Posts Tagged ‘batch’

Same Run – But Color Difference

June 8, 2018


One of the first things the installer does before starting a wallpaper job is to check the run numbers, to be sure it is the same for all the bolts of paper. This means they were all printed at the same time with the same batch of ink, so they will all be uniform in color.

Both these bolts are from the same run. But look closely, and you will see that the blue lines on the strip to the right are darker and thicker than those on the left. If these two strips of paper were placed next to each other on the wall, the difference would be very visible.

I am glad I noticed this before I started cutting any strips. I set aside the errant bolt, and hopefully won’t have to use it (I always have my clients buy a little extra, for repairs later and in case of instances like this). If I do need to cut into this bolt, the bathroom has a lot of choppy areas that are on separate walls where the color difference won’t be noticeable.

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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.

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.

 

Two Runs Are Not Fun

July 19, 2016
Digital Image

Digital Image

Digital Image

Digital Image


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.

Yes, Virginia, Run Number Matters

September 15, 2014

Digital ImageI was called to do a repair (dog ate the wallpaper) on a dining room I hung about a year ago. There wasn’t enough left over paper to replace the strip, so the homeowner had to order new paper. Since time had gone by, it was not possible to get the same run number.

A run, or batch, number refers to all the bolts of wallpaper that were printed at the same time. The next time they mix up a batch of ink and print wallpaper, it’s likely the color won’t be exactly the same. So it’s important to buy paper that is all the same run number. If not, there will be noticeable color differences between strips on your walls. Not good.

Look at the photo. The darker element on the paper at the top is an aqua color. On the strip below, the color is more of a sage green.

If you can’t get enough paper all in the same run to do the whole room, it’s OK to “break” the run in a corner, because your eye won’t notice the slight color difference, because lights hits each wall differently and changes the color a little. But know that you will also have to buy extra paper, when working with two different runs.

Runs and Dye Lots … Have Me Measure FIRST!

April 23, 2014

I recently did a bid where the homeowners already had their paper. The problem was, they had grossly underestimated how much paper they needed. They had a total of 5 single rolls, but the job actually called for something like 26.

This is a special problem with their selections. They had chosen some quite pretty custom made, very high end papers, made to order out of state.

The problems are many and are serious. Besides having to order quite a bit more of the very expensive paper, chances are the new paper will not match what they already have, so they will have to throw away that paper and buy even more.

When paper is made, there is a “batch,” “dye lot,” or “run” number, meaning all the paper printed at that time came out of the same “batch” of ink. It’s important to use paper all from the same run. Papers printed at a different time from a different run will have a very slight color variation, because the dyes and inks were mixed at a different time.

Will this matter? You bet! If you have to use a “broken run,” it’s best to keep different runs on seperate walls. You don’t notice a slight difference in color so much, because light hits one wall differently from how it hits another wall.

The bad part about this is that if you have to split a strip of paper, as you often do, you can’t use half of the strip on one wall and then on the second wall, and then start with a new run, because the color difference WILL show when strips are next to one another on a flat wall. You can never put different numbered runs next to one another on the same wall – the difference shows as clearly as if you used strips of totally different colors. This means you end up having to buy even more paper, to allow for the difference in dye lots.