Why Does It Matter If My Paint Is Transparent Or Opaque…As Long As I Like The Color?

Knowing a paint’s attributes puts you a step ahead as an artist. By being familiar with whether a pigment is transparent or opaque, staining or non-staining, saturated or unsaturated, for instance, you will begin to be able to predict how the paint will behave. Understanding your pigments is an important step in getting the results you want and in being successful as a painter.

TRANSPARENT VS. OPAQUE:

A TRANSPARENT color maintains its luminosity or brightness because it allows the white of the watercolor paper to reflect back through the paint to the viewer’s eye. Since a transparent color lets light through, it is possible to create the illusion of a ‘glow’ of light in a painting.

 

Apple blossoms.jpg

Apple Blossoms – You can see the first layers of color through the transparent pigments.

In contrast, an OPAQUE watercolor pigment blocks the light and prevents luminosity. While thinning an opaque color can make it somewhat more transparent, it will then lose intensity (strength). In general, you cannot see the white of the paper through an opaque paint. The more opaque a color is, the more it blocks the white of the paper, particularly if it is layered.

STAINING VS. NON-STAINING TRANSPARENTS:

If you plan to glaze one color on top of another color to create optical color mixing, use transparent colors. If you want to create the effects of light and produce a ‘glow’, use a paled, transparent color.

Be aware that there are both STAINING and NON-STAINING transparent colors.

STAINING TRANSPARENT pigments, such as Indian yellow, Phthalo/Winsor Blue, Phthalo/Winsor Green, Prussian Blue/AntwerpBlue, Phthalo Violet, are bold and intense. They are NOT easily lifted. Because they are transparent, they will NOT produce mud IF mixed with other transparent  colors. Mixed full strength, they create rich darks.

NON-STAINING TRANSPARENT pigments, such as Permanent Rose, Aureolin Yellow, Viridian, or Cobalt Blue, on the other hand, are delicate and can be lifted easily. They are ideal for glazing, layering, or mixing a transparent gray from primary colors.

Still other pigments, like Lemon Yellow, Gamboge, Quinacridone Rose, Cobalt Violet, Sap Green, or Ultramarine Blue, are LOW-STAINING and transparent to semi-transparent. Intensity of these colors is average, and they can be partially lifted.

If you wish to lift one color of a mixture and reveal a second color underneath (e.g. by blotting out clouds or scraping paint back to create rock texture or a tree trunk), then combine a staining pigment with a non-staining pigment.

Stormy Hills.jpg

Stormy Hills – Opaque pigments do not allow earlier color layers to show through.

OPAQUE colors tend to be less bright, although semi-opaque pigments, such as Cadmium Red, Cadmium Orange, Cadmium Yellow, or Cadmium Lemon, can be somewhat luminous when thinned or diluted. The opaque earth colors, like Indian Red, Light Red, Yellow Ochre, Burnt Umber, Sepia, Indigo, or Cerulean Blue, are often LOW-STAINING and UNSATURATED (not a vivid bright). Burnt Sienna and Raw Sienna, earth colors, are a bit unusual in that they can be transparent. Remember that adding an opaque color to a paint mixture or layering with an opaque pigment will make creating ‘muddy’ color more likely. Further, if you begin a painting with opaque color, you’ll probably lose the effect of light.

CREATE A COLOR CHART TO DETERMINE TRANSPARENCY:

Transparency and opaqueness of paint pigments can vary quite a bit by manufacturer. For example, Raw Sienna ranges from yellow to orange to brown depending on the company that formulates it. So, get to know the specific paints YOU have on your palette by creating a color chart. First, draw a line with a black permanent marker (or waterproof India ink). Allow to dry. Paint swatches of medium dark paint over the black line. Transparent colors won’t cover the black line. Opaque colors will. Staining colors will look dark.

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Two Color Chart examples.

IN SUMMARY:

Most organic or synthetic paints are transparent, while earth colors tend to be semi-opaque or opaque. The transparent pigments are the most versatile type of watercolor. They remain transparent when mixed with other transparent colors. Opaque colors, on the other hand, DO NOT mix well with other opaques. Try to combine opaque paints only with a transparent color or colors, if possible, to avoid mixing muddy colors. Or, best of all, use an opaque pigment by itself to show off its best attributes.

Get to know the paints on your palette. As Jean Dobie states in Making Color Sing, “To paint glowing, vibrant watercolors, you must become familiar with your pigments’ personalities.”

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Why Did I Change My Palette Colors?

For many years, I used the colors and brands of watercolor paint that my instructors used. (Interestingly, each instructor had different preferences.) There were so many different colors to choose from I was unsure why they used some colors and not others. I didn’t worry too much about their color choices when I was just starting to paint, being more focused on learning technique, but as I gained experience, I wanted to understand why we used those particular colors. Was it just a matter of personal preference, or were certain colors better for some reason? Why?

LEARNING ABOUT COLORS.

‘Color’ became more and more interesting to me. I became fascinated by how many different ways there were to mix colors from the paint that was already on my palette. There was such variety! Yet at some point, I began to feel some dissatisfaction with certain black, gray, and green paints straight from the tube, and began to prefer my own mixtures. Unlike blends that I created from mixtures of often primary colors, some of these tube paints began to appear dull, flat, uninteresting, and lifeless to me. Other tube paints looked stark, strident, unnatural and out of place in certain pictures. What a revelation! I began to notice details that I had not been aware of before. And I was starting to feel unhappy with a few of the colors on my palette.

QUESTIONS.

Why did some paints, like some of the reds, greens, and browns, look so flat and dull?  Everyone talks about ‘Transparent Watercolor,’ but what is it exactly? Are all watercolors transparent? And why is transparency important? How are opaque colors different from transparent colors? Where does the elusive ‘glow’ or luminescence of watercolor come from? Is it in certain pigments, or does it result from how the paint is applied? I decided to try to make my paintings glow!

As I studied and experimented, I learned more about the characteristics of pigments and how they behave. The issues were confusing! Some paints worked well in certain situations but not in others. Some colors mixed cleanly with others, but similar-appearing colors, when mixed with another color, turned into mud! Ugh! I realized that all watercolor pigments are NOT transparent or equal in intensity. All blues are not interchangeable. In fact, sometimes tubes of paint with the same name do not even contain the same pigments! How could one expect them to behave the same? And, further, some tube paints are not made from a single pigment but are mixtures of a number of pigments, each of which  has its own characteristics.

HOW NOT TO MAKE ‘MUD’!

Jeanne Dobie, in Making Color Sing, describes how she makes vibrant, glowing color. She recommends transparent and pure color pigments as a base for your palette colors. To capture the ‘effect of light’ in watercolor, use transparent and single ingredient pigments! Jeanne says, “Because transparent colors permit the greatest amount of light to pass through to the paper, reflecting back to the viewer, they impart luminosity. Moreover, they remain transparent when mixed together – so there’s no mud!.. If you begin a watercolor with opaque pigments, you’ll lose the effect of light. Opaque pigments are denser and heavier, which greatly reduces the amount of light transmitted through to the paper. Because of this ‘thickness,’ an opaque pigment does not mix well with another opaque color. It only becomes thicker! If you mix two opaque pigments together, you are flirting with a muddy mixture. Should you mix three opaque pigments together, the result may be too lifeless to call a watercolor.”

WATERCOLOR INGREDIENTS.

Watercolor pigments are composed of several different types of materials. First, some pigments are made of ground MINERALS or EARTH. These have a tendency to float on the surface of the paper, whether transparent or not, and so may NOT be very good for mixing. (I think it is interesting that some mineral pigments are quite transparent — for example, genuine ultramarine blue, burnt sienna, raw sienna, cobalt blue, viridian, and manganese blue.) Second, some pigments are ORGANIC DYES. Third, other pigments are SYNTHETIC DYES. The dye pigments are NOT all transparent as one might expect, because some are combined with various fillers.

MY PALETTE COLOR CHANGES.

Gradually, I have added more transparent primary colors (red, yellow, blue) to my palette and reduced the number of opaque pigments. I have tried to find transparent colors made from a single pigment (i.e. ‘pure’, as Jeanne Dobie describes). I now have a wide variety of  transparent red, yellow, and blue primaries which can be mixed into numerous clear variations. I chose each paint for a particular quality; while some are very similar, no two are exactly alike.

On my palette, I continue to keep some additional “occasional use” colors that are opaque, such as cerulean blue, cadmium red, Winsor Newton Payne’s gray, and burnt umber. Many greens I mix from primary colors, but I have a few transparent greens on my palette. I removed any ochres and use burnt umber with care, as they are opaque. I like the siennas because they are transparent or semi-transparent, depending on how diluted the mixed wash is. While the above earth colors look beautiful when wet, they do seem to lose their richness as they dry, appearing flat and somewhat dull. (I plan to discuss the specific colors that I have on my palette in a later blog. Stay tuned!)

GLAZING.

Jeanne Dobie also maintains that selecting pure transparent pigments is just the start. An artist needs to learn about color relationships to use the colors successfully – color mixing could be the subject of yet another, later blog post, perhaps. And, yet, there is also a place for the opaque colors on your palette. “To complement the pretty (transparent) colors” and to enhance their jewel-like tones, you need to use more subtle, “non-brilliant mixtures.”  Thus, my first discovery in the search for “GLOW” was that the glow begins with the use of transparent colors.

The second part of creating glow in a painting seems to be related to a technique called GLAZING. Most watercolor painters are aware that it is possible to paint one wash over another, a process called glazing. (The secret is to apply each wash, usually the lightest color first, to a THOROUGHLY DRY sheet of paper.) Now why would a painter want to do this? It seems like a lot of trouble! Is it worth it?

Yes, properly applied, layers of washes are what actually produce the characteristic GLOW of watercolor and a stained-glass effect that cannot be achieved by any other means. To achieve the much sought after GLOW FROM WITHIN in watercolor, an artist glazes layers of mostly transparent pigments. Pigments applied in glazes have MORE luminosity than the same colors mixed on the palette and applied in a single wash!

Once you have practiced your wash techniques and feel you are a bit proficient at them, here is the procedure for glazing:     1. Develop your glazes from transparent watercolors (eg. Indian yellow or Hansa yellow light, Winsor blue or Phthalo blue, Winsor red or pyrrol red).     2. Begin with your lightest pigment, usually a yellow.     3. Keep your washes DILUTED and transparent.     4. Make sure, VERY SURE, that all previous washes are COMPLETELY dry before a new wash or glaze is applied.     5. Use the most opaque paints toward the final stages of your painting. Using them in the initial stages runs the risk of creating mud or chalky washes. (I must give credit here to Don Rankin, who, in his book Mastering Glazing Techniques In Watercolor, gives these clear and simple ground rules for glazing.)

IN SUMMARY.

I now have more transparent pigments in my palette, fewer of the opaques. I try to employ the glazing technique with transparent color more often than I previously did. I like the effect! If you too are a painter who strives to find a way to have your work ‘glow from within,’ try what I have described above. See what you think, and let me know.