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Development Of Water-Based Ink System For Braille Printing, Saurabh Varma
Development Of Water-Based Ink System For Braille Printing, Saurabh Varma
Masters Theses
The most commonly used system of writing by and for blind persons is called Braille, named after its French inventor, Louis Braille (1809-1952). Braille is comprised of a rectangular six-dot cell on its end, with up to 63 possible combinations using one or more of the six dots. Braille is the only reliable method of literacy for blind persons, because it enables them to read and write by touch1.
Currently, Braille is printed by special embossers that serve as a printing press. These embossers create Braille output when it is attached appropriately to computers. The speed of these …
Uv-Vis Spectral Analysis Of Spot Colors, Radovan Sporka
Uv-Vis Spectral Analysis Of Spot Colors, Radovan Sporka
Masters Theses
Press return inks represent a continuous problem in printing industry. The best way of utilizing them is to mix them into new colors. Efficiently to do so, it is necessary to determine their composition first. The spot color inks for product gravure were analyzed using Perkin Elmer Spectrometer LAMBDA 900. UV/VIS/NIR analysis of mixtures showed rather similar course of ink spectra in ultraviolet and near infrared region. Thus, the VIS range from 400 - 700 nm was used for further analysis. The unique course of spectral curves of each pigment in visible region enabled successful qualitative analysis of two- and …
Rheology Of Silica Based Inkjet Coatings And Their Filterability, Peeyush Tripathi
Rheology Of Silica Based Inkjet Coatings And Their Filterability, Peeyush Tripathi
Masters Theses
Coating rheology has long been understood to be a key factor in the smooth operation and performance of a coater. As coaters run faster and formulations become more complex, the demands on a coating's rheology grow more stringent.
Silica based coating formulations present unique rheological challenges, thus providing the opportunity for coating formulators to improve their performance through rheological studies under various conditions of shear. Due to rheological restrictions (gelling), silica based coatings are generally applied at 25-26% solids which is very low as compared to calcium carbonate or clay based coating, at 68-70% solids. Consequently, any improvement in coatings …