Great Color : Equipment

Great Color - illustrated by Jon Beebe

Great color comes after investing in great equipment and after establishing a habitual workflow that you are willing to maintain.

A large part of BIG Images value to our customers is our predictable and repeatable processes. However, our process is only as good as the files that we recieve from our customers. And that’s where you come in. Responsibility for great color begins the moment an image is captured. That places quite a burden on our customers to maintain their own workflow for predictable color results. So I offer you these thoughts to help start you off towards a more consistent digital workflow.

First and foremost you have to count the costs. Great color comes after investing in great equipment and after establishing a habitual workflow that you are willing to maintain. While the current state of technology does not give us great color for free there are a few products that can really help… Read the full article...

Adobe RGB vs sRGB

Over the course of the next few months I will be writing about color, offering some insight into what BIG Images likes to see in computer files, and why. This month I am discussing the difference between two color spaces: Adobe RGB and sRGB.

Adobe RGB vs sRGB illustration by Benjamin Lawless

One of the most oft-debated topics I hear (and take part in) regarding color is which color space to use for images. Before I continue, let me just say that I do not intend to answer this question for all time, but I will offer you the opinion of a professional printer, and tell you why I believe as I do.

BIG Images prefers files in the Adobe RGB color space.


Keep in mind that BIG Images is all about getting the best possible print that technology can offer. To do this we need the best possible input into our workflow. Simply put — the more color you give us, the more we can print. This is why BIG Images prefers files in the Adobe RGB color space (there are a few exceptions, but those are beyond the scope of this article). Adobe RGB is simply larger than sRGB, allowing more color information to be stored in an image. To illustrate this I have included a visual comparison of Adobe RGB and sRGB. The white, outer shape, is Adobe RGB and the smaller shape inside it is sRGB. This demonstrates that Adobe RGB is physically larger and can capture more color information than sRGB… Read the full article...

Color Illusions

Apples illustrating color illusions, by Benjamin Lawless

How Color Can Play Tricks With Your Eye

Color is one of those elusive subjects; it is very difficult to communicate precisely. Many variables, from lighting conditions to the surrounding environment to the age of the viewer, have an effect on the way we perceive color. Some variables in particular change the way colors are perceived when prints become large. In this article I show you some visual aids to demonstrate how a color can be perceived differently simply by changing the surroundings.

The Luminance Illusion

Lets start with a simple grayscale example. The image below demonstrates how our perception of depth and shadow effects the way we perceive color. To be more precise, the following illusion will show how the eye perceives the luminance of an object different from the actual luminance values. Press “Play” to reveal the illusion.

The Cornsweet illusion: our eyes perceive the luminance of the top and bottom object as different, when they are actually the same luminance, or brightness.

You will see that the top and bottom grey are actually the same value! This effect is know as the Cornsweet illusion. You can read more about it here at Wikipedia.

Discounting the Illuminate

This next illusion demonstrates how the surrounding lighting environment changes the way we perceive color… Read the full article...

Color Perception and the Human Body

An illustration of color perception, by Benjamin Lawless

Part 1: Color Perception and the Retina

figure1a
figure 1a. Human retina as seen through an opthalmoscope
The retina of the eye is formed by a layer of cells lining the inside of the eye. It is viewable through the pupil of the eye and is the object of interest when an optometrist examines the eye with a light. Along with the many blood vessels running through the layer, two discrete spots are discernible from this vantage point: the fovea and the blind spot, or optic disk (See Figures 1a, b). The fovea is also referred to as the focal point. It is this slightly indented region, containing high concentrations of cone cells, upon which the lens focuses entering light. All other areas of the retina are responsible for the perception of peripheral vision (1. Kolb, 2005, 2. Silverthorn, 1998).

The blind spot gets its name from the fact that, due to the lack of either photoreceptor (rods or cones), it is literally an area of the retina incapable of detecting light. This is the area in which the long axons of ganglion cells, which carry light information from all parts of the retina, converge to form the optic… Read the full article...

Solvent Ink vs Aqueous Ink

“Is it solvent?”


As many of our customers are aware, BIG Images produces prints on huge inkjet printers. In fact, the posters, trade show graphics, banners, and other materials offered by Wide format and Large-format printing companies depend on the same Ink Jet technology found in the office.

Illustration of Solvent Vs Aqueous Ink

The Ink Jet printer is a relatively new phenomenon, replacing dot matrix only 15 to 20 years ago [1] (although the first thermal Ink Jet printer was actually invented in 1977). Two varieties of Ink Jet exist: Thermal and Piezoelectric [2], but ultimately, the principle behind the two are the same; a drop of ink is propelled from the ink head and onto the media at precisely the right time to produce a recognizable image at increasingly impressive speeds.

…a solvent printer is unique in that it heats up the media … leaving the ink embedded in the media!

While the mind tries to wrap around the possibility of such perfect timing, let's focus on what is important when purchasing a BIG image. Interestingly, it's not the manner in which the ink happens to arrive on the media, but the particular solution in which the ink is contained. Anyone who's ever tried to combine oil and water knows that the two just don't mix, because water is a polar molecule while oil is non-polar [3]. Aqueous inks are dissolved in water, a polar substance while solvent inks are dissolved in, well, solvent, a non-polar substance [4]. Paper is polar, plastic is non-polar and this is where it becomes important to the consumer.

Trying to apply a polar-based ink to a non-polar surface or vice versa achieves the same unhappy results Read the full article...

New Ink Solutions Increase BIG Images Color

BIG Images 7 foot wide banner printer for outdoor waterproof banner printing
One of BIG Images' printers - a 7 foot wide banner-printer using new outdoor-inks.

New Inks increase color gamut and image strength.


BIG Images recently completed the conversion to a new ink system for its outdoor solutions. These new inks bring a few direct benefits to our customers. These include:

• Increased color gamut—we can now produce better color encompassing about 15% more of the Pantone color range.
• Better weather resistance—waterproof and lightfast outdoors for up to 5 years.
• Increased strength—the new inks stick to the material better, meaning more scratch resistance and longer life

All of BIG Images outdoor solutions are using this new ink starting immediately.