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Sources of Pigmentless Colour in Nature – Seashells, Butterflies and Beetles (2020)
Presentation / Conference
Leech, D. (2020, June). Sources of Pigmentless Colour in Nature – Seashells, Butterflies and Beetles

Colour arises most prominently in the world from subtractive processes, such as pigmentation. When light is shone upon a painted wall, for instance, pigment absorbs portions of the electromagnetic spectrum that the material underneath did not and we... Read More about Sources of Pigmentless Colour in Nature – Seashells, Butterflies and Beetles.

Origins of Colouration in Invertebrates – Pigment and Structure (2020)
Presentation / Conference
Leech, D. (2020, June). Origins of Colouration in Invertebrates – Pigment and Structure. Presented at Field Studies Council Virtual Meet Ups

Colour/pattern recognition is a common cornerstone of animal identification, however, the processes by which animals actually display colour is incredibly complex. Beyond the simple pigmented systems, that also form the basis of our paints and inks,... Read More about Origins of Colouration in Invertebrates – Pigment and Structure.

The polychromatic Woodburytype: Colour tracking in translucent, patterned gelatin/pigment films (2020)
Journal Article
Leech, D. J., Guy, W., & Klein, S. (2020). The polychromatic Woodburytype: Colour tracking in translucent, patterned gelatin/pigment films. Molecules, 25(11), https://doi.org/10.3390/molecules25112468

The Woodburytype is a 19th century photomechanical technique capable of producing high-quality continuous-tone prints. It uses pigment dispersed in gelatin to produce a 2.5D print, in which the effect of varying tone is produced by a variation in the... Read More about The polychromatic Woodburytype: Colour tracking in translucent, patterned gelatin/pigment films.

Woodburytype: A historical process resurrected by modern methods (2020)
Journal Article
Klein, S., Guy, W., Leech, D., & Argyle, J. (2020). Woodburytype: A historical process resurrected by modern methods. IMPACT Printmaking Journal,

One of the technological achievements of the 19th century was the mass reproduction of photographic images. Woodburytype was the first commercially successful photomechanical continuous tone printing method, of unsurpassed quality until today. Along... Read More about Woodburytype: A historical process resurrected by modern methods.

Continuous Tone Printing from Gel Matrices - The Woodburytype (2020)
Presentation / Conference
Leech, D., Guy, W., & Klein, S. (2020, March). Continuous Tone Printing from Gel Matrices - The Woodburytype

Prevailing print techniques such as inkjet rely on halftoning, a process whereby image tone is approximated by a matrix of droplets varying in density. This, while useful in many applications, ensures a direct link between the resolution and the drop... Read More about Continuous Tone Printing from Gel Matrices - The Woodburytype.

The optical properties of the Woodburytype - An alternative printing technique based on a gelatine/pigment matrix (2020)
Journal Article
Leech, D., Guy, W., & Klein, S. (2020). The optical properties of the Woodburytype - An alternative printing technique based on a gelatine/pigment matrix. Journal of Physics Communications, 4(1), https://doi.org/10.1088/2399-6528/ab6ed4

The Woodburytype is a 19th century photomechanical printing method, producing high-quality continuous-tone images that use a suspension of carbon black in gelatine as a relief print, in which the variation in height of the print produces the grayscal... Read More about The optical properties of the Woodburytype - An alternative printing technique based on a gelatine/pigment matrix.

The Physics of Print (2020)
Presentation / Conference
Leech, D. (2020, January). The Physics of Print

Read With Me – an exhibition of an experiment (2019)
Exhibition / Performance
Bodman, S. Read With Me – an exhibition of an experiment. [n/a]. Exhibited at Bower Ashton Library, UWE, Bristol, UK. 2 December 2019 - 15 January 2020. (Unpublished)

2nd December 2019 – 15th January 2020 Exhibition in the study area, Bower Ashton Library, UWE, Bristol, UK Sarah Bodman: This exhibition continues the Read To Me project – an experiment made in collaboration with a psychometric reader, as an attemp... Read More about Read With Me – an exhibition of an experiment.

Read With Me (2019)
Exhibition / Performance
Bodman, S. Read With Me. [n/a]. Performed at Arnolfini, Bristol, UK. 14 November 2019 - 14 November 2019. (Unpublished)

An automatic drawing experiment took place on Thursday 14th November 2019 at Arnolfini bookshop. Participants were invited to attend or to conduct the experiment remotely. The drawings were exhibited at Bower Ashton Library December 2019 and will fo... Read More about Read With Me.

The optical properties of the Woodburytype - An alternative printing technique based on a gelatine/pigment matrix (2019)
Conference Proceeding
Klein, S., Leech, D., & Guy, W. (2019). The optical properties of the Woodburytype - An alternative printing technique based on a gelatine/pigment matrix. https://doi.org/10.2352/ISSN.2169-4451.2019.35.42

The Woodburytype is a 19th century photomechanical technique, producing high-quality continuous-tone prints that use a mixture of pigment and gelatine as a relief print, in which the variation in height of the print produces the tone and contrast. We... Read More about The optical properties of the Woodburytype - An alternative printing technique based on a gelatine/pigment matrix.

And now for something completely different: Woodburytype (2019)
Presentation / Conference
Klein, S., & Leech, D. (2019, April). And now for something completely different: Woodburytype. Presented at British Liquid Crystal Society 2019 Annual Conference

Woodburytype, invented by Walter B. Woodbury and patented in 1863, was the first commercially successful mechanical printing process for the permanent reproduction of photographic quality pictures and today is still unsurpassed in producing continuou... Read More about And now for something completely different: Woodburytype.

Valley-polarized tunneling currents in bilayer graphene tunneling transistors (2019)
Journal Article
Thompson, J. J. P., Leech, D. J., & Mucha-Kruczyński, M. (2019). Valley-polarized tunneling currents in bilayer graphene tunneling transistors. Physical Review B, 99(8), https://doi.org/10.1103/PhysRevB.99.085420

We study theoretically the electron current across a monolayer graphene/hexagonal boron nitride/bilayer graphene tunneling junction in an external magnetic field perpendicular to the layers. We show that change in effective tunneling barrier width fo... Read More about Valley-polarized tunneling currents in bilayer graphene tunneling transistors.


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