Fluorescent Yellow

Fluorescent Yellow
蛍光イエロー
Color coordinates
Hex	#F7FF00
RGB	(247, 255, 0)
CMYK	(3, 0, 100, 0)
CIELab*	(97, -19, 51)
Pantone	803 U
Ink information
Brand
Series	Custom
Product number(s)
Z-Type	S-7761

Fluorescent Yellow is a vibrant, high-visibility ink used in risograph printing, known for its bold, luminous quality and unique visual impact. a Custom series ink manufactured by the Riso Kagaku Corporation.

Characteristics

Fluorescent Yellow ink is somewhat opaque, which can make it challenging to overprint with other inks. As noted below, it is best if printed last. Like all fluorescent inks produced by Riso, it glows brightly under blacklight due to its phosphorescent properties. This quality makes it a striking choice for posters and other printed materials designed for environments where blacklight is used. The ink's fluorescence is achieved through pigments that absorb ultraviolet (UV) light and re-emit it as visible light, enhancing its vivid and luminous appearance.

Properties

Ingredient Name	CAS No.	EINECS No.	Classification (EC 1272/2008)	wt%
Glycerol	56-81-5	200-289-5	Not classified	0–10
Petroleum solvent	74869-22-0 64742-47-8	278-012-2 926-141-6	Not classified Asp. Tox. 1; H304	0–5
Pigment	Trade secret	Trade secret	Not classified	Trade secret
Alkyd resin	Trade secret	Not applicable	Not classified	Trade secret
Water	7732-18-5	231-791-2	Not classified	Trade secret

Ingredients provided by the Riso UK material safety data sheet

Availability

Because has chosen not to distribute its new fluorescent inks in North America, these inks are difficult to obtain in the Western Hemisphere, as all distribution for North and South America is centralized in the United States. It is widely available throughout Riso's other core markets, like Asia and Europe.

History

Released in 2017, preview ink samples of Fluorescent Yellow, Fluorescent Green, and Fluorescent Red were presented by Riso Benelux marketing staff at the Magical Riso symposium in late 2016.

Examples in print

• 

  Print sample presented by Riso Benelux staff at Magical Riso 2016.

• 

  Fluorescent Yellow under blacklight, printed by Pamflett.

Printing tips

Riso's fluorescent inks are tackier and slower to dry compared to standard Riso inks, requiring thoughtful planning of the print order and design. Fluorescent Yellow ink, in particular, can clog the perforations in stencils, preventing subsequent colors from printing effectively. For this reason, it is recommended to use fluorescent inks as the final layer in the print sequence whenever possible.

Fluorescent Yellow

75%

50%

25%

HEX: #F7FF00RGB: (247, 255, 0)CMYK: (3, 0, 100, 0)

Usage

There are 20 places printing with Fluorescent Yellow (6% of all active places).

BearBear 🇺🇸Calipso Press - New York 🇺🇸Corners Printing 🇰🇷De Kijm - Bijzonder drukwerk 🇳🇱Duplikat Press 🇬🇧Eliska Kacvinsky Judova 🇨🇿Hand saw press TOKYO 🇯🇵Herr & Frau Rio 🇩🇪Issue Press 🇺🇸JAM Osaka 🇯🇵KMD RISO 🇳🇴Klub der Kleinkarierten 🇩🇪Knust 🇳🇱PageMasters 🇬🇧Pamflett 🇳🇴Perfectly Acceptable Press 🇺🇸Quintal Print House 🇫🇷RISOFORT 🇩🇪Risolution 🇫🇷We Do Good 🇻🇳

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A map of the 20 places printing with Fluorescent Yellow—as listed in the Atlas.