Originally Posted by redgreen
I was thinking of replacing some of my Cadmium colours and was wondering if it is worthwhile to get cadmiums without Barium.
The cadmiums in my 20 year old tubes seem chalky and stiff but perhaps that is because of the age and not the paint.
I'm so far quite happy with Hansa Yellow Med as a replacement for Cad Yellow Med. (it's quite opaque) but the Hansa Yellow lights/lemon are not light fast.
The Napthol red's are too transparent and don't seem to replace Cadmium Red light.
Hi Redgreen, btw, compliments on your name!
As has been stated above, some accomplished folks use these, and they are nice paints. For most purposes they are very similar to those paints that do not contain the barium. If you are wondering about an exception, out of curiosity, lets look at cadmium barium red light. Compare this, for example to something such as genuine vermilion. If we lay out a paint nut of vermilion, and one of cadmium red light, they will (depending on brands) look very similar. If we then mix an equal amount of ivory black into each red paint nut, we will see how differently they behave. The ivory black mixed with genuine vermilion will resemble something similar to a dark red earth color. Very similar results with cadmium red light (without barium). The ivory black mixed with cadmium barium red light, will look like a reddish gray. This is due to the fact that barium is a white, and was coprecipitated to jack up the value, without creating as much effect as some of the other whites would, in terms of chroma. This is all to mimic the higher values associated with the single pigment versions.
However, for the most part, it would be wasteful to mix black with genuine vermilion, or cadmium red light, to obtain something akin to an earth color, so those colors are very useful for final high value high chroma scumbles. In that capacity, the cadmium barium red light, will behave almost the same, and can be considered to be more lightfast than vermilion. Equally as lightfast as cadmium red light, yet less expensive.