Posts Tagged ‘color difference’

Foliage Update for Guest Bedroom

November 10, 2021
This small floral print was fashionable when it went up, 30+ years ago. But now it’s dated, and also some stains and dirt are showing. Time for an update!
Old paper has been stripped off, the walls have been primed with my favorite Roman Pro 977 Ultra Prime, and ready for wallpaper.
Done! An accent of grasscloth was used on one wall. I love the way the greens match, and everything coordinates with the paneling / wainscoting.
Usually I place the pattern so a prominent design motif sits at the ceiling line. But in a room with wainscoting or chair rail, that horizontal mid point in the wall is more visible. So I plotted to have the bottom of the dark green, most visible flower land just above the top of the chair rail. It looks like it’s growing from the wood! The pattern also just happened to land nicely at the ceiling line, with no major design elements getting cut in half.
The material has woven fabric look to it – but that’s just the printing. It’s actually a very flat paper. It was very thin, and reminded me of papers from decades ago. It hugs the wall very tightly. I liked it a lot.
Exclusive Wallcoverings
The grasscloth accent wall. All four strips were reverse-hung, and hung in the sequence they came off the bolt. Yet you see a color difference (called paneling or shading ) between some strips. This is quite typical of natural products like grasscloth and sisal.
Close up. Bad photo … the color is actually an attractive green. The material is more of a thin balsa wood about 1/2″ wide, rather than traditional grass or reeds. I feared it would be difficult to cut through, but it turned out to work very nicely. But it would not have been good in a room with corners or intricate details to trim around.

The home is in League City, a southern suburb of Houston.

Shading Issues With Hourglass Wallpaper

October 30, 2021
There is a vertical seam down the center of this picture. Look closely, and you will see that the strip of wallpaper on the right is darker than the strip on the left. The manufacturer didn’t keep the color of the ink consistent across the width of the paper. This is called shading or paneling. Even though the pattern of the horizontal hash-type lines matches across the seam, I thought the difference in color would be jarring to the eye.
In the grand scheme of things, I believe that uniform color would be more important than a perfectly matched really tiny pattern. So I used a trick called reverse-hanging to bring an even color to the seam areas. That’s when you hang one strip right side up, and then hang the next strip upside down. What this accomplishes is to place the same side of the strip next to itself. That way, a darker area, for example, is next to a darker area, and your eye doesn’t notice any abrupt color difference. It’s a simple concept, but difficult to explain. This technique is usually used on solid textures or materials like grasscloth. I was able to get away with it on this patterned paper because the design was symmetrical whether it was right-side-up or up-side-down. From a short foot away from the wall, you can’t notice that the horizontal lines don’t line up perfectly.

Run Numbers – Re Previous Post

May 15, 2021
Run numbers are important!

Re my previous post, before I visited, the homeowner had purchased 8 rolls (4 double roll bolts) of paper. This was just exactly enough (12 strips) for the headboard wall, but I told him to order 16 more to do the rest of the room. The new paper came in a different run. So we had Run 16 for the headboard accent wall, and Run 17 for the other walls.

(You can’t mix runs on the same wall, because different runs, printed at different times with different batches of ink, will be slightly different shades. This very slight color difference will show up on the wall as a striped or “paneled” effect.)

The wallpaper is by York. It is a non-woven material, comprised of synthetic fibers rather than wood and cotton. The synthetic material does not expand when wet with paste, which means the wallpaper can be hung via the paste-the-wall method, with no “booking” or “soaking” wait time needed.

Interestingly enough, Run 16 behaved differently from Run 17. I hung the accent wall with Run 16 quite successfully using the paste-the-wall method.

But when I started the next wall using Run 17, bubbles and wrinkles developed. The paper was absorbing moisture from the paste and expanding on the wall, creating the small bubbles. Quite unexpected with a non-woven material.

The solution was to paste the back of the wallpaper, rather than the wall. This allows the material to absorb moisture and expand a tad before you get it to the wall, so it will behave itself once it is on that wall.

Unlike a traditional paper, this non-woven material did not need a lot of time to absorb moisture, but could be pasted and hung immediately. This greatly speeds up the installation process.

Pasting the paper has an additional advantage in that it renders the material more supple and pliable, which makes it much easier to work around corners or manipulate into position in tricky areas.

Shading, Irregular Strings, Bubbles – Disappointments in Walquest Faux Grasscloth

April 18, 2021
Look dead-center – the strip on the right is slightly darker than the strip on the left (Effect shows up better in person than in photos). We call this shading, or paneling. Even though the pattern can be matched from strip to strip, which eliminates the eye-jarring break in the design at every seam which you get with real grasscloth, I am disappointed that Walquest allows this color difference. I’ve noticed it on each of their colorways. It is less noticeable on this light version, but is readily apparent in their darker colorways.
At the right edge of a strip of faux grasscloth wallpaper (center in the photo), a string either didn’t get put in place, or was pushed too far to the side. Either way, when this strip on the left is butted up against the next strip to the right , this “missing string” creates a very obvious void area, which runs vertically for about 4.’

I have long loved this Walquest alternative to grasscloth, because it has the texture that clients are seeking these days. But it sidesteps many of the problems with real grasscloth. Because it has a pattern that can be matched from seam-to-seam, so you don’t get the visible breaks in the reeds at every seam as with real grasscloth. And because it’s man-made, so the color is more uniform, reducing the color differences between strips that is prevalent with real grasscloth. (Do a Search here (upper right corner) to learn more.)

Unfortunately, I am becoming disenchanted with this product. The last several times I’ve worked with it, there have been color differences (shading / paneling) between strips. And a couple of times, I’ve had issues with strings not being uniformly placed across the strips.

Fixing Weird Things That Happen To Wallpaper

December 6, 2020

The top photo shows a stain on the wallpaper that is probably related to a rain or hurricane event a few years ago.

Water stains (and also other substances, like rust, blood, ink, oil, tobacco, tar, cosmetics, and more) will bleed through wallpaper. So, before patching the area, it is imperative to use a stain blocker to seal the problem. My favorite is KILZ Original oil-based.

KILZ will seal off the stain all right. But wallpaper won’t stick to it. So, in the third photo, you see where I have primed over the KILZ with a wallpaper primer (tinted light blue, for visibility). It’s not necessary to prime the entire wall area to be patched, because this type of wallpaper will stick to itself with just plain old adhesive.

The striped pattern made for an easy repair. I took a straightedge and sharp razor blade and trimmed along the striped design, creating a long skinny patch. See fourth photo. You can also see the strip pasted and booked (folded pasted-side-to-pasted-side).

Once that sat and relaxed for a few minutes, I took it to the wall and appliqu├ęd it over the damaged area, going the full height.

There was a very slight color difference between the paper that had been on the wall for 20 years and the paper that had been in a dark closet. Had I placed the white area of the patch next to the white area on the existing paper on the wall, the color difference would have been noticeable. But trimming along the blue stripe gave the eye a logical stopping point, and so the color difference is not detectable.

In the finished photo, you would never guess there had been anything amiss with this wall.

I used this same technique to patch over the bug-bite holes in yesterday’s post.

And another good reminder that it’s always best to order a little extra wallpaper, in case of the need for repairs later. Store the paper in a climate-controlled space … not the garage or attic.

The wallpaper is by Schumacher, and appeared to be an old-school pulp paper material.

Same Run? Different Color?

July 18, 2019


Top photo. Look carefully. You are looking at the start of a printing run on two separate bolts of paper. On the bolt to the left, the color looks pretty uniform.

But on the bolt to the right, you can see a horizontal line where the background has been colored. It’s faint, so look closely. In addition, you can definitely see that the paper on the right is darker than the paper on the left.

If there were more fish present, you would also see that on the right, the greys are a little darker and the reds are a little stronger. There are also more brown speckles in the background of the grasscloth on the right.

What happened was, too little paper was ordered (a simple mix-up between rolls and yards), and so more had to be ordered, and then custom-printed.

The interior designer stressed to the manufacturer that the new paper had to be the same run number (all bolts printed at the same time out of the same batch of ink). The manufacturer’s reply was that their precision printing and ink-mixing was such that there would be virtually no difference in color between what we had already, and what they would print fresh and send to us.

As you can see, that is not the case. Although these differences are minor, if strips from these two bolts were placed next to one another on the wall, the color difference would be pretty noticeable.

So, accommodating for this color difference, we lost about three yards of (expensive) wallpaper.

Run Numbers Are Important

April 14, 2019


I hung two wallpapers today, both from Anthropologie, and in both cases, the homeowner measured and purchased paper before I had measured and figured how much to buy. In both cases, they were a double roll short. I told them that when they ordered the extra double roll, to be sure to ask for the same run number as the rolls they already had.

Unfortunately, in both instances, Anthropologie sent a different run. Probably, the guy in the warehouse didn’t get the message from the people in the order department, so he just pulled any old bolt of paper off the shelf.

Run numbers DO make a difference. As you can see in the second photo, the butterflies are clearly different colors. And in the third photo, the color difference (red flower, brown leaf) is less dramatic, but still noticeable. The white background is probably a slightly different color, too. If these strips were placed next to each other on the same wall, you would notice an abrupt color difference the full height of the wall.

So it’s important to make sure that all your bolts of wallpaper are of the same run number.

Run number, also called batch number or dye lot, refers to rolls that were all printed at the same time. The next time the manufacturer is ready to print up that pattern, he will mix up a new batch of ink – but that batch might be a slightly different shade than what was printed previously.

Because these color differences will be noticeable on the wall, it’s important that they not be used next to each other. You can use different runs on separate walls, but not on the same wall. If you are forced to use broken runs, as they are called, you’ll need to buy a little extra paper, because there will be more waste as you switch from one run to the other.

Different Runs

February 8, 2019


Look at the center of the photo. See that slight color difference between the strip on the left and the strip on the right? This is most likely due to the two strips coming from two different run numbers. These can also be called batch numbers or dye lots.

This means that all paper that is printed from one batch of ink is given a run number. Three months later, when the manufacturer is ready to print another lot of wallpaper, a new pot of ink is mixed up. Chances are that that new kettle of ink won’t be exactly-dactly the very same shade as what was used previously.

This means that the two batches of wallpaper will be ever so slightly different in color. If strips of paper from the two different runs are put on the wall next to each other, you will notice the color difference. So each batch of ink, and the paper that is printed with it, is given a run number.

That way, the installer can be sure that all the wallpaper for his job will be printed at the same time, of the same run number, and all the same shade.

Checking for run number is the first thing every installer should do, before starting to hang wallpaper. In fact, in my “how to prepare for install day” info pack, I ask my clients to check to be sure all bolts are of the same run number. That way, if there is a problem, there will be time to return the bolts and get new paper that is all of the same dye lot.

If you end up with a broken run (two or more different run numbers), it is possible to use the paper, but you have to keep the different runs on separate walls… your eye will not notice a subtle color difference if the papers are on different walls. But this uses up a lot more paper.

Stretching the Paper to Avoid a Pattern Mismatch / Color Shading in Grasscloth

October 28, 2018


Two things about this photo. First, you can easily see the color difference between the narrow panel on the left, and the one to its right. You can also see that the color of the grasscloth darkens 2/3 of the way down the middle strip.

This variation in color is normal – even expected – in grasscloth, and is called “shading,” or “paneling.” It’s referred to as the “inherent beauty of this natural product.” But, personally, I don’t care for it.

Read my informative page to the right, to learn more about grasscloth.

Another thing to note … this corner is the last corner in the room to be papered. Virtually always, this last corner ends in a pattern mis-match – which can jar the eyes. So I placed it up over the door, in the least conspicuous space I could find.

Indeed, since the distance between the motif on the final strip did not sync with that on the first strip, the pattern was going to end up with a floral stem being split in the corner, leaving half of the greenery visible and half cut off. I didn’t want any cut off flower stems.

So I “grew” the paper. The distance between the flowers was supposed to be 5″. I used some scraps of paper to cut a strip 3.5″ wide, and another 4″ wide. This gave me an expansion of 7.5″ – wide enough to bridge the final distance without cutting off any flowers, but not wide enough for the eye to detect that the spacing was not exactly as the artist originally plotted.

The pattern is “Acanthus” and the manufacturer is Schumacher.

Slight Color Difference

June 4, 2018


Look closely, just to the left of center, and you will see that the strip on the left is slightly darker than the strip on the right. This is called shading, and is because, in this case, the left side of the wallpaper is a slightly darker color than the right side. Therefore, when two strips of paper are butted against each other, the difference in color can be seen.

In this powder / laundry room, with poor lighting and a busy pattern and a relatively mild case of shading, I didn’t consider it bad enough to halt the job and reorder more paper, and so I went ahead and hung the room.

Everyone loves the finished room.

I am probably the only one who can spot this minor color difference.