Gelatin as Photosensitive Material

Calixto, Sergio; Ganzherli, N. M.; Gulyaev, S. N.; Figueroa-gerstenmaier, Susana

doi:10.20944/preprints201806.0336.v1

Cited by 14 publications

(2 citation statements)

References 69 publications

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“…Figure 3: From analogue negative via photopolymer plate and silicon cast to Woodburytype Figure 4: CIE luminance as function of carbon black concentration and optical path length in the dried gelatin layer from (Leech, et al, 2019) Figure 5: Woodburytype on inkjet microporous photographic paper, pulled from a silicon printing plate Figure 6: Woodburytype on silk mounted in card board When a gelatin coated substrate is soaked in a solution of potassium or ammonium dichromate, it becomes light sensitive to wavelengths below 540 nm (Calixto, et al, 2018). Dichromated gelatin is selectively tanned when exposed to UV radiation, i.e.…”

Section: Dichromated Gelatin and Historical Plate Preparationmentioning

confidence: 99%

Woodburytype: A historical process resurrected by modern methods

Klein¹

2020

IMPACT J

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One of the technological achievements of the 19th century was the mass reproduction of photographic images. Woodburytype was thefirst commercially successful photomechanical continuous tone printing method, of unsurpassed quality until today. Along with Collotype and Goupil gravure, it used the relief of dichromated gelatin exposed to light as the basis for the printing plates. In this article we will discuss the historical printing processes and present how a) modern embodiments of the printing plates can be made by either CNC milling or using photopolymer plates and b) how optimal contrast and grayscale can be achieved by ink formulations tuned to the relief depth of the printing plate.

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Section: Dichromated Gelatin and Historical Plate Preparationmentioning

confidence: 99%

Woodburytype: A historical process resurrected by modern methods

Klein¹

2020

IMPACT J

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“…18 More recently, different forms of gelatin have been contemplated for application in diffraction optics. 19 Computer-generated holograms were produced on sugar (sucrose) crystals by UV microlithography techniques (λ = 240 nm), with a diffraction efficiency of around 45%. 20 Sugar concentration could be measured in aqueous solutions through the spacing of an optical fiber.…”

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confidence: 99%

Direct Printing of Nanostructured Holograms on Consumable Substrates

et al. 2021

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Direct texturing of nanostructures on consumable substrates and products is a challenge because of incompatible ingredients and materials’ properties. Here, we developed a direct laser-based method to print nanostructured holograms on dried films of consumable corn syrup solutions. A holographic laser (λ = 1050 nm) interference system was used to construct the nanostructures of the holograms on food for rainbow effects. The relationship between wavelength and periodicity contributed to the changing diffraction angle through the change of the refractive index (1.642). Increasing the sugar concentration (25–175 mg) in the syrup increased the diffraction efficiency of these holograms. The added amount of sugar in the composition increased the refractive index (7%) and decreased the light absorption (12.9%), which influenced the change of diffraction angle by 4.4°. The surface holograms displayed wideband visual diffraction of light extending from violet to red wavelengths. These holograms on edible materials can be imprinted onto commercial food products for adding aesthetic value and controlling perception.

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