We report a method for creating synthetic diatom frustules via the biomimetic silicification of polyamine-rich scaffolds assembled by direct ink writing (DIW) [G. M. Gratson, M. Xu and J. A. Lewis, Nature, 2004, 428, 386, ref. 1]. A concentrated polyamine-rich ink is robotically deposited in a complex 3D pattern that mimics the shape of naturally occurring diatom frustules, Triceratium favus Eh...

Commenting on a student’s computer program with red pen ink annotations is not possible with current software and paper program ‘listings’ are a relic of a bygone era. Yet ink annotations are the easiest way to provide rich feedback to the student. We have developed and evaluated Penmarked as a software solution to this problem. It supports free-form ink annotations and, importantly, associated...

We consider the problem of predicting the spectral reflec-tance of paper samples immersed in ink mixtures of varying ink concentrations. Relying on an adapted version of the Kubelka-Munk theory, we predict the reflectances of the samples dyed by ink mixtures. We first derive a method to calculate the effective scattering coefficient of an inked paper sample as a function of its absorbance coeff...

Polyamine-rich complexes are developed for microscale patterning of planar and 3-D structures by direct ink writing. The complexes are formed by mixing poly(allylamine) hydrochloride and poly(acrylic acid) sodium salt in water in a nonstoichiometric ratio. Their phase behavior, rheological properties, and coagulation behavior in alcohol-water reservoirs are characterized. Direct comparisons are...

The purpose of this study was to investigate the effect of the reactive dye structure and type of penetrant in ink formulation on paper ink-jet printing. Different type of papers, which have same grammage was printed upon with three commercial reactive dyes, CI Reactive Blue 49 Ink 1, 4, CI Reactive Blue 21 Ink 2, Ink 5 and CI Reactive Blue 19 Ink 3, Ink 6, which are based on different reactive...

CalliMusic, is a system developed for users to generate traditional Chinese music by writing Chinese ink brush calligraphy, turning the long-believed strong linkage between the two art forms with rich histories into reality. In addition to traditional calligraphy writing instruments (brush, ink and paper), a camera is the only addition needed to convert the motion of the ink brush into musical ...

When poly(isopropylidene diallylmalonate) rich in threo-disyndiotactic sequences (st(rich)-2) was utilized as a cross-linkable ink for microcontact printing, the resultant submicrometer-scale patterns featuring 700 and 300 nm wide stripes were successfully insolubilized while maintaining their high dimensional integrity by heat-induced cross-linking with elimination of CO(2) and acetone. In sha...

Ink and Gold Tracing represents a unique distinctive approach within the realm of ceramic decorative art. Building upon foundation ink tones, artwork's colors are harmonized through incorporation red gold, resulting in more vibrant rich palette. The three strike balance that avoids excessive saturation heaviness, while exuding elegance sophistication, captivating observer. restrained use color ...

The purpose of this study was to investigate the effect of type of alcohols and humectants in inks formulation, and the papers surface morphology on the ink-jet printing properties. In order to investigate the influence of alcohol and humectant types on printing properties, the optimum ink formulation from previous study, which contained C.I. Reactive Blue 21 Ink2 was formulated with different ...

We present a framework for pen-based, multi-user, online collaboration in mathematical domains. This environment provides participants, who may be in the same room or across the planet, with a shared whiteboard and voice channel. The digital ink stream is transmitted as InkML, allowing special recognizers for different content types, such as mathematics and diagrams. Sessions may be recorded an...