Click the picture to read the notes.
#2- Dammar and wax dries faster without wax.
#3- Bees wax
#10- Grumbacher Gel
#11- Grumbacher III
#12- Cold Pressed linseed oil
#13- Cold pressed linseed oil plus Dammar
#14- Windburg pre-mix
#15- 2 parts Stand oil, 1/8 Venetian balsam, 1/8 Raw Cold pressed linseed, no drier added
Here is the meanest yellowing agent on the block. Cobalt Drier.
EGG AND OIL MEDIUM
1, 2, 3, 4
#1a-(top left corner, 1st sm column) egg yolk,
#5-(blue paint, Bottom Row, 1st column) Egg yolk and oil paint, very fast setting.
This test is from 4-4-00
The picture was shot in the bright sunlight.
Rather than darkening the background I lettered the samples
That's W/N Raw cold pressed linseed oil on the top left "A",
Kramer raw is about the same color.
That's pretty scary ..
Anyway, Damar, Damar/Wax, Polyurethane and Gamvar Varnish are clear.
Galkyd Alkyd and Venetian Balsam did well.
B is Wax left and Damar right, both clear in 2013
The sundried was almost clear in the jar and still is today.
Washing linseed oil.
Ron L. asked me today about the oil tests.
I just opened the test book, it's been mostly closed for 8 years. The 12oilyellow has not darkened enough to matter. The lightest medium is still 1damar:1/4wax and pure wax, Venetian balsam. poppy oil, cold pressed and damar. The next darkest is Grumbacher lll.
On the page with the W/N raw (A), it has gotten darker, Graham walnut alkyd is as dark as W/N raw was in 2000 (J). Stand oil (M) has almost caught up in darkness to Graham's walnut alkyd junk (J). I don't like that company, they sold me some dry PR:122 magenta and it turned brown in lime, 100% fake. Sennelier's PR:122 is still beautiful. Gamar alykd (E) is doing almost as well as damar. That surprised me, IT'S THE MOST NONE YELLOWING OIL OF ALL. ! And since I like the speed of alykd I'm going to use it more often. Shiva damar (I) failed completely, make your own damar all the time. Gamar varnish (F) is as clear as damar.
Cobalt drier.. 1 drop in a mixture (didn't mark down the drying speed) 2 drops dry in 2 hours, 10 drops dry in 45 minutes. All are dark, 10 drops not much darker than 1 drop. Cobalt drier darkens more than oil.
These media tests were painted in 1994, they reinforce the 1995 and 2000 media ageing tests
The below list of materials aged, from the clearest to yellow.
Bee's Wax, has no grab or bite and is very
smooth blending. (B)
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