminum Line Over 0.5 Μm Sio2 Step, Chung-Ta Wu

Theses

An antireflection coating (ARC) containing polyvinyl alcohol and two dyes was applied to a substrate to form a new multilayer resist system.

Based on the results of the application of the ARC on a planar aluminum substrate, an increase of the latitude of exposure and an improvement of the resist image quality were found.

The ARC had a specific concentration of dyes and a specific thickness. The image was a 1.0 µm line and space pattern. By using the ARC, even though the resist thickness varied from 1.2 µm to 1.5 µm, the resulting 1.0 µm image remained within a …

R.I.T. News & Events - June 17, 1982, University News Services, Rochester Institute Of Technology

University Publications

No abstract provided.

Digitization, Testing, And Evaluation Of A Device For Rapid Determination Of Rms Granularity, Daniel J. Williams

Theses

A rotary stage microdensitometer was interfaced to an Apple II personal computer for the purpose of making rapid rms granularity measurements. An experimentally determined relationship was found between standard deviation in voltage and rms granularity. By using this relationship the device proved accurate to within 7 percent of the known values of rms granularity on a conventional microdensitometer for the same samples with 95 percent confidence.

R.I.T. News & Events - June 3, 1982, University News Services, Rochester Institute Of Technology

University Publications

No abstract provided.

Ntid Focus Summer 1982, Ntid Marketing And Communications

National Technical Institute for the Deaf Papers

British Shoot Yanks (on film)||Fabray & Friend Charm Local Media||Fairdinkum Auzzi Bloke||From Doodles to Drawings||Giving Students a Boost||Language Is Her Life||NTID News||Rubella: An Epidemic of the '60s Becomes an Issue of the '80s||Summer School for Professionals||Walking in a Silent World

Proposal And Investigation Of A Method For Measuring Process Color Variation Via Reflection Densitometer, Russell Harris

Theses

This thesis proposes a method of using reflection density readings taken with a conventional graphic arts densitometer to provide a numeric measure of the visual difference between a sample press sheet and a reference sheet. This numerical measure was developed based on the theory that human response to variation in process color printing is more affected by changes in the proportions of process inks to each other than by variation in the overall inking level of the press sheet. The thesis then goes on to explain how the proposed system was tested. First, a set of color samples was generated. …

Aurora Borealis, Carol Luzon

Theses

None provided.

Prediction Of Cut-Off Frequency From The Maximum Slope Of A Transmittance Scan Of An Ideal Edge, Dale E. Ewbank

Theses

This study has empirically shown that the maximum slope of an ideal edge scan in transmittance versus position is an excellent indicator of the cut-off frequency at which a microdensitometer system's modulation transfer function goes to zero. It was found that numerical aperture of collection objective, scanning slit width and alignment, system focus, and sampling interval are parameters which must be carefully chosen and set-up when implementing or using this slope technique to check system performance.

Reporter - May 14th 1982, Rit Reporter Staff

University Publications

No abstract provided.

R.I.T. News & Events - May 13, 1982, University News Services, Rochester Institute Of Technology

University Publications

No abstract provided.

Reporter - May 7th 1982, Rit Reporter Staff

University Publications

No abstract provided.

R.I.T. News & Events - May 6, 1982, University News Services, Rochester Institute Of Technology

University Publications

No abstract provided.

The Effect Of Ink/Fountain Solution Emulsion Of Paper Permanence, Thomas H. Spotts

Theses

The permanence of printed documents and books appears to be primarily dependent on paper stability. Other researchers implicate pH as a major factor in the deterioration rate of paper and acidity as major the cause of this deterioration. During the lithographic printing process, ink is in direct contact with fountain solution, which can be acidic or alkaline. Fountain solution is a mixture of water and chemicals used to keep the non-image areas of a lithographic plate moist. On press the intimate contact of ink with fountain solution creates a fountain solution-in-ink emulsion. The emulsion used here is a stable suspension …

The Ability Of Surfactants To Assist In The Removal Of Image Scum In Positive Resist Development, Michael P. Belden

Theses

An experiment was run to determine the ability of surfactants to reduce or remove scum produced during development of a positive resist. Anionic, cationic and nonionic surfactants were added to a low metal ion developer at concentrations between 0.025% and 0.57o. The film thickness loss due to development was measured, and image profiles were observed with scanning electron micrographs . Of the surfactants tried, Aerasol OT-75 (dioctyl ester of sodium sulfosuccinic acid) produced the best results, 9.57o film thickness loss with little image profile change. However, the experiment was limited by processing condition variables.

Factors Influencing Flexographic Tone Reproduction Including Types Of Printing Plate Materials Used, Bruce Capriotti

Theses

During the past three years, a number of photopolymer plates for flexographic printing have appeared on the market. The use of such a plate greatly simplifies flexographic platemaking by reducing the process to a level similar to that of a presensitized plate for offset lithography. A series of experiments were conducted to determine whether or not there were significant differences in the areas of half tone dots in different areas of the tonal scale on different types of flexographic plate materials all made from a single negative with a specially designed test object on it. Assuming significant differences were found …

An Investigation And Implementation Of Recommendation X.25 On A Motorola M6800 Based Network, Louis Nyerges

Theses

A subset of the Recommendation X.25 protocol is implemented on a two node network. Each node accepts and translates data from the user in a sequential fashion into the appropriate protocol structure for transmission to another node. Each node has the capability of full duplex operation. The hardware is built around a Motorola M6800 microprocessor employing a minimum of 4096 words of random access memory and two asynchronous ports: one for communication with the user and the other for communication with the network. The software on each node contains the protocol programs and a multitasking monitor which is used to …

Reporter - April 30th 1982, Rit Reporter Staff

University Publications

No abstract provided.

R.I.T. News & Events - April 29, 1982, University News Services, Rochester Institute Of Technology

University Publications

No abstract provided.

Optimization Of Positive Resist/Developer Pairs For Semiconductor Fabrication, John G. Maltabes

Theses

A study was conducted in which a series ofexperiments were performed using three positive photoresists and three developers in crossed experimentation, simulating semiconductor fabrication steps. Tests conducted, examined coating uniformity, unexposed resist loss, photosensitivity, undercut, and resist flow. Although there was not a clear-cut optimum resist/developer pair, some worked better than others.

Reporter - April 23rd 1982, Rit Reporter Staff

University Publications

No abstract provided.

R.I.T. News & Events - April 22, 1982, University News Services, Rochester Institute Of Technology

University Publications

No abstract provided.

Reporter - April 16th 1982, Rit Reporter Staff

University Publications

No abstract provided.

Reporter - April 9th1982, Rit Reporter Staff

University Publications

No abstract provided.

Reporter - April 2nd 1982, Rit Reporter Staff

University Publications

No abstract provided.

Distorter - April 1st 1982, Rit Reporter Staff

University Publications

No abstract provided.

A Comparison Of The Perception Of Juxtaposed Tones In Newspaper Images When Screened With Conventional And Random Dot Screens, Sylvia Monteiro

Theses

The halftone process has been the conventional means of reproducing photographic artwork on newsprint. The use of relatively coarse screen rulings, dictated by the paper characteristics, produces an image with a noticeable dot pattern. Furthermore, the printing process is susceptible to extreme dot gain variation, which affects tone reproduction and the pictorial communication of the image. There were good reasons to suspect that a random dot screen could give more consistent tone rendition than a conventional halftone screen. A comparative study of the consistency of perception of conventional and randomly screened images when printed on newsprint has not yet been …

Densitometrically Measured Effective Dot Area As A Function Of Ink Hue, Jeffrey Latzko

Theses

Percentage dot gain on coated and uncoated papers has been determined to be different depending on the ink hue used for 150 line screens. Cyan, magenta, yellow, and black inks all showed different amounts of dot gain from the printing plate to the paper- Effective dot area on the paper versus dot area on the printing plate data are presented.

The Stability Of Reciprocity Law Failure In Color Print Papers, Victoria L. Carriero

Theses

A study of reciprocity law failure in Kodak Ektacolor 74 and 78 color print papers was carried out by a series of equal engery exposures. Using a color separating filter pack to differentiate the response of RLF of the individual emulsion layers an acceptable color print is attainable by using these curves to determine exposure and filtration changes.