Thursday, July 09, 2015

Grinding Paint

Recently I've become very interested in making some of my own paints and trying out different materials.  Earlier this year I began by experimenting with Rublev's Velasquez medium, calcite in linseed oil, and adding it to dry pigment and making my own oil paint.  see Here
I also add the medium, which is a painting putty, to my purchased tubed paint to create a more luminous paint quality, calcite adds a nice translucency to opaque paint.  I was attracted to using an extender like Calcite after reading about it being a 'colorless' pigment and how it was used by the Old Masters before commercial paints and mediums were processed the way we find them today.  I really like working with just pigment in oil with a little added extender and that's it, it is nothing like working with commercial paints.  Calcite also creates a thixotropic affect and the paint is just luscious.  

Commercial paints contain:
1. pigment
2. brightener
3. filler
4. vehicle (oil)
5. thickener/pigment dispenser
6. driers

That's a lot of stuff!

I've also started researching oils, and how they are processed before becoming the bottled oils available for artists at the local art store.  Linseed oil is heavily processed and loses much of the properties that made it attractive to painters prior to the 20th century.  That is when commercial processing changed the oil into the yellowing, slow drying medium that it is today.  Refining oils reduces the impurities and fatty acids, but overly processed oil loses all the behaviors that contributed to the painterly effects of the masters.  By hand processing the oil, using methods of the past to wash the oils of impurities, you create a product that is non yellowing and faster drying, and also dries to a harder paint film.  There are methods for taking organic, cold pressed flax oil and hand washing it yourself, but I chose to buy this Linseed oil from The Art Treehouse, it begins as a cold pressed, unrefined Flax oil and is water washed using traditional methods.  

In the photo above you can see the start of my own putty medium using the water washed linseed oil and calcite.  It is amazing!  It is gelatinous, viscous, and smooths out completely after being agitated.  Watch my video to see the thixotropic behavior as it settles out after being mixed, it's completely solid when you let it sit for a bit, yet will pool and ribbon when stirred.  This also affects the paints rheology, which is the way a liquid flows.

putty medium

 Grinding pigment

 a full day's work

I really loved the quality of my last batch of homemade oil paints, I'm excited to try out this new batch with the water washed oil and also using my own putty medium.  

In the meantime, I'm enjoying this reading,  this little book contains writings by well known artists and reflections on painting from Fra Angelico, Da Vinci, Velasquez, to van Gogh, Robert Henri, Andrew Wyeth and beyond...  it is a great look into painting through the artist's eyes throughout history, very insightful.

My studio, Happy painting!