In recent years, the possibility of color three-dimensional printing has been introduced. The process described in this work is by ZCorporation, and is currently the only process enabling full color printing. The basic materials are in the shape of powder and binders, clear and/or colored. In order to obtain final mechanical and surface properties, 3D prints are almost always postprocessed with...

An important and difficult problem in the printing and graphic arts industries is that of color management. Color management refers to the facilitation of color reproduction among various digital color imaging devices such as scanners, displays, and printers. The current work centers on color management for four color printing, focusing specifically on the practice of gray component replacement...

Fig. 1. Our technique enables color printing with precisely controlled gradients using a filament printer. Le : The printer is equipped with an o -the-shelf nozzle that inputs multiple filaments (three in the picture) and outputs molten mixed plastic through a single exit hole. Such devices cannot directly be used to print gradients: the transition between mixtures takes time, and this timing v...

We develop a computer aided design (CAD) tool for the simulation and testing of a color image printing pipeline. True color images typically have three color planes (red, green and blue) with eight bits of resolution per pixel per image plane. Printing these images involves a binarization process called halftoning which converts each color plane into a binary image for rendering on binary devic...

Good print quality is the result of achieving high quality for a large number of attributes including color (color gamut and reproduction accuracy), density, tonal quality (tone reproduction and details in highlight, shadow and mid-tone), gloss, line quality (width, blurriness, raggedness,), text quality, adjacency (e.g. inter-color bleed), micro-uniformity (graininess), macro-uniformity (mottl...

Advances in multimaterial 3D printing have the potential to reproduce various visual appearance attributes of an object in addition to its shape. Since many existing 3D file formats encode color and translucency by RGBA textures mapped to 3D shapes, RGBA information is particularly important for practical applications. In contrast to color (encoded by RGB), which is specified by the object’s re...

To support color and high printing quality of a printer, we developed a piezoelectric type inkjet print head. In this system we adopted piezoelectric share mode, which is superb in ink drop control and can be applied to many fields.

An ink jet printing system consists of three fundamental parts: inks, printing engine, and substrates. Inks are materials creating color by selectively absorbing and scattering the visible illumination light. The printer acts as an ink distributor that governs the ink application. Finally, the substrate acts as a receiver of the inks and forms the images. Ink setting on the substrate is a compl...

We consider the problem of finding a color scale which performs well when converted to a grayscale. We assume that each color is converted to a shade of gray with the same intensity as the color. We also assume that the color scales have a linear variation of intensity and hue, and find scales which maximize the average chroma (or “colorfulness”) of the colors. We find two classes of solutions,...

In the past decade, the family of digital printing technologies has evolved from being just a tool to visualize information into a generator of functionalities. The phrase ′printing beyond color′ aptly sums up this transformation. While this family of printing technologies is still widely used to fulfill visual requirements, its development in the generation of functionality, especially in the ...