(part 2 of 4)
background: Cutting Glass
The first thing to do is to cut the glass. I already cut most of the glass that I need for the windows in my doors, but I need to purchase and cut a little bit more. One thing that will be needed is 16 more little coloured glass squares. All the squares that I cut before are green so I decided to add a little variety and cut these out of amber. When I cut the glass, I used a plastic grid and a jig such that shown below to guide the class cutter over the glass. Glass cutter is really the wrong name, all the thing does is score the glass a little bit so that the glass can then be broken in two pieces along the scored line.
This is shown in the following series of photos:
(1) With the glass clamped in place on the grid, the glass is etched following the right side of the metal straight edge with the cutter:
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(2) The glass is snapped apart along the scored line with the assistance of a pair of special “running” pliers:
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(3) The long strip of glass is cut into many smaller 1 inch square pieces using similar techniques:
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As I have shown above, cutting glass along straight lines is easy. In fact, with this equipment, I find it much easier than cutting window glass as I did in my Dad’s hardware store back when I was 11 or 12. Those who have practiced more than I tell me that cutting curves is also easy and I expect that some day I will agree with them. But, for now, my window designs do not contain any curves.
Background: Assembling a window
Now, to assemble a window. The pattern is nailed to a board then a wooden strip is nailed at a right angle along two of the sides. This is shown in the first picture above. The outside edges of the window are formed from pieces of zinc that contains a channel that holds the glass. The zinc comes in long pieces and I cut four pieces of appropriate length using a shop-built miter “box” and a hack saw:
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Long pieces of lead “came” with channels in both sides are used to join the pieces of glass within the interior of the window. The lead came is very soft and easy to bend into shape –and out of shape if one is not careful. In order to made it somewhat more straight, before using a lead came, it is stretched about 8 inches for the four foot run. They sell clamps to hold the end of a section of came, but, I simply devised one using a regular clamp and a small piece of wood to fit into the channel.
The first photo belowshows a section of lead came before stretching. The second one shows it after stretching. Even though the lead came is more rigid after stretching, safe practice is to cut the stretched piece in half (as shown in the third photo below). Working with smaller piece reduces the chances of bending the lead came in a way that one does not intend. The lead is easily cut using a special purpose set of snips.
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In the photo below, some of the glass has been assembled and is being held in place by a few horseshoe nails used to push the assembly against the two wooden strips:
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In the photo below, all the glass has been assembled with lead between the interior pieces and zinc around the perimeter and wooden strips have been temporarily nailed in place in order to keep the assembly together while it awaits soldering.
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All the joints on both sides need to be soldered. First of all, flux is spread on the joints, then about 1/8 inch of solder is quickly applied and spread. I find that about 3 or 4 seconds application of the iron works well. In the photo below the joints on the far right of the window have been soldered.
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After soldering, some of the pieces still move and rattle around a bit withing the channels of lead and zinc. This is fixed by the application of glazing compound:
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The glazing compound is brushed under the edges of the lead and zinc came. Then calcium carbonate is poured onto the window and usede to both set the glazing compound and to clean the clazing compound from the glass:
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I find this to be a messy and time consuming process. For instance, her are the two windows, still somewhat dirty, even afer three applications of calcium carbonate with extensive brushing away of the residue:
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I certainly hope, over time, that I will get better at this final task.