Dipping bottles can leave a more comprehensive stain with slightly greater longevity (depending on silver nitrate content) than markers can. Marker pens are the most efficient use of ink, with one 5 ml pen able to mark 600 people, although dipping bottles are often preferred, despite a 100 ml bottle only marking 1000. However, for the 2005 Surinamese legislative election, orange replaced violet as the colour for marking the voters' fingers as it was found to last just as long and be more appealing to voters, as it resembled the national colours. Colour Įlectoral stain is traditionally violet in colour, before the photosensitive element takes effect to leave a black or brown mark. Silver nitrate is an irritant and is used as a cauterizing agent at concentrations of 25% or higher. This means that the stain will fade as new skin grows. Stain with concentrations of silver nitrate higher than 18% have been found to have no added effect on stain longevity, as silver nitrate does not have a photosensitive reaction with live skin cells. It can take up to 4 months for the stain to be replaced completely by new nail growth. The election ink used puts a permanent mark on the cuticle area which only disappears with the growth of new nail. Silver nitrate can cause a condition called argyria, although this requires frequent or extreme exposure.Įlection stain typically stays on skin for 72–96 hours, lasting 2 to 4 weeks on the fingernail and cuticle area. Silver chloride can be easily removed by hydroxides, hence other photosensitive pigmentation needs to be added. Although normally water-based, electoral stains occasionally contain a solvent such as alcohol to allow for faster drying, especially when used with dipping bottles, which may also contain a biocide to ensure bacteria are not transferred from voter to voter. Industry standard electoral inks contain 10%, 14% or 18% silver nitrate solution, depending on the length of time the mark is required to be visible. The most common methods are via dipping bottles with sponge inserts, bottles with brush applicators, spray bottles, and marker pens.Įlectoral stain typically contains a pigment for instant recognition, a silver nitrate which stains the skin on exposure to ultraviolet light, leaving a mark that is impossible to wash off and is only removed as external skin cells are replaced. Ink may be applied in a variety of ways, depending on circumstance and preference. Ink is normally applied to the left hand index finger, especially to the cuticle where it is almost impossible to remove quickly. 15th Malaysian general election.Įlectoral stain is used as an effective security feature to prevent double voting in elections. A voter's left hand index finger stained with election ink.
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