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Viewing Topic "Alkyd resin"

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Posted By: George O'Hanlon
Total Posts: 2228
Joined Date: Jun 15, 2004

I am not saying alkyds are in general more durable, but evidence indicates they can be as durable as oil paint. There are studies showing some problems, but most of the problems we've seen is due to poor technique rather than the material itself. The biggest mistake made when using alkyds is to ignore that they contain solvents, and solvent evaporation during use alters the alkyd medium or paint such that it may be rendered ineffective at best.

George O'Hanlon Technical Director Natural Pigments
Posted : Feb 19, 2017
Posted By: luccamc
Total Posts: 1
Joined Date: Feb 19, 2017

Hello George, are you saying that alkyds can be more dureable than traditional oil painting materials provided the aritst uses them correctly? Can you outline some of the mistakes that painters make when using alkyds (or give me some references for learning to use alkyds correctly). Thanks

Posted : Feb 19, 2017
Posted By: George O'Hanlon
Total Posts: 2228
Joined Date: Jun 15, 2004

Alkyds are generally good materials in combination with oil painting. They are not without their share of problems as is oil paint, but they can improve some of the properties oil paint films. The biggest problem we have noted is that artists use them incorrectly and therein lies most of the problems associated with their use.

George O'Hanlon Technical Director Natural Pigments
Posted : Jan 31, 2017
Posted By: enthusiast
Total Posts: 63
Joined Date: Mar 13, 2015

There are various opinions about the use of alkyd resin in artist oil painting. Some people like alkyd mediums and use them, others doubt about suitability of this resin. Some say, that alkyd resin can cause problems like cracking or delaminating, there is even paper by Rebecca Ploeger about stability of alkyds (https://repository.si.edu/bitstream/handle/10088/20494/16.Ploeger.SCMC3.Mecklenburg.Web.pdf?sequence=1). On the other hand; many manufacturers offer mediums based on alkyd resin, some offer also alkyd ground (e.g. Gamblin) or linseed oil-alkyd paints (Da Vinci, Gamblin), so maybe it is not that bad material.

George, what is your personal opinion about alkyd resin as a material in artist oil painting? Is it just another useful thing, or does it have some outstanding properties which make it better than other resins or oils? Is it a "medium of future"?

Posted : Jan 31, 2017
Posted By: George O'Hanlon
Total Posts: 2228
Joined Date: Jun 15, 2004

1. What oils are typically used to make this resin (alkyd); linseed, walnut, safflower or also something else?

The fatty acids of coconut, palm, soy, safflower, and less frequently linseed oil are used to make alkyds.

2. Different drying oils (linseed, walnut, safflower, poppy) have different attributes, e.g. drying time, yellowing, strength of paint film, rheology of paint made from certain oil. What about alkyd resins made from various oils? Is there significant difference between them?

Yes, there are significantly different properties derived from the fatty acids of these oils, but more importantly with the process and type of polyhydric alcohols and other ingredients used in the process.

Let's say, that linseed oil is overall the best binder for oil paint. What is the best alkyd resin to use as a binder or a painting medium?

There is no correlation of physical properties with the oil used in the alkyd.

3. Alkyd mediums such as WN Liquin and Schmincke Medium L contain driers and of course dry fast. Kremer 79163 Alkyd resin AM contains siccative and according to Kremer it dries within 1-2 days. Williamsburg Alkyd resin doesn't contain driers and in thin layer it dries within two days. On the other hand, you say, that your Underpainting ransparent base doesn't contain driers, yet it dries very fast as well. This is somewhat confusing; are there alkyd resins which can dry fast even without metallic driers?

This is due to the pigment volume concentration of this medium and the solvent blend.

4. When one is thinking about fat over lean rule, what does alkyd resin have to do with it? Is alkyd resin fat or lean, or maybe more accurately - adding some pure alkyd resin to oil paint or to an oil used as a binder (e.g. 85 % linseed + 15 % alkyd) makes the paint/binder leaner or fatter?

Alkyds count towards 'fat' in the fat-over-lean principle, but this principle inherently flawed and is better replaced by understanding the pigment volume concentration or PVC of the paint. We explain this principle in the Painting Best Practices workshop.

5. As for Natural pigments, will you eventually offer pure alkyd resin or fluid medium based on pure alkyd resin, similar to Liquin, Galkyd or Medium L?

Yes, I am presently developing liquid and thixotropic gel alkyd mediums for oil painting.

George O'Hanlon Technical Director Natural Pigments
Posted : Nov 24, 2016
Posted By: enthusiast
Total Posts: 63
Joined Date: Mar 13, 2015

As far as I know, alkyd resin is basically modified oil. However there are some things that I don't know/understand.

1. What oils are typically used to make this resin; linseed, walnut, safflower or also something else?

2. Different drying oils (linseed, walnut, safflower, poppy) have different attributes, e.g. drying time, yellowing, strength of paint film, rheology of paint made from certain oil. What about alkyd resins made from various oils? Is there significant difference between them?

Let's say, that linseed oil is overall the best binder for oil paint. What is the best alkyd resin to use as a binder or a painting medium?

3. Alkyd mediums such as WN Liquin and Schmincke Medium L contain driers and of course dry fast. Kremer 79163 Alkyd resin AM contains siccative and according to Kremer it dries within 1-2 days. Williamsburg Alkyd resin doesn't contain driers and in thin layer it dries within two days. On the other hand, you say, that your Underpainting ransparent base doesn't contain driers, yet it dries very fast as well. This is somewhat confusing; are there alkyd resins which can dry fast even without metallic driers?

4. When one is thinking about fat over lean rule, what does alkyd resin have to do with it? Is alkyd resin fat or lean, or maybe more accurately - adding some pure alkyd resin to oil paint or to an oil used as a binder (e.g. 85 % linseed + 15 % alkyd) makes the paint/binder leaner or fatter?

5. As for Natural pigments, will you eventually offer pure alkyd resin or fluid medium based on pure alkyd resin, similar to Liquin, Galkyd or Medium L?

Posted : Nov 24, 2016

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