Posts Tagged ‘trim guide’

Stinky Ink = Curling Seams

March 25, 2018


Some higher-end wallpapers are screen-printed with an ink that smells like moth balls. We call this stinky ink. And it’s a stinker to work with – because the edges curl badly. The inked surface of the paper absorbs moisture from the paste differently from the backing, so the backing swells and expands, pushing the inked surface away… resulting in curled edges. The top photo shows the edges curling on the pasted and booked strip, and the second photo shows the edges curling on the wall. I tried a lot of tacts, but could not get the seam to lie down.

This paper has a selvedge edge that is to be trimmed off by the installer(straight edge and razor blade and a steady hand). When I tried this standard technique, the seams curled and would not lie flat.

So I tried another approach. I put the pasted but un-trimmed paper on the wall, and then used the double-cut technique. A double cut is essentially a splice – you position one strip, then position the next strip, overlapping an inch or so of the second strip vertically over the edge of the first strip, all while lining up the pattern.

More clearly, you’re overlapping the left edge of the new strip onto the right edge of the existing strip.

Then, using the custom-made trim guide tool seen in the photo, and with a strip of 3″ wide heavy polystyrene plastic (called a Boggess strip, after the guy who invented and sells it) on the wall to protect it from being scored, I used a new single-edged razor blade to carefully cut through both layers of wallpaper.

In the third-to-last photo, I am removing the excess paper left at the seams after this trimming. In the second-to-last photo, I am smoothing the paper back into place. It’s also important to wipe off all paste residue left on the surface of the paper.

Who knows why, but this technique results in nice, flat, tight seams, with edges that do not curl.

Same paper, same paste, same wall – but no curl. Go figure.

Double-cutting takes more time, patience, material, and equipment. But when it’s called for, it might be the salvation for a contrary paper.

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Metal Leaves Marks on Wallpaper

July 31, 2017

Digital Image


There are some wallpapers that can be marred by metal… In the photo, I have purposely run a metal trim guide over the surface, so you can see how it looks.

The bad news is, we paperhangers use a lot of metal items – scissors, trim guide, smoother, and even things like a ring or bracelet could leave a mark, and even my expensive magnesium straightedge, which I bought because magnesium supposedly will not leave marks on paper, will, in fact, leave grey marks where it moves against the paper.

The good news is that most of the time, these marks will wipe off the surface with gentle rubbing with a damp cloth. Of course, you don’t want to overdo that.

The other good news is that, with some extra attention, it is possible to avoid most of these blemishes. Leave your jewelry at home. Blue painter’s tape will seal off the ends of the straightedge, and plastic trim guides can be substituted for metal for some tasks. And care should be taken when using scissors and other equipment to not slide it across the surface of the paper.

Trimming Grasscloth at the Ceiling

February 17, 2016

Digital Image

Digital Image


Have you ever wondered how wallpaper gets trimmed?

Here I am, using my trim guild to hold a strip of grasscloth tight against the joint between the wall and ceiling, and using a razor knife to trim off the excess.