Solvent dye - Wikipedia
Solvent dye - Wikipedia
A solvent dye is a dye soluble in organic solvents. It is usually used as a solution in an organic solvent. [1]
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Solvent dyes are used to color organic solvents, hydrocarbon fuels, waxes, lubricants, plastics, and other hydrocarbon-based nonpolar materials. Fuel dyes are one use of solvent dyes. Their molecules are typically nonpolar or little polar, and they do not undergo ionization. They are insoluble in water. They form a colloidal solution in solvents. They have poor (basic dyes) to good (metal complex based) light fastness.
Solvent dyes are used for gold imitation (and other transparent metallic effects) of metallized polyester films. Also used in marking inks, inkjet inks, glass coloration, and so on.
Names of solvent dyes are often generic, of the scheme "solvent
Dyes - Solvent v Waterbased? - Identity Leathercraft
Author: Dr Peter Laight
Have you ever wondered about the different types of dyes and pigment stains? Why some are dissolved in solvent and others in water?
What are the different properties of the leather during and after dyeing?
This deals with the water versus solvent question, in the following we will look at dyes versus stains.
Dyes used in leathercraft have been developed to predominantly colour vegetable tanned leather, although the stronger more aggressive types work also on chrome leather.
Modern dyes and pigments are synthetic chemicals developed over the past 100 years. All are based on carbon in various formations with significantly different structures and reaction groups. All have to be dissolved and suspended in liquid for application to the leather. In most cases this is done by the dye manufacturers although powder dyes can still be obtained and are used by
Most craft dyes are sold in small 115 or 125ml or 1 litre bottles, with the dye or stain ready to be applied directly or to the leather by padding or spraying.
Types of Dye and Pigment
There are over ten different chemicals structures of dye, each developed for different purposes and materials. The following are predominantly used in leather dyeing:
Category
Used in:
Solvent used:
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C1 Basic Dyes
Fiebing’s Leather Dyes
Solvent Based –2-(2-ethoxyethoxy) ethanol, ethanol, isopropanol
C1 Solvent Dye(uz,es,hi)s
Fiebing’s Pro Dyes
Denatured alcohol, isopropanol, xylene, 2-(2-ethoxyethoxy)
Acid Dyes
Tandy Eco-Flo Leather Dyes
De-ionised water
C1 Pigment (various colours)
Identity Water Based Leather Stains
De-ionised water, vinyl acrylic co-polymer, propylene glycol
In this article we are concentrating on the differences between water and organic solvent use. Other differences can be caused by type of dye stuff and pre and post application treatments.
On application by dabbing/spraying the liquid both penetrates and ‘reacts’ with the leather. The amount and evenness of application influencing both levelness and penetration. Organic solvents have the ability to disperse fats on the surface or slightly beneath. This can aid penetration specifically of dyestuffs. Levelness and penetration are also influenced by the PH of the leather. This is largely ignored in veg craft applications as the variations in PH are not judged as significant. (More of this in articles to follow.)
The reaction of the dyestuff molecule with the leather fibre also depends on how quickly the fibre “wets”; a solvent medium can enhance this endeavour. There is the danger of reacting too quickly before the spreading has occurred, which can cause unevenness. Experimentation is necessary to compare results.