Using Pastel to Quickly Lay In an Underpainting in Oil

If time is short, or the scene will quickly change, or I want to experiment with underlying color, I will lay in an oil painting using a hard pastel such as a NuPastel and then ‘melt’ the pastel with OMS (Odorless Mineral Spirits). Pastels have the same pigments as any other colored product but the binder is different. OMS will dissolve the binder and allow the pigment to adhere to the canvas whether it is oil or acrylic primed. You can see where I’ve done this in another posts here.

In this painting I was after one major goal….to get the grapes to really glow. I thought the best way to do this would be to lay in the grapes with a color that is analogous to the general hue (color) of the red grapes. I chose a reddish plum because it is in the red family and the lighter, brighter orange would pop against it.

P1090338

In this image you can see the still life I’m going to paint in the upper left corner. The orange pastel is where the lightest part of the grapes will be.

For the green bottle I used a brighter pink as I wanted to dull down the green. I could have used an analogous color such as Cobalt or Cerulean which would have pushed the green better, and I might in a future study.

Notice that I just mass in large blocks of shapes. It’s these large blocks that I will make more specific as I move through the painting. At this stage I want to establish where things will go and their relationship to each other. One thing I ignored in laying in the pastel is the light/dark relationship. In fact, the bottle is darker than the grapes which are, for the most part, a dark middle and a dark value, and the background a light value. The lines that you see in green are compositional lines that I often use to help with the design and to quickly lay in an accurate drawing.

P1090339

I’m starting to lay in the dark dull green of the bottle and in the next photo I’m starting to add the lighter yellowish green elements of the bottle and the background

P1090341

Once I’ve set the value and hue I can start to move on to the grapes. The biggest challenge is getting the grapes to glow. Grapes are semi-translucent and I want to emphasize all the warm rich colors that are in them. One way is by using a green bottle as that is the opposite of red/orange. The other way will be to play warm/cool of the grapes and to add bits of grey. Because grey is so neutral it is a wonderful color that will help the color shine.

P1090346

Im still keeping the grapes rather blocky and loose, only establishing large shapes and light/dark relationships. I’m starting to make more distinctions in the dark areas by adding some darker and cooler spots of color as well as darker and warmer spots of color. Because I want to highlight the warmth and glow of the light part of the grapes I’m making sure to make the darker masses cooler in the area closest to the bright and light section. In the end, the goal is to have it read as true even if it isn’t exactly what my eye might be seeing.

The next step is to start refining the shapes of the grapes and the background. I keep checking through my viewfinder to make sure I’ve not lost my compositional structure and one of those is the triangle shape that is created from where the grapes lay on the ground plane and then start to move up.

P1090349

Finally, I will add any other details that will help the final result….color, temperature, drawing, highlights, and hard/soft edges.

P1090351

If you want to see a time lapse video of this click here.

Advertisements