Posts Tagged ‘dye lot’

Two Runs – Bad News

December 4, 2022
Always check the Run number before starting your project. Also called Batch or Dye Lot. Wallpaper that is printed at the same time will marked with a Run number. The next time the factory mixes up a pot of ink and prints wallpaper, it’s likely that there will be a slight shade difference between the two batches. If strips from these two different runs are placed next to each other on the wall, you will see a slight striped effect, a difference in color or depth between the two strips. It may be minor, but it’s noticeable and unpleasant.
You can use two different runs in the same room – but not on the same wall. You can “break” the run in a corner, and use one run on one wall and the other run on the other wall. You won’t notice the color difference this way. But it does eat up additional paper.
To avoid ending up with two different runs, first of all, always buy from a reputable company dedicated to selling wallpaper – not an outfit that also sells boots, hubcaps, cold medicine, and whatnot. Second, check the Run number as soon as you receive your material. That way you’ll have time to return it or otherwise resolve the issue, before install day.

Different Rolls = Different Pattern Match

November 17, 2022
It’s important that all your wallpaper rolls have the same run number , also called batch or dye lot . This means that they were printed at the same time with the same ink . Paper printed later with another batch of ink may be every so slightly different in color / shade . Looks bad on the wall.
The same thing can happen with trimming at the factory. Different runs can be trimmed differently from each other.
With this paper that I hung in a dining room last week (see previous post), the labels on all the rolls / bolts listed the same run number . But there was one bolt that was wrapped in not one, but two plastic wrappers. This raised an alarm in my head, because this indicates that it may have been a roll sent back to the factory, for whatever reason, and then repackaged. When this happens, you cannot be absolutely sure that the run number is actually that which is printed on the label. Somebody at the factory could have just grabbed a handy label and stuck it inside the wrapper.
I tried not to use this double-wrapped bolt of wallpaper. But on the last section of wall, I got to a point where I just needed to use it, for just two 6′ strips. I was pleased that the color of both the background and the motifs matched perfectly.
But not happy with this pattern mis-match.
It was easy to see that the factory trimmers had been placed about 1/8″ to one side, from where they had been placed when trimming the previous rolls.
It’s a busy pattern, and, from a distance, this undercut wasn’t all that noticeable.
But on the other side, there was repetition of the motif , and this will really catch your eye.
Happily, this only affected one seam, and since it was a very busy pattern, from just a few feet away you couldn’t notice it. Still, it bothered me.
So I pulled this strip on the left off the wall, laid it on my table, and used my straightedge and razor blade to trim off that repetitive leaf tip – about 1/8″ from the right edge of the strip.
The second strip, since it came off the same roll and had been trimmed the same, matched perfectly . This was also my last strip, so no more drama with mis-matched designs at the seams .
What the overall pattern looks like.
The pattern is by Rifle Paper , which has been finding its way into a lot of homes lately. This brand is usually a good quality non-woven material , and can be hung by pasting the paper or by paste the wall . It is designed to strip off the wall easily and in one piece, and with minimal damage to the wall , when you’re ready to redecorate . Very cute , cheerful patterns , and good price-point .
Note that the run number is printed on the label.
installer houston

Two Runs – Not Good

May 17, 2022

The homeowner accidentally ordered half as much wallpaper as was needed, so more was ordered. Unfortunately, we were not able to get the same run number (also called batch number or dye lot ).

Wallpaper bolts printed at the same time will all have the same run number. Then the next time the manufacture prints this material, he’ll mix up a new batch of ink. This new ink will almost assuredly be a teeny slight difference in shade .

You can’t put wallpaper strips from different runs next to each other on the same wall; you will see this slight color difference and the wall will have a subtle yet unpleasing striped effect.

You can, however, use different runs on different walls, “breaking” the run in a corner. You won’t notice the color difference because light hits different walls differently and causes a natural color difference.

This trick works, but it does require extra wallpaper.

Moral of the story:

~Always confirm how much paper is needed with the installer before ordering.

~Always buy a more than you think you’ll need; one extra double roll / bolt at minimum.

Run Numbers Matter – More

April 19, 2022
When you hang wallpaper, you need to make sure that all the rolls / bolts are from the same Run Number / Batch Number / Dye Lot. This means that the rolls were printed at the same time from the same batch of ink.
Another batch of ink that’s mixed up and then printed a few weeks later may be a very slightly different shade. You can easily see that color difference in this photo.
Placing strips from two different runs next to each other on the same wall will result in a subtle but unpleasant striped effect.
Besides the color differences of the ink, the printing press can be positioned differently, too.
Look at the bottom strip, at the left of the photo. The vertical line on the left is wide.
But now look at the strip on the right, which is on top. It’s from a different Run.
Here the vertical strips is narrow.
If strips of wallpaper from these two different runs were placed next to each other on a wall, not only would you see a color difference between them, but you would have an unpleasant striped effect, because one vertical stripe element in the design would be unnaturally wide, and another would be much narrower. In between would be other stripes that are the standard medium width.
Very un-uniform and very un-pleasing.
Before any wallpaper rolls get cut, pasted, and stuck to the wall, check to be sure the run numbers are all the same!

Step 1 – Checking Run Numbers

March 28, 2020


Before you start any wallpaper project, it is important to check the Run Numbers (Batch Numbers / Dye Lot).

This means that all the bolts / rolls have been printed at the same time, and are of the same shade.

Bolts printed at different times (different Run Numbers) will be of a very slightly different shade.

They canNOT be placed next to each other on the same wall, because you will notice a subtle-but-disagreeable difference in color between the strips of paper.

So make sure that all your bolts of paper are from the same Run Number.

Note that many on-line vendors are clueless about run numbers, so this is an important thing to check, if you buy low-priced papers on-line.

All the Same Run, Please

February 7, 2020


This homeowner measured her walls and ordered paper before I came by for a consultation. As often happens, she ordered too little paper.

When the additional bolts arrived, unfortunately, they were a different run.

Run number refers to all the bolts that were printed from the same batch or dye lot of ink. The next time the manufacturer prints a run of this wallpaper pattern, the inks will be ever so sightly a different shade.

You cannot place strips of wallpaper from different runs next to one another on the same wall, because you will see the color differences for the entire length of each strip.

You can, however, use different runs on different walls, because your eye won’t notice if the run is “broken” in a corner. This method does require the use of additional paper, though, in order to match the pattern.

In this case, we had enough extra paper. I was able to keep one run on the west and south walls, and then use the other run on the north and east walls.

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.

Need a Little Reading Material in the Bathroom? ??

November 2, 2018


What fun wallpaper! This is very similar to grasscloth. But, instead of using natural grasses and reeds, this material is made of strips cut from magazine pages, rolled and folded into long narrow strips, and then sewed onto a paper backing. In some of the columns, you can actually read the words!

There is a similar product made from old newspapers – appropriately named “Yesterday’s News.”

I hung this in a powder room in a new, contemporary home in the Rice Military neighborhood of Houston. The homeowner, Cristin Wells, is an interior designer http://www.wellsdesignedhome.com/ who recently moved here from Chicago (not far from my hometown of St. Louis!), and brings her sophisticated playfulness here to the Bayou City.

This product is similar to grasscloth in that the seams are very visible. So I engineered the room to have seams fall evenly spaced on each wall, which we call balancing, and which gives a pleasing effect.

In addition, the material can be shaded, or paneled, which means there can be a noticeable color difference between strips, even if they come off the same bolt. In the third photo, you see how I have rolled the paper out on the floor, to check for shading / paneling, so the homeowner will be aware of this issue, and so I can plot how and where to use the various strips.

Indeed, before consulting with me, the homeowner initially purchased two bolts of paper; when I measured the space I told her that she needed five more. The additional bolts arrived in a different run. Run and batch and dye lot numbers are important – all bolts from the same run or batch were printed at the same time with the same batch of ink, and will generally be pretty much the same shade. Papers from a different run will be a slightly different shade, and will be very noticeable if placed next to one another on the same wall. This is true even with this recycled magazine page material – see the third photo – although instead of printing with ink, the ladies who manufacture this stuff (usually in China or somewhere in Asia) are grabbing handfuls of magazine pages. As you can see, color variations are still quite possible / probable.

In addition to the 10′ high ceilings, the room had a few features that made the install tricky. One was a deeper than usual vanity, which was difficult and somewhat dangerous to reach over to access the wall. This was also a “floating” vanity, which hung suspended on the wall with a short space underneath it that wanted to be covered with wallpaper. Contorting myself under a 30″ deep vanity into a 5″ high space to stick a couple of strips of paper to a rear wall that no one would ever see questioned my sense of reason – but I could not imagine leaving the wall unpapered, so I “got ‘er done!” Sorry, no photo.

Being a contemporary styled home, the window was recessed with a 1/2″ return,. This meant that I had to bring the paper to the edge of the window, and then wrap a mere 1/2″ around an outside corner. The paper was thick and didn’t want to make this turn, and, when it did, it didn’t want to stay stuck – it kept trying to lift up. Wetting the paper helped soften it so it was more agreeable to making these turns, and in some areas I also used a razor blade to make light horizontal slits in the material, right on the edge of the corner, to reduce tension and allow it to turn more easily. Sorry, no photo.

Speaking of making cuts … This stuff was thick and hard to cut, so it took a lot of pressure and several swipes to make many of the cuts, even with a brand new razor blade. When I trimmed the material horizontally at the ceiling and floor, the strings that held the folded magazine pages to the backing were cut also, and they came loose. That meant that there was nothing holding the folded magazine pages to the paper.

It turns out that each of those horizontal strips of folded magazine pages contained about 6 layers of paper, each folded accordion-style. Threads were sewn on to hold them to the backing. But once the threads were cut, the accordion-folded papers unfurled, spread apart, and pushed away from the backing. So when you looked at the ceiling or floor lines, you saw a puffy ridge running the width of the strip.

What I ended up doing was to go up to the ceiling and then down to the floor edges, gently pry apart the fanned layers, and use wallpaper paste to adhere them to one another. I had to get sufficient paste behind each of the six layers, for the entire 3′ width of each strip, press them back together, hold them until the adhesive tacked up – all without getting any paste on the paper or on the ceiling.

All of the above added a lot of time to this job, and I didn’t leave until 9:30 p.m. But the room looked great when I was finished. From its initial uninspired dull grey paint job to the colorful and quite unexpected recycled magazine pages covering the walls, this powder room has experienced a major transformation.

The wallpaper is by Seabrook, which has been purchased by York. Both are wonderful brands.

Run Away From Two Different Runs

March 7, 2017

Digital Image

Digital Image

Look at the number right next to my pencil, and then look at the corresponding number below it. These two bolts of wallpaper have two different run / batch / dye lot numbers, meaning, they were printed at two different times, from two different batches of ink.

This means that they can be slightly, or even VERY slightly different in color. But even a slight difference in color can be eye-jarring on the wall, when you have two 9′ strips of wallpaper next to one another.