Posts Tagged ‘color difference’

Run Numbers Running Wild – Not Acceptable

April 4, 2018


For this job, the vendor sent FOUR different run numbers, plus two bolts that had no run numbers at all. It all had to be sent back and exchanged for new paper – all in the same run, please!

Run numbers are very important. When wallpaper is printed, each batch is marked with a run number. The next time the manufacturer makes a batch of wallpaper, a new vat of ink will be mixed up, and it will be an ever-so-slightly different shade from that which was used before. So that new batch of wallpaper will be given a new run number.

These color differences are minor – but if they are placed next to each other on a wall, you will have a very noticeable color change from one strip to the next. In the second photo, you can probably see the difference in color between the red flowers, and maybe even the green and brown foliage.

In the third photo, a smaller rectangle of the wallpaper pattern has been placed on top of a larger rectangle. All around the perimeter, you can see a slight color difference between the reds, greens, nad browns.

But it’s important to realize that the background will also be of a slightly different shade.

When two strips of two different runs are placed next to one another on a wall, the shade difference will be obvious in the form of a floor-to-ceiling slight-but-noticeable color difference. https://wallpaperlady.wordpress.com/2016/07/19/two-runs-are-not-fun/

It’s possible to work with this, by “breaking” the runs in a corner. But this uses up a lot more paper, and it’s too complicated to explain here.

This wallpaper was bought from an on-line mass-marketer. I like the quality of their products. But they seem to have no clue of how wallpaper works, and the customer service person had no grasp of what a run number was or why it mattered. From a vendor like this, you can pretty much expect that they have a bunch of stock shoved into shelves in the warehouse, and when someone buys some, a worker just goes out and pulls any old rolls from the stack, willy-nilly, with no regard to run number, damaged goods, and may not even check to ensure they are all the same product number – A coupla months ago, I got the same pattern but in two different colorways.

The bottom line is, buy your paper from a reputable source, check the run numbers when the paper arrives, and, if necessary, keep separate runs on separate walls.

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Color Difference Due To Fading Over The Years

January 24, 2018


I hung this original paper more than 15 years ago. Some areas had become stained, so I was called to fix it. Luckily, the homeowner had saved the left over paper, so there was enough to replace the damaged strips.

You can see a slight difference in color between the strip on the left, which was hung 15 years ago and has been exposed to light all that time, and the strip on the right, which has been stored in a dark closet until I put it up today.

Two Runs? Three Runs? Either One Is A Bad Deal

January 1, 2018


The client bought her paper on-line, before I saw the job and measured the space. Like most homeowners, she ordered too little paper. I told her to get another double roll.

The new roll was a different run number. In the photo, you see one is Batch 15, and one is Batch 16. And the label on the third double roll has been removed and discarded, so we have no way of knowing what batch that one is.

The problem is that each batch of wallpaper that gets printed will be ever so slightly a different color from every other batch. Not a problem if you can keep the different runs (batches) on separate walls. But if you have to put strips from different runs next to each other on the same wall, which is 95% of the time, you are likely to see a slight difference in color. This will make your wall look like it’s striped. Not good.

Buying wallpaper on-line can be cheaper and fast, but since people at the company are order-takers and are not wallpaper-savvy, there is noone checking things like run numbers. This is why I encourage clients to buy locally.

In my “Where To Buy Wallpaper” link on the right side of this page, I name several places where people really understand wallpaper, and so you can shop without having to worry about issues like run numbers.

Two Runs Are Not Fun

July 19, 2016
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When I first consulted with this client, she had already bought some wallpaper – but she did not have enough to cover her wall. (Note to homeowners – always have the space measured by a professional before you order your paper.) So she ordered more – but the new paper that arrived was from a run different from what she already had.

“Run” or “batch” numbers refer to when a batch of wallpaper was printed. Wallpaper printed at different times, and of different runs, will be slightly different in color.

This slight color difference is what you see in the second photo, the thin strip at the left of the pic. Even if the difference is minute, full length strips side-by-side on the same wall can be quite noticeable.

So, if you find yourself stuck with having to use different runs of wallpaper, you can disguise the color difference by “breaking” the runs in a corner…Because light hits the walls differently from one wall to the next, you won’t notice a slight color difference when the two different runs are on two different walls. However, it takes a bit more paper to do this. So, if you are dealing with two different runs, be sure to order one or two extra double-rolls of paper.

Same Grasscloth; Different Colors

November 15, 2015
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The grasscloth on the right was bought a year or so ago. It was left over and the homeowners wanted to use it on a new project. They needed additional paper to do the space, and so ordered a new bolt of paper. As you can see, there is a noticeable difference in color and texture between the two bolts, manufactured at different times. This is known as “run number” or “dye lot.”

It is also called “shading” and “paneling,” which refers to the difference in color between strips on the same wall. I had enough paper to cut all my strips from the new bolt, so there was minimal color difference on this project.

Another Example of Paneling in Grasscloth

July 2, 2015
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This finely textured grasscloth is by Phillip Jeffries, a fairly high-end brand. All the bolts were the same run number. Yet, as you can see, there is a noticeable color difference between strips. This is called paneling. Here – short strips, under and above the windows, somewhat obscured by drapes – it’s not too noticeable. But imagine if you had 9′ strips next to each other on a wide wall, with this color difference.

This is not considered a defect (and the manufacturer will not replace the wallpaper). This is normal, and it’s considered part of the “inherent beauty of the natural product.”